./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8 --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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:58:21,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:58:21,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:58:21,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:58:21,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:58:21,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:58:21,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:58:21,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:58:21,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:58:21,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:58:21,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:58:21,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:58:21,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:58:21,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:58:21,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:58:21,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:58:21,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:58:21,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:58:21,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:58:21,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:58:21,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:58:21,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:58:21,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:58:21,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:58:21,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:58:21,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:58:21,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:58:21,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:58:21,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:58:21,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:58:21,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:58:21,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:58:21,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:58:21,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:58:21,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:58:21,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:58:21,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:58:21,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:58:21,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:58:21,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:58:21,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:58:21,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 00:58:21,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:58:21,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:58:21,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:58:21,451 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:58:21,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:58:21,452 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:58:21,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:58:21,452 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:58:21,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:58:21,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:58:21,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:58:21,453 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:58:21,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:58:21,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:58:21,454 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:58:21,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 00:58:21,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 00:58:21,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:58:21,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:58:21,455 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 00:58:21,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:58:21,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:58:21,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:58:21,456 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 00:58:21,456 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 00:58:21,457 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 00:58:21,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:58:21,457 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:58:21,457 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:58:21,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:58:21,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:58:21,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:58:21,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:21,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:58:21,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:58:21,459 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:58:21,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:58:21,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:58:21,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:58:21,460 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_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2021-11-07 00:58:21,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:58:21,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:58:21,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:58:21,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:58:21,726 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:58:21,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2021-11-07 00:58:21,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/39af78133/5f26cd5ef4b241cca7566f12cc24a4c8/FLAGf4747f5fa [2021-11-07 00:58:22,292 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:58:22,293 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2021-11-07 00:58:22,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/39af78133/5f26cd5ef4b241cca7566f12cc24a4c8/FLAGf4747f5fa [2021-11-07 00:58:22,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/39af78133/5f26cd5ef4b241cca7566f12cc24a4c8 [2021-11-07 00:58:22,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:58:22,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:58:22,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:22,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:58:22,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:58:22,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:22" (1/1) ... [2021-11-07 00:58:22,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37106100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:22, skipping insertion in model container [2021-11-07 00:58:22,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:22" (1/1) ... [2021-11-07 00:58:22,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:58:22,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:23,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:23,242 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 00:58:23,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@484a6df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:23, skipping insertion in model container [2021-11-07 00:58:23,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:23,245 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:58:23,249 INFO L168 Benchmark]: Toolchain (without parser) took 609.72 ms. Allocated memory is still 115.3 MB. Free memory was 74.6 MB in the beginning and 86.4 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:58:23,249 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 115.3 MB. Free memory is still 92.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:58:23,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.01 ms. Allocated memory is still 115.3 MB. Free memory was 74.4 MB in the beginning and 86.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:58:23,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 115.3 MB. Free memory is still 92.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 607.01 ms. Allocated memory is still 115.3 MB. Free memory was 74.4 MB in the beginning and 86.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8 --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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:58:25,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:58:25,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:58:25,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:58:25,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:58:25,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:58:25,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:58:25,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:58:25,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:58:25,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:58:25,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:58:25,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:58:25,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:58:25,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:58:25,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:58:25,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:58:25,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:58:25,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:58:25,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:58:25,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:58:25,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:58:25,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:58:25,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:58:25,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:58:25,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:58:25,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:58:25,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:58:25,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:58:25,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:58:25,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:58:25,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:58:25,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:58:25,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:58:25,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:58:25,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:58:25,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:58:25,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:58:25,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:58:25,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:58:25,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:58:25,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:58:25,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 00:58:25,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:58:25,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:58:25,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:58:25,590 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:58:25,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:58:25,590 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:58:25,590 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:58:25,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:58:25,591 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:58:25,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 00:58:25,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 00:58:25,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:58:25,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:58:25,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 00:58:25,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:58:25,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:58:25,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:58:25,593 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 00:58:25,594 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 00:58:25,594 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 00:58:25,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:58:25,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:58:25,594 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:58:25,595 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:58:25,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:58:25,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:58:25,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:58:25,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:58:25,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:58:25,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:25,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:58:25,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:58:25,596 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:58:25,597 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:25,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:58:25,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:58:25,597 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_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2021-11-07 00:58:25,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:58:25,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:58:25,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:58:25,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:58:25,990 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:58:25,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2021-11-07 00:58:26,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/172122dcb/05f818f1f52a4100991d60352153f3d4/FLAG6eea3f85a [2021-11-07 00:58:26,632 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:58:26,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2021-11-07 00:58:26,659 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/172122dcb/05f818f1f52a4100991d60352153f3d4/FLAG6eea3f85a [2021-11-07 00:58:26,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/data/172122dcb/05f818f1f52a4100991d60352153f3d4 [2021-11-07 00:58:26,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:58:26,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:58:26,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:26,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:58:26,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:58:26,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:26" (1/1) ... [2021-11-07 00:58:26,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e06ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:26, skipping insertion in model container [2021-11-07 00:58:26,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:26" (1/1) ... [2021-11-07 00:58:26,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:58:26,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:27,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:27,540 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:58:27,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:27,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:27,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:58:27,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:27,762 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:58:27,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27 WrapperNode [2021-11-07 00:58:27,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:27,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:27,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:58:27,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:58:27,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:27,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:58:27,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:58:27,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:58:27,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:58:27,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:58:27,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:58:27,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:58:27,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (1/1) ... [2021-11-07 00:58:27,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:27,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:58:27,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:58:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 00:58:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 00:58:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:58:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 00:58:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:58:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 00:58:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:58:27,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:58:28,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:58:28,272 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-07 00:58:28,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:28 BoogieIcfgContainer [2021-11-07 00:58:28,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:58:28,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:58:28,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:58:28,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:58:28,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:58:26" (1/3) ... [2021-11-07 00:58:28,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3895ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:28, skipping insertion in model container [2021-11-07 00:58:28,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:27" (2/3) ... [2021-11-07 00:58:28,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3895ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:28, skipping insertion in model container [2021-11-07 00:58:28,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:28" (3/3) ... [2021-11-07 00:58:28,282 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test18.i [2021-11-07 00:58:28,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:58:28,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-07 00:58:28,329 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:58:28,335 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 [2021-11-07 00:58:28,335 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-07 00:58:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.826086956521739) internal successors, (42), 34 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) [2021-11-07 00:58:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 00:58:28,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:28,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 00:58:28,355 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 889510603, now seen corresponding path program 1 times [2021-11-07 00:58:28,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:28,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339167485] [2021-11-07 00:58:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:28,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:28,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:28,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:28,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:58:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:28,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:28,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:28,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339167485] [2021-11-07 00:58:28,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339167485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:28,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:28,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:28,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100594217] [2021-11-07 00:58:28,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:28,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:28,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:28,713 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.826086956521739) internal successors, (42), 34 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) 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) [2021-11-07 00:58:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:28,960 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2021-11-07 00:58:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:28,981 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 [2021-11-07 00:58:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:28,993 INFO L225 Difference]: With dead ends: 123 [2021-11-07 00:58:28,993 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 00:58:28,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 00:58:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 35. [2021-11-07 00:58:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 34 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) [2021-11-07 00:58:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-07 00:58:29,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 6 [2021-11-07 00:58:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:29,040 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-07 00:58:29,040 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) [2021-11-07 00:58:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-07 00:58:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 00:58:29,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:29,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 00:58:29,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:29,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:29,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash 889570185, now seen corresponding path program 1 times [2021-11-07 00:58:29,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:29,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902441407] [2021-11-07 00:58:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:29,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:29,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:29,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:29,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:58:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:29,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:29,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:29,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902441407] [2021-11-07 00:58:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902441407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:29,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:29,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:58:29,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818912133] [2021-11-07 00:58:29,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:29,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:29,383 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-07 00:58:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:29,470 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-07 00:58:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2021-11-07 00:58:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:29,471 INFO L225 Difference]: With dead ends: 61 [2021-11-07 00:58:29,472 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 00:58:29,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 00:58:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2021-11-07 00:58:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-07 00:58:29,476 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-07 00:58:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:29,476 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-07 00:58:29,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2021-11-07 00:58:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-07 00:58:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 00:58:29,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:29,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:29,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:29,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:29,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -593987202, now seen corresponding path program 1 times [2021-11-07 00:58:29,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:29,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950329882] [2021-11-07 00:58:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:29,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:29,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:29,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:58:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:29,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950329882] [2021-11-07 00:58:29,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950329882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:29,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:29,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:58:29,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370193144] [2021-11-07 00:58:29,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:58:29,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:58:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:29,934 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:30,028 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-11-07 00:58:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 9 [2021-11-07 00:58:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:30,030 INFO L225 Difference]: With dead ends: 82 [2021-11-07 00:58:30,032 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 00:58:30,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 00:58:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 40. [2021-11-07 00:58:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-11-07 00:58:30,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 9 [2021-11-07 00:58:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-11-07 00:58:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-11-07 00:58:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:58:30,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:30,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:30,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,268 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1232444971, now seen corresponding path program 1 times [2021-11-07 00:58:30,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:30,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211592971] [2021-11-07 00:58:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:30,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:30,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:30,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:58:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:30,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:30,375 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 6 treesize of output 5 [2021-11-07 00:58:30,425 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 00:58:30,425 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 16 treesize of output 21 [2021-11-07 00:58:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:30,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:30,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:30,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211592971] [2021-11-07 00:58:30,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211592971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:30,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:30,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:58:30,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026702248] [2021-11-07 00:58:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:30,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:30,517 INFO L87 Difference]: Start difference. First operand 40 states and 48 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) [2021-11-07 00:58:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:30,685 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-11-07 00:58:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:30,685 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 [2021-11-07 00:58:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:30,688 INFO L225 Difference]: With dead ends: 99 [2021-11-07 00:58:30,688 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 00:58:30,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 00:58:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 53. [2021-11-07 00:58:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-11-07 00:58:30,695 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 10 [2021-11-07 00:58:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:30,696 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-11-07 00:58:30,696 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) [2021-11-07 00:58:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-11-07 00:58:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:58:30,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:30,697 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:30,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:30,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,916 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1232444970, now seen corresponding path program 1 times [2021-11-07 00:58:30,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:30,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346438871] [2021-11-07 00:58:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:30,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:30,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:30,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:58:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 00:58:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:31,047 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 6 treesize of output 5 [2021-11-07 00:58:31,067 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 6 treesize of output 5 [2021-11-07 00:58:31,229 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 00:58:31,229 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 27 treesize of output 29 [2021-11-07 00:58:31,240 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:58:31,240 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 21 treesize of output 21 [2021-11-07 00:58:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:31,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:32,222 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 26 treesize of output 24 [2021-11-07 00:58:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:32,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:32,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346438871] [2021-11-07 00:58:32,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346438871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:32,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:32,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 00:58:32,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825778268] [2021-11-07 00:58:32,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 00:58:32,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:32,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 00:58:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:58:32,280 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:49,533 INFO L93 Difference]: Finished difference Result 223 states and 267 transitions. [2021-11-07 00:58:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 00:58:49,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-11-07 00:58:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:49,536 INFO L225 Difference]: With dead ends: 223 [2021-11-07 00:58:49,536 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 00:58:49,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-11-07 00:58:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 00:58:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 78. [2021-11-07 00:58:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 77 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2021-11-07 00:58:49,546 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 10 [2021-11-07 00:58:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:49,547 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2021-11-07 00:58:49,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2021-11-07 00:58:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 00:58:49,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:49,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:49,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 00:58:49,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:49,759 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2041791597, now seen corresponding path program 1 times [2021-11-07 00:58:49,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:49,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929694597] [2021-11-07 00:58:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:49,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:49,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:49,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:49,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:58:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:49,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:49,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:49,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:49,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929694597] [2021-11-07 00:58:49,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929694597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:49,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:49,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:49,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045675365] [2021-11-07 00:58:49,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:49,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:49,951 INFO L87 Difference]: Start difference. First operand 78 states and 106 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-11-07 00:58:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:50,052 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2021-11-07 00:58:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:50,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-11-07 00:58:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:50,053 INFO L225 Difference]: With dead ends: 109 [2021-11-07 00:58:50,053 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 00:58:50,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 00:58:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 58. [2021-11-07 00:58:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.5833333333333333) 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) [2021-11-07 00:58:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-11-07 00:58:50,059 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 10 [2021-11-07 00:58:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:50,059 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-11-07 00:58:50,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-11-07 00:58:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2021-11-07 00:58:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 00:58:50,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:50,060 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:50,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:50,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:50,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1031305281, now seen corresponding path program 1 times [2021-11-07 00:58:50,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:50,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338303905] [2021-11-07 00:58:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:50,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:50,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:50,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:58:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:50,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:50,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:50,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:50,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338303905] [2021-11-07 00:58:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338303905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:50,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:50,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:50,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272105978] [2021-11-07 00:58:50,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:50,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:50,488 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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) [2021-11-07 00:58:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:50,537 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-11-07 00:58:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 [2021-11-07 00:58:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:50,539 INFO L225 Difference]: With dead ends: 103 [2021-11-07 00:58:50,539 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 00:58:50,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 00:58:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2021-11-07 00:58:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2021-11-07 00:58:50,555 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 12 [2021-11-07 00:58:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:50,556 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2021-11-07 00:58:50,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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) [2021-11-07 00:58:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2021-11-07 00:58:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 00:58:50,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:50,560 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:50,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:50,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:50,771 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1088563583, now seen corresponding path program 1 times [2021-11-07 00:58:50,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:50,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933062086] [2021-11-07 00:58:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:50,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:50,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:50,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:58:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:50,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:50,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933062086] [2021-11-07 00:58:50,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933062086] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:50,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:50,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:58:50,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285596741] [2021-11-07 00:58:50,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:58:50,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:58:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:50,955 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:51,022 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-11-07 00:58:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:51,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-11-07 00:58:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:51,023 INFO L225 Difference]: With dead ends: 62 [2021-11-07 00:58:51,023 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 00:58:51,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:51,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 00:58:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-07 00:58:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.434782608695652) internal successors, (66), 55 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) [2021-11-07 00:58:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-07 00:58:51,027 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 12 [2021-11-07 00:58:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:51,027 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-07 00:58:51,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-07 00:58:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 00:58:51,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:51,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:51,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:51,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash -614268748, now seen corresponding path program 1 times [2021-11-07 00:58:51,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:51,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466178609] [2021-11-07 00:58:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:51,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:51,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:51,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:58:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:51,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:51,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:51,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466178609] [2021-11-07 00:58:51,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466178609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:51,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:51,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 00:58:51,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87185293] [2021-11-07 00:58:51,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:58:51,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:58:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:51,562 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:51,697 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2021-11-07 00:58:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:58:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-07 00:58:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:51,699 INFO L225 Difference]: With dead ends: 87 [2021-11-07 00:58:51,699 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 00:58:51,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 00:58:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-11-07 00:58:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.391304347826087) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-07 00:58:51,702 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 13 [2021-11-07 00:58:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:51,702 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-07 00:58:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-07 00:58:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 00:58:51,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:51,704 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:51,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:51,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:51,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1901744101, now seen corresponding path program 1 times [2021-11-07 00:58:51,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:51,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806009308] [2021-11-07 00:58:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:51,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:51,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:51,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:51,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:58:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:58:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:52,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:56,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:56,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806009308] [2021-11-07 00:58:56,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806009308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:56,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:56,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:56,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240354219] [2021-11-07 00:58:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:58:56,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:56,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:58:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2021-11-07 00:58:56,403 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:56,640 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-11-07 00:58:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:58:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 00:58:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:56,641 INFO L225 Difference]: With dead ends: 83 [2021-11-07 00:58:56,641 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 00:58:56,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=32, Invalid=76, Unknown=2, NotChecked=0, Total=110 [2021-11-07 00:58:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 00:58:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2021-11-07 00:58:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-07 00:58:56,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 15 [2021-11-07 00:58:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:56,645 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-07 00:58:56,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-07 00:58:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 00:58:56,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:56,646 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:56,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:56,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:56,852 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:58:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1795075981, now seen corresponding path program 1 times [2021-11-07 00:58:56,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:56,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604159138] [2021-11-07 00:58:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:56,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:56,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:56,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:58:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:56,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:56,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:57,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:57,746 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 11 treesize of output 9 [2021-11-07 00:58:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:58,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:58,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604159138] [2021-11-07 00:58:58,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604159138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:58,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [145698364] [2021-11-07 00:58:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:58,224 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:58,229 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:58,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 00:58:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:58,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:58,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:58,892 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 11 treesize of output 9 [2021-11-07 00:58:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:59,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [145698364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:59,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027113696] [2021-11-07 00:58:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:59,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:58:59,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:59,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:58:59,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 00:58:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:59,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:59,644 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 11 treesize of output 9 [2021-11-07 00:58:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:59,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027113696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:59,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:58:59,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-07 00:58:59,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300457646] [2021-11-07 00:58:59,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 00:58:59,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:59,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 00:58:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:58:59,771 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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) [2021-11-07 00:59:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:01,584 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2021-11-07 00:59:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 00:59:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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 18 [2021-11-07 00:59:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:01,586 INFO L225 Difference]: With dead ends: 146 [2021-11-07 00:59:01,587 INFO L226 Difference]: Without dead ends: 146 [2021-11-07 00:59:01,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2021-11-07 00:59:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-07 00:59:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 67. [2021-11-07 00:59:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 66 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) [2021-11-07 00:59:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-11-07 00:59:01,591 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 18 [2021-11-07 00:59:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:01,592 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-11-07 00:59:01,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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) [2021-11-07 00:59:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-11-07 00:59:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 00:59:01,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:01,593 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:01,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-07 00:59:01,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:02,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:02,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:02,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:59:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash 187219428, now seen corresponding path program 1 times [2021-11-07 00:59:02,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:02,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594844812] [2021-11-07 00:59:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:02,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:02,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:02,198 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:02,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:59:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:02,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:02,507 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 15 treesize of output 11 [2021-11-07 00:59:02,687 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 [2021-11-07 00:59:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:02,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:02,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:02,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594844812] [2021-11-07 00:59:02,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594844812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:02,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [839298181] [2021-11-07 00:59:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:02,866 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:02,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:02,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:02,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 00:59:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:03,216 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 15 treesize of output 11 [2021-11-07 00:59:03,365 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 [2021-11-07 00:59:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:03,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [839298181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:03,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171156169] [2021-11-07 00:59:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:03,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:03,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:03,458 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:03,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 00:59:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:03,785 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 15 treesize of output 11 [2021-11-07 00:59:03,910 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 [2021-11-07 00:59:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:03,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:03,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171156169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:03,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:59:03,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 10, 7, 10, 7] total 14 [2021-11-07 00:59:04,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243087701] [2021-11-07 00:59:04,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 00:59:04,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:04,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 00:59:04,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:59:04,001 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:04,761 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2021-11-07 00:59:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 00:59:04,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 00:59:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:04,762 INFO L225 Difference]: With dead ends: 103 [2021-11-07 00:59:04,762 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 00:59:04,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2021-11-07 00:59:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 00:59:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2021-11-07 00:59:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.35) internal successors, (81), 67 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-11-07 00:59:04,766 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 19 [2021-11-07 00:59:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:04,766 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-11-07 00:59:04,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-11-07 00:59:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 00:59:04,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:04,768 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:04,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:04,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:05,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-07 00:59:05,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:05,376 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:59:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1508835058, now seen corresponding path program 1 times [2021-11-07 00:59:05,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:05,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674765760] [2021-11-07 00:59:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:05,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:05,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:05,378 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:05,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:59:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:05,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:05,753 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 19 treesize of output 15 [2021-11-07 00:59:05,970 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 [2021-11-07 00:59:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:06,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:06,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:06,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674765760] [2021-11-07 00:59:06,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674765760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:06,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545546242] [2021-11-07 00:59:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:06,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:06,276 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:06,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 00:59:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:06,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:06,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:06,709 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 19 treesize of output 15 [2021-11-07 00:59:06,866 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 [2021-11-07 00:59:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:06,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545546242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:06,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658355706] [2021-11-07 00:59:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:06,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:06,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:07,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 00:59:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:59:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:07,463 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 23 treesize of output 19 [2021-11-07 00:59:07,766 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 [2021-11-07 00:59:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:07,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:07,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658355706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:07,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:59:07,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 10, 7, 10, 7] total 21 [2021-11-07 00:59:07,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752189376] [2021-11-07 00:59:07,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 00:59:07,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 00:59:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:59:07,920 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:10,189 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-11-07 00:59:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 00:59:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2021-11-07 00:59:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:10,191 INFO L225 Difference]: With dead ends: 128 [2021-11-07 00:59:10,191 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 00:59:10,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 00:59:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 00:59:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 73. [2021-11-07 00:59:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.323076923076923) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-11-07 00:59:10,196 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 20 [2021-11-07 00:59:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:10,197 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-11-07 00:59:10,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-11-07 00:59:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 00:59:10,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:10,198 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:10,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 00:59:10,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 00:59:10,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:10,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:10,802 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:59:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash 497717808, now seen corresponding path program 1 times [2021-11-07 00:59:10,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:10,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992164301] [2021-11-07 00:59:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:10,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:10,803 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:10,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 00:59:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:59:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:11,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:11,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:11,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992164301] [2021-11-07 00:59:11,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992164301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:11,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:11,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:59:11,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781311230] [2021-11-07 00:59:11,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:11,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:11,199 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:11,242 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-11-07 00:59:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:59:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-11-07 00:59:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:11,243 INFO L225 Difference]: With dead ends: 81 [2021-11-07 00:59:11,243 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 00:59:11,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:59:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 00:59:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2021-11-07 00:59:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-11-07 00:59:11,246 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 20 [2021-11-07 00:59:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:11,247 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-11-07 00:59:11,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-11-07 00:59:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 00:59:11,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:11,248 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:11,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:11,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:11,456 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:59:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -470753370, now seen corresponding path program 1 times [2021-11-07 00:59:11,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:11,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320207130] [2021-11-07 00:59:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:11,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:11,459 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:11,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 00:59:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:11,777 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 6 treesize of output 5 [2021-11-07 00:59:11,850 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 24 treesize of output 20 [2021-11-07 00:59:12,037 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 [2021-11-07 00:59:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:12,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:12,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:12,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320207130] [2021-11-07 00:59:12,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320207130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:12,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1626148075] [2021-11-07 00:59:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:12,272 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:12,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:12,281 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:12,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 00:59:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:12,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:59:12,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:12,710 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 6 treesize of output 5 [2021-11-07 00:59:12,752 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 24 treesize of output 20 [2021-11-07 00:59:12,855 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 30 treesize of output 22 [2021-11-07 00:59:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:12,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1626148075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:13,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954633376] [2021-11-07 00:59:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:13,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:13,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:13,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 00:59:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 00:59:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:13,632 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 6 treesize of output 5 [2021-11-07 00:59:13,674 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 24 treesize of output 20 [2021-11-07 00:59:13,768 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 [2021-11-07 00:59:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:13,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:13,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954633376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:13,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:59:13,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 10, 7, 10, 7] total 20 [2021-11-07 00:59:13,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161101934] [2021-11-07 00:59:13,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 00:59:13,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 00:59:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-07 00:59:13,921 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:15,412 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-07 00:59:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 00:59:15,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 00:59:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:15,414 INFO L225 Difference]: With dead ends: 69 [2021-11-07 00:59:15,414 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 00:59:15,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 00:59:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 00:59:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-11-07 00:59:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-11-07 00:59:15,418 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 21 [2021-11-07 00:59:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:15,418 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-11-07 00:59:15,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-11-07 00:59:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 00:59:15,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:15,419 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:15,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 00:59:15,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 00:59:15,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:16,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:16,032 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 00:59:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1007074626, now seen corresponding path program 1 times [2021-11-07 00:59:16,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:16,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972571779] [2021-11-07 00:59:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:16,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:16,033 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:16,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 00:59:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 00:59:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:16,376 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 6 treesize of output 5 [2021-11-07 00:59:16,382 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 6 treesize of output 5 [2021-11-07 00:59:16,513 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 00:59:16,513 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 12 treesize of output 18 [2021-11-07 00:59:16,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:59:16,533 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 15 treesize of output 15 [2021-11-07 00:59:16,686 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:59:16,687 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 17 treesize of output 17 [2021-11-07 00:59:16,693 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 00:59:16,844 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 00:59:16,844 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 27 treesize of output 29 [2021-11-07 00:59:16,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:59:16,863 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 21 treesize of output 21 [2021-11-07 00:59:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:16,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:19,694 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 00:59:19,695 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 44 treesize of output 43 [2021-11-07 00:59:33,050 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 00:59:33,050 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 44 treesize of output 43 [2021-11-07 00:59:49,375 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 57 treesize of output 55 [2021-11-07 00:59:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:49,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:49,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972571779] [2021-11-07 00:59:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972571779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:49,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001660854] [2021-11-07 00:59:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:49,498 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:49,500 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:49,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 00:59:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:50,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 00:59:50,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:50,122 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 6 treesize of output 5 [2021-11-07 00:59:50,130 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 6 treesize of output 5 [2021-11-07 00:59:50,210 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 00:59:50,210 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 26 treesize of output 28 [2021-11-07 00:59:50,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:59:50,222 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 20 [2021-11-07 00:59:50,333 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 00:59:50,334 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 26 treesize of output 28 [2021-11-07 00:59:50,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:59:50,346 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 20 [2021-11-07 00:59:50,480 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 00:59:50,480 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 27 treesize of output 29 [2021-11-07 00:59:50,492 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 00:59:50,492 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 21 treesize of output 21 [2021-11-07 00:59:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:50,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:51,020 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 00:59:51,021 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 44 treesize of output 43 [2021-11-07 01:00:14,432 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:00:14,432 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 50 treesize of output 49 [2021-11-07 01:00:45,313 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 59 treesize of output 57 [2021-11-07 01:00:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:45,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001660854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:00:45,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430318212] [2021-11-07 01:00:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:45,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:00:45,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:00:45,326 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:00:45,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:00:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:00:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:00:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:00:45,819 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 6 treesize of output 5 [2021-11-07 01:00:45,834 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 6 treesize of output 5 [2021-11-07 01:00:45,943 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:00:45,943 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 27 treesize of output 29 [2021-11-07 01:00:45,959 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:00:45,960 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 21 treesize of output 21 [2021-11-07 01:00:46,078 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:00:46,078 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 28 treesize of output 30 [2021-11-07 01:00:46,090 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:00:46,091 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 22 [2021-11-07 01:00:46,243 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:00:46,243 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 28 treesize of output 30 [2021-11-07 01:00:46,255 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:00:46,256 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 22 [2021-11-07 01:00:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:00:46,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:00:48,914 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:00:48,915 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 44 treesize of output 43 [2021-11-07 01:01:29,482 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:01:29,482 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 51 treesize of output 50 [2021-11-07 01:02:16,005 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 55 treesize of output 53 [2021-11-07 01:02:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:16,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430318212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:16,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:02:16,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10, 12, 10, 12] total 32 [2021-11-07 01:02:16,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788306800] [2021-11-07 01:02:16,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 01:02:16,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 01:02:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=841, Unknown=56, NotChecked=0, Total=1056 [2021-11-07 01:02:16,015 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 33 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) [2021-11-07 01:02:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:59,909 INFO L93 Difference]: Finished difference Result 212 states and 228 transitions. [2021-11-07 01:02:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:02:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 33 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) Word has length 22 [2021-11-07 01:02:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:59,916 INFO L225 Difference]: With dead ends: 212 [2021-11-07 01:02:59,917 INFO L226 Difference]: Without dead ends: 212 [2021-11-07 01:02:59,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 207.7s TimeCoverageRelationStatistics Valid=405, Invalid=1602, Unknown=63, NotChecked=0, Total=2070 [2021-11-07 01:02:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-07 01:02:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 79. [2021-11-07 01:02:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-11-07 01:02:59,922 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 22 [2021-11-07 01:02:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:59,922 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-11-07 01:02:59,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 33 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) [2021-11-07 01:02:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-11-07 01:02:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:02:59,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:59,926 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:59,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:00,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-07 01:03:00,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:00,539 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:03:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1623697155, now seen corresponding path program 1 times [2021-11-07 01:03:00,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:00,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496180525] [2021-11-07 01:03:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:00,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:00,541 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:00,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:03:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:01,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:01,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:01,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:01,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496180525] [2021-11-07 01:03:01,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496180525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:01,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942424446] [2021-11-07 01:03:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:01,433 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:01,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:01,440 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:01,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:03:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:02,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:02,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:02,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942424446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:02,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735475850] [2021-11-07 01:03:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:02,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:02,278 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:02,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:03:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:02,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:02,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:03,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735475850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:03,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:03:03,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2021-11-07 01:03:03,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282029170] [2021-11-07 01:03:03,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:03:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:03:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:03:03,092 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 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) [2021-11-07 01:03:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:03,965 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2021-11-07 01:03:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:03:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 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) Word has length 24 [2021-11-07 01:03:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:03,967 INFO L225 Difference]: With dead ends: 197 [2021-11-07 01:03:03,968 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 01:03:03,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:03:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 01:03:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 82. [2021-11-07 01:03:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2021-11-07 01:03:03,971 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 24 [2021-11-07 01:03:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:03,972 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2021-11-07 01:03:03,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 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) [2021-11-07 01:03:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2021-11-07 01:03:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:03:03,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:03,973 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:03,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:04,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 01:03:04,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:04,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:04,577 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:03:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1145335209, now seen corresponding path program 1 times [2021-11-07 01:03:04,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:04,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437698135] [2021-11-07 01:03:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:04,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:04,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:04,579 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:04,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:03:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:05,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:05,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:05,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437698135] [2021-11-07 01:03:05,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437698135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:05,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1498017292] [2021-11-07 01:03:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:05,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:05,313 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:03:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:06,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1498017292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:06,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505001041] [2021-11-07 01:03:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:06,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:06,106 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:06,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:03:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:06,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:03:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:06,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:06,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505001041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:06,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:03:06,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2021-11-07 01:03:06,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363407325] [2021-11-07 01:03:06,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:03:06,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:03:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:03:06,970 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:07,137 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-11-07 01:03:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:03:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:07,139 INFO L225 Difference]: With dead ends: 98 [2021-11-07 01:03:07,139 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 01:03:07,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:03:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 01:03:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-11-07 01:03:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-11-07 01:03:07,142 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 24 [2021-11-07 01:03:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:07,143 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-11-07 01:03:07,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-11-07 01:03:07,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:03:07,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:07,144 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:07,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 01:03:07,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-07 01:03:07,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 01:03:07,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:07,757 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:03:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1155552056, now seen corresponding path program 1 times [2021-11-07 01:03:07,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:07,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872477968] [2021-11-07 01:03:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:07,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:07,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:07,758 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:07,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:03:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:08,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:03:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:08,247 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 6 treesize of output 5 [2021-11-07 01:03:08,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:03:08,347 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 15 treesize of output 15 [2021-11-07 01:03:08,427 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 20 treesize of output 16 [2021-11-07 01:03:08,614 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 [2021-11-07 01:03:08,700 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:03:08,701 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 21 treesize of output 26 [2021-11-07 01:03:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:08,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:09,046 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 9 treesize of output 7 [2021-11-07 01:03:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:09,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:09,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872477968] [2021-11-07 01:03:09,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872477968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:09,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757894414] [2021-11-07 01:03:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:09,523 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:09,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:09,524 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:03:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:10,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:03:10,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:10,261 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 6 treesize of output 5 [2021-11-07 01:03:10,338 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:03:10,338 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 15 treesize of output 15 [2021-11-07 01:03:10,390 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 20 treesize of output 16 [2021-11-07 01:03:10,533 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 [2021-11-07 01:03:10,599 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:03:10,599 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 20 treesize of output 25 [2021-11-07 01:03:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:10,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:10,835 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 9 treesize of output 7 [2021-11-07 01:03:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:10,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757894414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:10,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894659794] [2021-11-07 01:03:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:10,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:10,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:10,955 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:10,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 01:03:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:11,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:03:11,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:11,577 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 6 treesize of output 5 [2021-11-07 01:03:11,643 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:03:11,643 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 20 [2021-11-07 01:03:11,698 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 20 treesize of output 16 [2021-11-07 01:03:12,077 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 [2021-11-07 01:03:12,122 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:03:12,123 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 19 treesize of output 24 [2021-11-07 01:03:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:12,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:12,679 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 9 treesize of output 7 [2021-11-07 01:03:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:12,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894659794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:12,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:03:12,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 24 [2021-11-07 01:03:12,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470786661] [2021-11-07 01:03:12,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:03:12,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:03:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:03:12,754 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 25 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) [2021-11-07 01:03:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:25,959 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-11-07 01:03:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:03:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 25 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) Word has length 26 [2021-11-07 01:03:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:25,960 INFO L225 Difference]: With dead ends: 146 [2021-11-07 01:03:25,960 INFO L226 Difference]: Without dead ends: 146 [2021-11-07 01:03:25,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 01:03:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-07 01:03:25,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2021-11-07 01:03:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2021-11-07 01:03:25,964 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 26 [2021-11-07 01:03:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:25,965 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2021-11-07 01:03:25,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 25 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) [2021-11-07 01:03:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2021-11-07 01:03:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:03:25,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:25,966 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:25,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-07 01:03:26,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-07 01:03:26,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 01:03:26,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:26,570 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:03:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:26,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1462375262, now seen corresponding path program 1 times [2021-11-07 01:03:26,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:26,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863497186] [2021-11-07 01:03:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:26,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:26,572 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:03:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:03:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:27,541 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 35 treesize of output 31 [2021-11-07 01:03:27,868 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 37 treesize of output 25 [2021-11-07 01:03:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:55,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:55,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863497186] [2021-11-07 01:03:55,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863497186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:55,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002421246] [2021-11-07 01:03:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:55,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:55,520 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:55,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:03:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:03:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:58,792 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 35 treesize of output 31 [2021-11-07 01:03:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-07 01:04:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:03,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:17,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002421246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:17,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920465345] [2021-11-07 01:04:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:17,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:04:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:04:17,110 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:04:17,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 01:04:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:04:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:17,880 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 01:04:17,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 01:04:25,189 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 35 treesize of output 31 [2021-11-07 01:04:26,128 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 37 treesize of output 25 [2021-11-07 01:04:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:32,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:40,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920465345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:40,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:04:40,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14, 14, 13, 12] total 56 [2021-11-07 01:04:40,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535753598] [2021-11-07 01:04:40,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 01:04:40,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:40,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 01:04:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2884, Unknown=18, NotChecked=0, Total=3192 [2021-11-07 01:04:40,382 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 57 states, 56 states have (on average 2.25) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:21,550 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-07 01:05:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:05:21,551 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.25) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 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 27 [2021-11-07 01:05:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:21,552 INFO L225 Difference]: With dead ends: 108 [2021-11-07 01:05:21,552 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 01:05:21,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 92.5s TimeCoverageRelationStatistics Valid=549, Invalid=4825, Unknown=28, NotChecked=0, Total=5402 [2021-11-07 01:05:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 01:05:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-11-07 01:05:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.2) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-11-07 01:05:21,558 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 27 [2021-11-07 01:05:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:21,559 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-11-07 01:05:21,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.25) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-11-07 01:05:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:05:21,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:21,562 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:21,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:21,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:21,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-07 01:05:22,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:22,176 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:05:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1590432948, now seen corresponding path program 1 times [2021-11-07 01:05:22,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:22,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591134742] [2021-11-07 01:05:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:22,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:22,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:22,178 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:22,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 01:05:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:05:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:24,054 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 34 treesize of output 30 [2021-11-07 01:05:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:25,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:25,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591134742] [2021-11-07 01:05:25,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591134742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:25,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714535209] [2021-11-07 01:05:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:25,008 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:25,017 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:25,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 01:05:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:05:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:26,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:26,710 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 34 treesize of output 30 [2021-11-07 01:05:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:27,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714535209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:27,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260528705] [2021-11-07 01:05:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:27,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:05:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:05:27,230 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:05:27,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 01:05:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:05:28,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:28,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:28,767 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 34 treesize of output 30 [2021-11-07 01:05:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:29,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260528705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:29,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:05:29,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2021-11-07 01:05:29,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103816356] [2021-11-07 01:05:29,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:05:29,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:05:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:05:29,237 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:33,102 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2021-11-07 01:05:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 01:05:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:05:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:33,104 INFO L225 Difference]: With dead ends: 179 [2021-11-07 01:05:33,104 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 01:05:33,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:05:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 01:05:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 99. [2021-11-07 01:05:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-11-07 01:05:33,108 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 30 [2021-11-07 01:05:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:33,108 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-11-07 01:05:33,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-11-07 01:05:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:05:33,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:33,109 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:33,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:33,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-07 01:05:33,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:33,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:33,723 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:05:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2058781141, now seen corresponding path program 1 times [2021-11-07 01:05:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:33,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365012796] [2021-11-07 01:05:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:33,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:33,725 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:33,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:05:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:05:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:34,662 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 15 treesize of output 11 [2021-11-07 01:05:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:05:35,066 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 [2021-11-07 01:05:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:35,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:35,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:35,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365012796] [2021-11-07 01:05:35,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365012796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:35,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031358429] [2021-11-07 01:05:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:35,549 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:35,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:35,549 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:35,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:05:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:36,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:05:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:36,801 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 15 treesize of output 11 [2021-11-07 01:05:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:36,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:05:37,073 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 [2021-11-07 01:05:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:37,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031358429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:37,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359577823] [2021-11-07 01:05:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:37,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:05:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:05:37,292 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:05:37,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 01:05:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:05:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:38,388 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 15 treesize of output 11 [2021-11-07 01:05:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:38,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:05:38,735 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 [2021-11-07 01:05:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:38,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359577823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:38,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:05:38,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 12, 9] total 18 [2021-11-07 01:05:38,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064555691] [2021-11-07 01:05:38,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:05:38,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:05:38,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:05:38,953 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:42,707 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2021-11-07 01:05:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:05:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 01:05:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:42,711 INFO L225 Difference]: With dead ends: 132 [2021-11-07 01:05:42,711 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 01:05:42,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:05:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 01:05:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2021-11-07 01:05:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.184782608695652) internal successors, (109), 99 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2021-11-07 01:05:42,714 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 31 [2021-11-07 01:05:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:42,715 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2021-11-07 01:05:42,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2021-11-07 01:05:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:05:42,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:42,716 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:42,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:42,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-07 01:05:43,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:43,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:43,324 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:05:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash 602294155, now seen corresponding path program 1 times [2021-11-07 01:05:43,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:43,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695895667] [2021-11-07 01:05:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:43,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:43,326 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:43,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-07 01:05:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:05:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:44,361 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 19 treesize of output 15 [2021-11-07 01:05:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:44,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:05:44,862 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 [2021-11-07 01:05:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:44,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:45,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:45,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695895667] [2021-11-07 01:05:45,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695895667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:45,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [114769146] [2021-11-07 01:05:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:45,447 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:45,448 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:45,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-07 01:05:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:05:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:46,809 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 19 treesize of output 15 [2021-11-07 01:05:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:46,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:05:47,152 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 [2021-11-07 01:05:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:47,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [114769146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:47,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194823270] [2021-11-07 01:05:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:47,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:05:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:05:47,430 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:05:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 01:05:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:05:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:48,632 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 19 treesize of output 15 [2021-11-07 01:05:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:48,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 01:05:48,987 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 [2021-11-07 01:05:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:49,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194823270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:49,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:05:49,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 12, 9] total 19 [2021-11-07 01:05:49,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772701765] [2021-11-07 01:05:49,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:05:49,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:05:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:05:49,258 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 20 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) [2021-11-07 01:05:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:54,623 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2021-11-07 01:05:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:05:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 20 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) Word has length 32 [2021-11-07 01:05:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:54,625 INFO L225 Difference]: With dead ends: 130 [2021-11-07 01:05:54,625 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 01:05:54,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 163 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:05:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 01:05:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2021-11-07 01:05:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-11-07 01:05:54,629 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 32 [2021-11-07 01:05:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:54,629 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-11-07 01:05:54,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 20 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) [2021-11-07 01:05:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-11-07 01:05:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:05:54,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:54,630 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:54,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-07 01:05:54,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:55,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:55,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:55,232 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:05:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1491249709, now seen corresponding path program 1 times [2021-11-07 01:05:55,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:55,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988414783] [2021-11-07 01:05:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:55,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:55,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:55,235 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:55,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-07 01:05:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:05:56,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:56,272 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 6 treesize of output 5 [2021-11-07 01:05:56,353 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 24 treesize of output 20 [2021-11-07 01:05:56,468 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-07 01:05:56,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 38 [2021-11-07 01:05:56,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:56,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 48 treesize of output 43 [2021-11-07 01:05:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2021-11-07 01:05:57,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:05:57,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-07 01:05:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:57,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:58,741 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 56 treesize of output 54 [2021-11-07 01:05:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:59,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:59,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988414783] [2021-11-07 01:05:59,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988414783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:59,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [63709017] [2021-11-07 01:05:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:59,056 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:59,057 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:59,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-07 01:06:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:00,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:06:00,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:00,527 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 6 treesize of output 5 [2021-11-07 01:06:00,567 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 24 treesize of output 20 [2021-11-07 01:06:00,821 INFO L354 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2021-11-07 01:06:00,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 57 [2021-11-07 01:06:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:01,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 57 treesize of output 52 [2021-11-07 01:06:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:02,381 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:06:02,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 70 [2021-11-07 01:06:02,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:06:02,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2021-11-07 01:06:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:02,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:03,397 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 65 treesize of output 63 [2021-11-07 01:06:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:03,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [63709017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:03,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982254246] [2021-11-07 01:06:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:03,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:06:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:06:03,704 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:06:03,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 01:06:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:06:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:04,970 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 6 treesize of output 5 [2021-11-07 01:06:05,009 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 24 treesize of output 20 [2021-11-07 01:06:05,094 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-07 01:06:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 39 [2021-11-07 01:06:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 47 treesize of output 42 [2021-11-07 01:06:05,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-07 01:06:05,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:06:05,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-11-07 01:06:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:06,317 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 56 treesize of output 54 [2021-11-07 01:06:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:06,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982254246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:06,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:06:06,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17, 14, 17, 14] total 42 [2021-11-07 01:06:06,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730202414] [2021-11-07 01:06:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 01:06:06,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 01:06:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1610, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 01:06:06,376 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:50,619 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-11-07 01:06:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 01:06:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:06:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:50,622 INFO L225 Difference]: With dead ends: 125 [2021-11-07 01:06:50,622 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 01:06:50,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 139 SyntacticMatches, 16 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2574 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=734, Invalid=5738, Unknown=8, NotChecked=0, Total=6480 [2021-11-07 01:06:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 01:06:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2021-11-07 01:06:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 101 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-11-07 01:06:50,641 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 33 [2021-11-07 01:06:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:50,641 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-11-07 01:06:50,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-11-07 01:06:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:06:50,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:50,643 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:50,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 01:06:50,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-11-07 01:06:51,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-07 01:06:51,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:51,248 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:06:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1321539984, now seen corresponding path program 2 times [2021-11-07 01:06:51,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:51,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423617414] [2021-11-07 01:06:51,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:06:51,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:51,250 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:51,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-07 01:06:52,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:06:52,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:06:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:06:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:52,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:52,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:52,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423617414] [2021-11-07 01:06:52,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423617414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:52,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005428821] [2021-11-07 01:06:52,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:06:52,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:52,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:52,789 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:52,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-07 01:06:54,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:06:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:06:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:06:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:54,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:54,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005428821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:54,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108957538] [2021-11-07 01:06:54,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:06:54,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:06:54,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:06:54,591 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:06:54,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 01:06:55,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:06:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:06:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:06:55,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:56,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108957538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:56,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:06:56,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 19 [2021-11-07 01:06:56,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755748016] [2021-11-07 01:06:56,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:06:56,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:06:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:06:56,540 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:56,966 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2021-11-07 01:06:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:06:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 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 36 [2021-11-07 01:06:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:56,967 INFO L225 Difference]: With dead ends: 114 [2021-11-07 01:06:56,967 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 01:06:56,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:06:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 01:06:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-11-07 01:06:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.17) internal successors, (117), 107 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2021-11-07 01:06:56,970 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 36 [2021-11-07 01:06:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:56,970 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2021-11-07 01:06:56,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2021-11-07 01:06:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:06:56,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:56,971 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:56,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:57,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-07 01:06:57,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:57,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:57,576 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-07 01:06:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:57,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1310351009, now seen corresponding path program 2 times [2021-11-07 01:06:57,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:57,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415347230] [2021-11-07 01:06:57,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:06:57,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:57,578 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-07 01:06:58,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:06:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:06:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:06:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:58,772 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 6 treesize of output 5 [2021-11-07 01:06:58,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:06:58,863 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 16 treesize of output 16 [2021-11-07 01:06:58,954 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 20 treesize of output 16 [2021-11-07 01:06:59,096 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:06:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-07 01:06:59,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 01:07:00,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:00,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-07 01:07:00,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:07:00,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-07 01:07:00,416 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-07 01:07:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 55 [2021-11-07 01:07:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:25,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_250| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_250| (_ bv0 1)) (let ((.cse0 (bvmul c_ULTIMATE.start_entry_point_~i~0 (_ bv4 32)))) (select (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~array~0.base) (bvadd c_ULTIMATE.start_entry_point_~array~0.offset .cse0) |v_ULTIMATE.start_ldv_malloc_#res.base_250|) (bvadd (_ bv4294967292 32) c_ULTIMATE.start_entry_point_~array~0.offset .cse0))) (_ bv0 1)) c_ULTIMATE.start_entry_point_~array~0.base))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_250|))))))) is different from false [2021-11-07 01:07:28,023 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_250| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_250| (_ bv0 1)) (let ((.cse0 (bvmul c_ULTIMATE.start_entry_point_~i~0 (_ bv4 32)))) (select (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~array~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_entry_point_~array~0.offset .cse0) |v_ULTIMATE.start_ldv_malloc_#res.base_250|) (bvadd c_ULTIMATE.start_entry_point_~array~0.offset .cse0))) (_ bv0 1)) c_ULTIMATE.start_entry_point_~array~0.base)))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_250|))))))) is different from false [2021-11-07 01:07:28,051 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 69 treesize of output 67 [2021-11-07 01:07:28,080 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 01:07:28,080 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 101 treesize of output 96 [2021-11-07 01:07:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-07 01:07:28,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:28,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415347230] [2021-11-07 01:07:28,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415347230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:07:28,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069194270] [2021-11-07 01:07:28,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:07:28,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:07:28,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:07:28,344 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:07:28,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-07 01:07:30,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:07:30,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061875588] [2021-11-07 01:07:30,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:07:30,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:07:30,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:07:30,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 1 [2021-11-07 01:07:30,076 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:07:30,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6023303-a1e2-49eb-a5f0-73ff370003c8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 01:07:31,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:07:31,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:07:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:07:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:31,818 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 6 treesize of output 5 [2021-11-07 01:07:31,871 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:07:31,871 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 16 treesize of output 16 [2021-11-07 01:07:31,940 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 20 treesize of output 16 [2021-11-07 01:07:32,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:32,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-07 01:07:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:32,535 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 18 treesize of output 8 [2021-11-07 01:07:32,672 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:07:32,672 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 21 treesize of output 26 [2021-11-07 01:07:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:33,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:35,361 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 31 treesize of output 27 [2021-11-07 01:07:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061875588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:07:37,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:07:37,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15, 15] total 53 [2021-11-07 01:07:37,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110698793] [2021-11-07 01:07:37,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 01:07:37,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 01:07:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2234, Unknown=13, NotChecked=202, Total=2862 [2021-11-07 01:07:37,322 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand has 54 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)