./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/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_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:12:00,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:12:00,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:12:00,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:12:00,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:12:00,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:12:00,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:12:00,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:12:00,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:12:00,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:12:00,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:12:00,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:12:00,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:12:00,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:12:00,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:12:00,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:12:00,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:12:00,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:12:00,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:12:00,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:12:00,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:12:00,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:12:00,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:12:00,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:12:00,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:12:00,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:12:00,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:12:00,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:12:00,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:12:00,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:12:00,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:12:00,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:12:00,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:12:00,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:12:00,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:12:00,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:12:00,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:12:00,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:12:00,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:12:00,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:12:00,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:12:00,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:12:00,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:12:00,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:12:00,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:12:00,522 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:12:00,523 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:12:00,523 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:12:00,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:12:00,523 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:12:00,524 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:12:00,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:12:00,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:12:00,532 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:12:00,532 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:12:00,532 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:12:00,532 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:12:00,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:12:00,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:12:00,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:12:00,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:12:00,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:12:00,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:12:00,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:12:00,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:12:00,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:12:00,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:12:00,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:12:00,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:12:00,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:12:00,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:12:00,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:12:00,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:00,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:12:00,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:12:00,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:12:00,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:12:00,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:12:00,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:12:00,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:12:00,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:12:00,542 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_7c85a30f-849b-4242-b778-a52a790ddf84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2021-11-07 01:12:00,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:12:00,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:12:00,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:12:00,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:12:00,889 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:12:00,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2021-11-07 01:12:00,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/f52a26d37/f4ca43db06cc4ea7a6f1cae136c1d23c/FLAGcdbc14bb5 [2021-11-07 01:12:01,456 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:12:01,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2021-11-07 01:12:01,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/f52a26d37/f4ca43db06cc4ea7a6f1cae136c1d23c/FLAGcdbc14bb5 [2021-11-07 01:12:01,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/f52a26d37/f4ca43db06cc4ea7a6f1cae136c1d23c [2021-11-07 01:12:01,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:12:01,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:12:01,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:01,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:12:01,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:12:01,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:01" (1/1) ... [2021-11-07 01:12:01,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e54ed3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:01, skipping insertion in model container [2021-11-07 01:12:01,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:01" (1/1) ... [2021-11-07 01:12:01,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:12:01,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:12:02,122 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2021-11-07 01:12:02,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:02,142 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 01:12:02,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d82d40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:02, skipping insertion in model container [2021-11-07 01:12:02,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:02,143 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:12:02,146 INFO L168 Benchmark]: Toolchain (without parser) took 296.10 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 82.2 MB in the beginning and 110.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:12:02,147 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory is still 65.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:12:02,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.04 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 82.2 MB in the beginning and 110.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:12:02,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory is still 65.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.04 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 82.2 MB in the beginning and 110.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/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_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:12:04,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:12:04,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:12:04,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:12:04,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:12:04,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:12:04,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:12:04,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:12:04,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:12:04,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:12:04,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:12:04,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:12:04,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:12:04,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:12:04,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:12:04,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:12:04,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:12:04,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:12:04,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:12:04,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:12:04,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:12:04,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:12:04,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:12:04,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:12:04,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:12:04,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:12:04,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:12:04,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:12:04,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:12:04,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:12:04,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:12:04,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:12:04,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:12:04,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:12:04,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:12:04,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:12:04,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:12:04,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:12:04,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:12:04,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:12:04,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:12:04,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:12:04,986 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:12:04,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:12:04,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:12:04,989 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:12:04,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:12:04,989 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:12:04,990 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:12:04,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:12:04,990 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:12:04,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:12:04,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:12:04,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:12:04,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:12:04,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:12:04,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:12:04,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:12:04,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:12:04,996 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:12:04,996 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:12:04,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:12:04,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:12:04,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:12:04,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:12:04,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:12:04,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:12:04,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:12:04,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:04,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:12:04,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:12:04,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:12:05,000 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:12:05,000 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:05,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:12:05,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:12:05,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:12:05,002 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_7c85a30f-849b-4242-b778-a52a790ddf84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2021-11-07 01:12:05,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:12:05,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:12:05,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:12:05,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:12:05,416 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:12:05,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2021-11-07 01:12:05,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/5946975c5/8d76c6703afd46369aa563011a91868f/FLAGe8de9ab82 [2021-11-07 01:12:06,075 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:12:06,077 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2021-11-07 01:12:06,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/5946975c5/8d76c6703afd46369aa563011a91868f/FLAGe8de9ab82 [2021-11-07 01:12:06,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/data/5946975c5/8d76c6703afd46369aa563011a91868f [2021-11-07 01:12:06,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:12:06,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:12:06,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:06,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:12:06,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:12:06,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:06,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205d7323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06, skipping insertion in model container [2021-11-07 01:12:06,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:06,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:12:06,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:12:06,707 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2021-11-07 01:12:06,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:06,729 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:12:06,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:12:06,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2021-11-07 01:12:06,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:06,815 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:12:06,866 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2021-11-07 01:12:06,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:06,888 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:12:06,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06 WrapperNode [2021-11-07 01:12:06,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:06,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:06,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:12:06,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:12:06,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:06,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:06,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:06,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:12:06,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:12:06,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:12:06,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:06,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:12:07,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:12:07,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:12:07,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:12:07,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (1/1) ... [2021-11-07 01:12:07,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:07,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:12:07,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:12:07,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 01:12:07,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 01:12:07,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 01:12:07,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 01:12:07,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:12:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:12:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:12:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:12:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:12:07,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:12:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:12:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:12:07,130 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 01:12:07,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:12:07,900 INFO L299 CfgBuilder]: Removed 37 assume(true) statements. [2021-11-07 01:12:07,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:07 BoogieIcfgContainer [2021-11-07 01:12:07,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:12:07,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:12:07,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:12:07,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:12:07,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:12:06" (1/3) ... [2021-11-07 01:12:07,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59785453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:07, skipping insertion in model container [2021-11-07 01:12:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:06" (2/3) ... [2021-11-07 01:12:07,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59785453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:07, skipping insertion in model container [2021-11-07 01:12:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:07" (3/3) ... [2021-11-07 01:12:07,912 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2021-11-07 01:12:07,918 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:12:07,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:12:07,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:12:07,919 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:12:07,970 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,970 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,971 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,971 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,971 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,971 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,973 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,973 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,973 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,974 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,974 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,974 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,974 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,975 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,976 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,977 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,977 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,977 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,978 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,978 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,980 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,981 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,981 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,981 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,981 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,981 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,982 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,982 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,982 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,982 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,983 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,988 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,988 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,989 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,989 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,989 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,990 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,990 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,990 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,991 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,991 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,992 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,992 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,993 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,993 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,993 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,993 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,994 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,995 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,996 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,997 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,997 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,997 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,998 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,998 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:07,999 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,000 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,000 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,004 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,005 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,005 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,005 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,006 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,007 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,007 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,008 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,008 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,014 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,015 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,015 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,015 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,017 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,018 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,019 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,019 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,020 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,020 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,020 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,020 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,021 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,021 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,021 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,021 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,021 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,022 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,022 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,022 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,022 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,022 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,023 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,023 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,023 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,023 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,024 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,024 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,024 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,024 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,024 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,025 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,025 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,025 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,025 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,026 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,026 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,027 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,027 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,027 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,028 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,028 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,028 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,029 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,029 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,029 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,029 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,029 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,030 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,030 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,030 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,030 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,030 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,030 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,031 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,041 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,042 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,042 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,042 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,042 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,043 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,043 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,043 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,044 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,044 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,044 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,047 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,047 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,047 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,047 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,048 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,050 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,050 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,050 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,050 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,050 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,051 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,051 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,052 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,052 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,052 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,052 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,052 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,053 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,053 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,053 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,053 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,053 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,055 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,059 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,060 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,061 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,061 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,066 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,068 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,071 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,071 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,071 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,071 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,071 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,071 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,075 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,076 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,076 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,076 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,078 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,078 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,079 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,079 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,079 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,079 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,079 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,080 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,080 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,080 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,080 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,080 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,081 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,081 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,082 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,083 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,084 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,086 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,086 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,086 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,086 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,086 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,087 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,087 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,087 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,087 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,088 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,088 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,088 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,089 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,089 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,090 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,093 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,093 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,093 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,093 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post22| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,094 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,096 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,097 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,102 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,102 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,102 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,102 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,103 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,103 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,103 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:12:08,108 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-07 01:12:08,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:12:08,159 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:12:08,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 01:12:08,181 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:12:08,192 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 233 transitions, 482 flow [2021-11-07 01:12:08,195 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 233 transitions, 482 flow [2021-11-07 01:12:08,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 233 transitions, 482 flow [2021-11-07 01:12:08,308 INFO L129 PetriNetUnfolder]: 24/231 cut-off events. [2021-11-07 01:12:08,308 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 01:12:08,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 231 events. 24/231 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 450 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2021-11-07 01:12:08,325 INFO L116 LiptonReduction]: Number of co-enabled transitions 6180 [2021-11-07 01:12:44,345 INFO L131 LiptonReduction]: Checked pairs total: 6158 [2021-11-07 01:12:44,345 INFO L133 LiptonReduction]: Total number of compositions: 283 [2021-11-07 01:12:44,352 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 20 transitions, 56 flow [2021-11-07 01:12:44,364 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:12:44,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:44,374 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:44,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash -523421712, now seen corresponding path program 1 times [2021-11-07 01:12:44,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:44,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037649659] [2021-11-07 01:12:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:44,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:44,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:44,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:12:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:12:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:44,773 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 01:12:44,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:44,817 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 01:12:44,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:44,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037649659] [2021-11-07 01:12:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037649659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:44,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:44,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:12:44,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585687240] [2021-11-07 01:12:44,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:12:44,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:12:44,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:44,843 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 01:12:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:44,886 INFO L93 Difference]: Finished difference Result 36 states and 76 transitions. [2021-11-07 01:12:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 14 [2021-11-07 01:12:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:44,898 INFO L225 Difference]: With dead ends: 36 [2021-11-07 01:12:44,899 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 01:12:44,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 01:12:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 01:12:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 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 01:12:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 76 transitions. [2021-11-07 01:12:44,935 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 76 transitions. Word has length 14 [2021-11-07 01:12:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:44,935 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 76 transitions. [2021-11-07 01:12:44,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 01:12:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 76 transitions. [2021-11-07 01:12:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:12:44,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:44,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:44,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:45,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:45,151 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1630738198, now seen corresponding path program 1 times [2021-11-07 01:12:45,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:45,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333263038] [2021-11-07 01:12:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:45,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:45,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:45,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:45,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:12:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:45,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:45,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:45,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:45,754 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:45,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:12:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:46,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:46,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333263038] [2021-11-07 01:12:46,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333263038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:46,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:46,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:12:46,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943846579] [2021-11-07 01:12:46,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:12:46,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:12:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:46,058 INFO L87 Difference]: Start difference. First operand 36 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:12:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:47,280 INFO L93 Difference]: Finished difference Result 136 states and 286 transitions. [2021-11-07 01:12:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:12:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:12:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:47,287 INFO L225 Difference]: With dead ends: 136 [2021-11-07 01:12:47,287 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 01:12:47,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 01:12:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 58. [2021-11-07 01:12:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.508771929824561) internal successors, (143), 57 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 01:12:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2021-11-07 01:12:47,301 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 15 [2021-11-07 01:12:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:47,302 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2021-11-07 01:12:47,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:12:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2021-11-07 01:12:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:12:47,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:47,304 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:47,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:47,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:47,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1695529992, now seen corresponding path program 2 times [2021-11-07 01:12:47,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:47,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878063884] [2021-11-07 01:12:47,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:12:47,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:47,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:47,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:12:47,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:12:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:48,303 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:12:48,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:12:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:48,721 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:12:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:49,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:49,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878063884] [2021-11-07 01:12:49,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878063884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:49,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:49,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:12:49,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813967621] [2021-11-07 01:12:49,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:12:49,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:12:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:49,071 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:50,459 INFO L93 Difference]: Finished difference Result 140 states and 288 transitions. [2021-11-07 01:12:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:12:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:12:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:50,465 INFO L225 Difference]: With dead ends: 140 [2021-11-07 01:12:50,466 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 01:12:50,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:12:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 01:12:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 62. [2021-11-07 01:12:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.442622950819672) internal successors, (149), 61 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 01:12:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2021-11-07 01:12:50,479 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 15 [2021-11-07 01:12:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2021-11-07 01:12:50,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2021-11-07 01:12:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:12:50,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:50,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:50,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:50,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:50,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -134886668, now seen corresponding path program 3 times [2021-11-07 01:12:50,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:50,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128849344] [2021-11-07 01:12:50,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:12:50,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:50,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:50,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:12:50,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-07 01:12:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:51,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:51,227 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:51,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:12:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:51,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:51,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128849344] [2021-11-07 01:12:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128849344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:51,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:51,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:12:51,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563594966] [2021-11-07 01:12:51,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:12:51,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:51,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:12:51,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:51,407 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:12:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:52,102 INFO L93 Difference]: Finished difference Result 150 states and 338 transitions. [2021-11-07 01:12:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:12:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:12:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:52,105 INFO L225 Difference]: With dead ends: 150 [2021-11-07 01:12:52,105 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 01:12:52,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:12:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 01:12:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 74. [2021-11-07 01:12:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.287671232876712) internal successors, (167), 73 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 01:12:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 167 transitions. [2021-11-07 01:12:52,118 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 167 transitions. Word has length 15 [2021-11-07 01:12:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:52,119 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 167 transitions. [2021-11-07 01:12:52,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:12:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 167 transitions. [2021-11-07 01:12:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:12:52,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:52,121 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:52,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:12:52,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:52,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash 114538342, now seen corresponding path program 4 times [2021-11-07 01:12:52,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:52,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117976511] [2021-11-07 01:12:52,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:12:52,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:52,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:52,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:12:52,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:12:52,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:52,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:52,842 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:52,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:12:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:53,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:53,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117976511] [2021-11-07 01:12:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117976511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:53,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:53,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:12:53,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118640349] [2021-11-07 01:12:53,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:12:53,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:12:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:53,123 INFO L87 Difference]: Start difference. First operand 74 states and 167 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:54,633 INFO L93 Difference]: Finished difference Result 138 states and 322 transitions. [2021-11-07 01:12:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:12:54,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:12:54,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:54,637 INFO L225 Difference]: With dead ends: 138 [2021-11-07 01:12:54,637 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 01:12:54,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 01:12:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2021-11-07 01:12:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 83 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 01:12:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2021-11-07 01:12:54,648 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 15 [2021-11-07 01:12:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:54,648 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2021-11-07 01:12:54,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2021-11-07 01:12:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:12:54,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:54,650 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:54,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:54,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:54,862 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash 179330136, now seen corresponding path program 5 times [2021-11-07 01:12:54,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:54,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370770576] [2021-11-07 01:12:54,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:12:54,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:54,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:54,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:54,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:12:55,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:12:55,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:55,518 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:12:55,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:12:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:55,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:55,833 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:55,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:12:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:56,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:56,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370770576] [2021-11-07 01:12:56,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370770576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:56,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:56,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:12:56,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586788795] [2021-11-07 01:12:56,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:12:56,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:12:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:56,053 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 01:12:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:56,690 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-11-07 01:12:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:12:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 15 [2021-11-07 01:12:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:56,694 INFO L225 Difference]: With dead ends: 150 [2021-11-07 01:12:56,694 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 01:12:56,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 01:12:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 82. [2021-11-07 01:12:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.45679012345679) internal successors, (199), 81 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 01:12:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2021-11-07 01:12:56,705 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 15 [2021-11-07 01:12:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:56,706 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2021-11-07 01:12:56,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 01:12:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2021-11-07 01:12:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:12:56,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:56,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:56,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:56,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:56,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1865863164, now seen corresponding path program 6 times [2021-11-07 01:12:56,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:56,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000489890] [2021-11-07 01:12:56,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:12:56,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:56,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:56,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:12:57,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-11-07 01:12:57,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:12:57,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:57,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:57,559 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:12:57,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:12:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:57,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:57,875 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:57,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:12:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:57,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:57,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000489890] [2021-11-07 01:12:57,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000489890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:57,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:57,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:12:57,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644108112] [2021-11-07 01:12:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:12:57,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:12:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:12:57,976 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 01:12:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:58,605 INFO L93 Difference]: Finished difference Result 140 states and 329 transitions. [2021-11-07 01:12:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:12:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 15 [2021-11-07 01:12:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:58,607 INFO L225 Difference]: With dead ends: 140 [2021-11-07 01:12:58,607 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 01:12:58,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:12:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 01:12:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 86. [2021-11-07 01:12:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.411764705882353) internal successors, (205), 85 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 01:12:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 205 transitions. [2021-11-07 01:12:58,618 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 205 transitions. Word has length 15 [2021-11-07 01:12:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:58,618 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 205 transitions. [2021-11-07 01:12:58,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 01:12:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 205 transitions. [2021-11-07 01:12:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:12:58,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:58,621 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:58,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:58,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:58,835 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:12:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -973050858, now seen corresponding path program 1 times [2021-11-07 01:12:58,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:58,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635083604] [2021-11-07 01:12:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:58,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:58,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:58,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:12:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:59,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:12:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:59,451 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:12:59,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:12:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:12:59,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:59,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635083604] [2021-11-07 01:12:59,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635083604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:59,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2050293932] [2021-11-07 01:12:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:59,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:59,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:59,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:59,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:13:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:00,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:00,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:00,629 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:00,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:00,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2050293932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:00,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734023379] [2021-11-07 01:13:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:00,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:00,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:00,836 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:00,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:13:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:01,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:01,435 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:01,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:01,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734023379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:01,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:01,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:01,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224808721] [2021-11-07 01:13:01,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:01,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:01,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:01,603 INFO L87 Difference]: Start difference. First operand 86 states and 205 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:06,805 INFO L93 Difference]: Finished difference Result 242 states and 547 transitions. [2021-11-07 01:13:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:13:06,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:13:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:06,810 INFO L225 Difference]: With dead ends: 242 [2021-11-07 01:13:06,810 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 01:13:06,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:13:06,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 01:13:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 102. [2021-11-07 01:13:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.742574257425743) internal successors, (277), 101 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 01:13:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 277 transitions. [2021-11-07 01:13:06,822 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 277 transitions. Word has length 17 [2021-11-07 01:13:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:06,822 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 277 transitions. [2021-11-07 01:13:06,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 277 transitions. [2021-11-07 01:13:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:06,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:06,824 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:06,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 01:13:07,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-07 01:13:07,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:07,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:07,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash -908259064, now seen corresponding path program 2 times [2021-11-07 01:13:07,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:07,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952540043] [2021-11-07 01:13:07,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:13:07,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:07,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:07,432 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:07,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:13:07,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:13:07,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:07,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:08,374 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:08,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:08,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:08,798 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:08,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:13:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:09,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:09,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952540043] [2021-11-07 01:13:09,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952540043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:09,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789675423] [2021-11-07 01:13:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:13:09,419 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:09,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:09,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:13:09,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:13:09,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:10,696 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:10,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:10,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:11,008 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:11,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:13:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:11,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [789675423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:11,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320348801] [2021-11-07 01:13:11,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:13:11,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:11,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:11,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 01:13:11,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:13:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:12,185 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:12,460 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:12,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:13:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:12,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320348801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:12,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:12,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:12,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019406973] [2021-11-07 01:13:12,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:12,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:12,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:12,657 INFO L87 Difference]: Start difference. First operand 102 states and 277 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:17,242 INFO L93 Difference]: Finished difference Result 232 states and 524 transitions. [2021-11-07 01:13:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:13:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:13:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:17,247 INFO L225 Difference]: With dead ends: 232 [2021-11-07 01:13:17,247 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 01:13:17,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:13:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 01:13:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 96. [2021-11-07 01:13:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.6315789473684212) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 01:13:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 250 transitions. [2021-11-07 01:13:17,257 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 250 transitions. Word has length 17 [2021-11-07 01:13:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 250 transitions. [2021-11-07 01:13:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 250 transitions. [2021-11-07 01:13:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:17,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:17,260 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:17,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:17,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-07 01:13:17,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:13:17,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:17,876 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -512794854, now seen corresponding path program 3 times [2021-11-07 01:13:17,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:17,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119245497] [2021-11-07 01:13:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:13:17,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:17,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:13:18,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:13:18,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:18,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:18,623 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:18,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:19,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:19,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119245497] [2021-11-07 01:13:19,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119245497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:19,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653984855] [2021-11-07 01:13:19,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:13:19,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:19,078 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:19,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 01:13:19,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:13:19,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:19,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:19,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:19,930 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:20,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653984855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:20,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175307545] [2021-11-07 01:13:20,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:13:20,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:20,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:20,069 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:20,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 01:13:20,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:13:20,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:20,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:20,773 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:20,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:20,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175307545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:20,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:20,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:20,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063584456] [2021-11-07 01:13:20,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:20,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:20,950 INFO L87 Difference]: Start difference. First operand 96 states and 250 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:24,428 INFO L93 Difference]: Finished difference Result 220 states and 505 transitions. [2021-11-07 01:13:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:13:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:13:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:24,434 INFO L225 Difference]: With dead ends: 220 [2021-11-07 01:13:24,434 INFO L226 Difference]: Without dead ends: 220 [2021-11-07 01:13:24,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:13:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-07 01:13:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 108. [2021-11-07 01:13:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.635514018691589) internal successors, (282), 107 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 01:13:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 282 transitions. [2021-11-07 01:13:24,445 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 282 transitions. Word has length 17 [2021-11-07 01:13:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:24,446 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 282 transitions. [2021-11-07 01:13:24,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 282 transitions. [2021-11-07 01:13:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:24,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:24,448 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:24,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:13:24,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-07 01:13:24,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:25,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:25,064 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 870239382, now seen corresponding path program 4 times [2021-11-07 01:13:25,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:25,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43659317] [2021-11-07 01:13:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:13:25,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:25,066 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:25,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:13:25,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:13:25,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:25,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:25,823 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:25,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:26,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:26,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43659317] [2021-11-07 01:13:26,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43659317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:26,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104991125] [2021-11-07 01:13:26,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:13:26,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:26,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:26,147 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:26,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:13:26,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:13:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:26,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:26,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:26,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:26,965 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:27,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104991125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:27,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658045638] [2021-11-07 01:13:27,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:13:27,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:27,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:27,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 01:13:27,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:13:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:27,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:27,826 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:27,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:27,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658045638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:27,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:27,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:27,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153447801] [2021-11-07 01:13:27,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:27,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:27,990 INFO L87 Difference]: Start difference. First operand 108 states and 282 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:29,335 INFO L93 Difference]: Finished difference Result 206 states and 474 transitions. [2021-11-07 01:13:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:13:29,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:13:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:29,339 INFO L225 Difference]: With dead ends: 206 [2021-11-07 01:13:29,340 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 01:13:29,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:13:29,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 01:13:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 118. [2021-11-07 01:13:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.606837606837607) internal successors, (305), 117 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 01:13:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 305 transitions. [2021-11-07 01:13:29,347 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 305 transitions. Word has length 17 [2021-11-07 01:13:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:29,347 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 305 transitions. [2021-11-07 01:13:29,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 305 transitions. [2021-11-07 01:13:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:29,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:29,349 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:29,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:29,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:29,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-07 01:13:29,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:29,953 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash 897359734, now seen corresponding path program 1 times [2021-11-07 01:13:29,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:29,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754129787] [2021-11-07 01:13:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:29,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:29,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:29,956 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:29,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:13:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:30,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:30,732 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:31,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:31,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754129787] [2021-11-07 01:13:31,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754129787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:31,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [971106203] [2021-11-07 01:13:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:31,138 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:31,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:31,140 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:31,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:13:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:31,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:31,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:31,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:32,050 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:32,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:32,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [971106203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:32,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754674500] [2021-11-07 01:13:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:32,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:32,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:32,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 01:13:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:32,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:32,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:32,938 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:13:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:33,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754674500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:33,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:33,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:33,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737484523] [2021-11-07 01:13:33,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:33,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:33,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:33,090 INFO L87 Difference]: Start difference. First operand 118 states and 305 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:35,608 INFO L93 Difference]: Finished difference Result 240 states and 568 transitions. [2021-11-07 01:13:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:13:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:13:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:35,613 INFO L225 Difference]: With dead ends: 240 [2021-11-07 01:13:35,613 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 01:13:35,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:13:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 01:13:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 132. [2021-11-07 01:13:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 01:13:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-11-07 01:13:35,621 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 17 [2021-11-07 01:13:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:35,621 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-11-07 01:13:35,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-11-07 01:13:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:35,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:35,623 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:35,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:35,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:36,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:36,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:36,237 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash 962151528, now seen corresponding path program 2 times [2021-11-07 01:13:36,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:36,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074086679] [2021-11-07 01:13:36,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:13:36,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:36,239 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:36,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:13:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:13:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:37,548 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:37,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:37,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:37,775 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:37,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:13:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:38,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:38,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074086679] [2021-11-07 01:13:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074086679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:38,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062325011] [2021-11-07 01:13:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:13:38,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:38,249 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:38,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:13:38,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:13:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:39,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:39,553 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:39,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:39,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:39,801 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:39,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:13:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:40,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1062325011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:40,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685277184] [2021-11-07 01:13:40,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:13:40,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:40,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:40,039 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:40,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 01:13:40,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:13:40,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:40,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:41,120 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:41,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:41,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:41,353 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:41,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:13:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:41,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685277184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:41,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:41,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:41,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001305871] [2021-11-07 01:13:41,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:41,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:41,604 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:44,313 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2021-11-07 01:13:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:13:44,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:13:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:44,318 INFO L225 Difference]: With dead ends: 252 [2021-11-07 01:13:44,318 INFO L226 Difference]: Without dead ends: 252 [2021-11-07 01:13:44,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:13:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-07 01:13:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 128. [2021-11-07 01:13:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.7559055118110236) internal successors, (350), 127 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 01:13:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 350 transitions. [2021-11-07 01:13:44,326 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 350 transitions. Word has length 17 [2021-11-07 01:13:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:44,326 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 350 transitions. [2021-11-07 01:13:44,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 350 transitions. [2021-11-07 01:13:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:44,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:44,328 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:44,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:44,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:44,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:44,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:44,943 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:44,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:44,943 INFO L85 PathProgramCache]: Analyzing trace with hash 100898414, now seen corresponding path program 3 times [2021-11-07 01:13:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:44,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900955563] [2021-11-07 01:13:44,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:13:44,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:44,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:44,945 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:44,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:13:45,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:13:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:45,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:46,046 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:46,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:46,309 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:46,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:13:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:46,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:46,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900955563] [2021-11-07 01:13:46,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900955563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:46,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1958499412] [2021-11-07 01:13:46,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:13:46,854 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:46,854 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:46,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:13:47,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:13:47,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:48,220 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:48,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:48,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:48,433 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:13:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:48,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1958499412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:48,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667602491] [2021-11-07 01:13:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:13:48,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:48,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:48,678 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:48,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 01:13:49,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:13:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:49,941 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:50,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:50,202 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:50,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:13:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:50,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667602491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:50,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:50,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:50,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144944621] [2021-11-07 01:13:50,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:50,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:50,455 INFO L87 Difference]: Start difference. First operand 128 states and 350 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:52,621 INFO L93 Difference]: Finished difference Result 268 states and 612 transitions. [2021-11-07 01:13:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:13:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:13:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:52,624 INFO L225 Difference]: With dead ends: 268 [2021-11-07 01:13:52,624 INFO L226 Difference]: Without dead ends: 268 [2021-11-07 01:13:52,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:13:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-07 01:13:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 134. [2021-11-07 01:13:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 01:13:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-11-07 01:13:52,633 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 17 [2021-11-07 01:13:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:52,633 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-11-07 01:13:52,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-11-07 01:13:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:52,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:52,635 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:52,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:52,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:53,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:53,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:53,252 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:13:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash -828144344, now seen corresponding path program 4 times [2021-11-07 01:13:53,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:53,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742295504] [2021-11-07 01:13:53,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:13:53,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:53,253 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:53,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:13:53,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:13:53,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:53,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:54,266 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:54,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:54,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:54,581 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:54,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:13:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:55,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:55,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742295504] [2021-11-07 01:13:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742295504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:55,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753605996] [2021-11-07 01:13:55,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:13:55,013 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:55,015 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:55,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:13:55,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:13:55,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:55,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:55,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:56,409 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:56,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:56,734 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:56,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:13:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:56,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753605996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:56,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023345010] [2021-11-07 01:13:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:13:56,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:13:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:56,952 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:13:56,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 01:13:57,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:13:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:13:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:13:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:58,041 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:13:58,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:13:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:58,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:58,254 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:13:58,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:13:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:13:58,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023345010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:58,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:13:58,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:13:58,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898585806] [2021-11-07 01:13:58,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:13:58,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:13:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:13:58,458 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:59,980 INFO L93 Difference]: Finished difference Result 242 states and 572 transitions. [2021-11-07 01:13:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:13:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:13:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:59,984 INFO L225 Difference]: With dead ends: 242 [2021-11-07 01:13:59,984 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 01:13:59,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:13:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 01:13:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 138. [2021-11-07 01:13:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.7226277372262775) internal successors, (373), 137 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 01:13:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 373 transitions. [2021-11-07 01:13:59,993 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 373 transitions. Word has length 17 [2021-11-07 01:13:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:59,994 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 373 transitions. [2021-11-07 01:13:59,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:13:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 373 transitions. [2021-11-07 01:13:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:13:59,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:59,995 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:00,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:00,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:00,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:00,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:00,596 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash -766739404, now seen corresponding path program 5 times [2021-11-07 01:14:00,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:00,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25662093] [2021-11-07 01:14:00,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:14:00,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:00,599 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:00,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:14:01,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:01,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:01,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:01,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:01,644 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:01,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:01,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:01,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25662093] [2021-11-07 01:14:01,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25662093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:01,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885346047] [2021-11-07 01:14:01,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:14:01,862 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:01,863 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:14:02,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:02,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:02,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:03,084 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:03,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:03,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885346047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:03,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695832752] [2021-11-07 01:14:03,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:14:03,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:03,313 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:03,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 01:14:04,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:04,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:04,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:04,377 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:04,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:04,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695832752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:04,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:04,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144263743] [2021-11-07 01:14:04,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:04,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:04,511 INFO L87 Difference]: Start difference. First operand 138 states and 373 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:05,623 INFO L93 Difference]: Finished difference Result 244 states and 578 transitions. [2021-11-07 01:14:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:14:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:14:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:05,637 INFO L225 Difference]: With dead ends: 244 [2021-11-07 01:14:05,637 INFO L226 Difference]: Without dead ends: 244 [2021-11-07 01:14:05,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:14:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-07 01:14:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 138. [2021-11-07 01:14:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.7226277372262775) internal successors, (373), 137 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 01:14:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 373 transitions. [2021-11-07 01:14:05,645 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 373 transitions. Word has length 17 [2021-11-07 01:14:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:05,646 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 373 transitions. [2021-11-07 01:14:05,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 373 transitions. [2021-11-07 01:14:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:05,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:05,647 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:05,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:05,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:06,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:06,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:06,261 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1845265180, now seen corresponding path program 5 times [2021-11-07 01:14:06,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:06,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320853314] [2021-11-07 01:14:06,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:14:06,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:06,263 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:06,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:14:06,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:06,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:06,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:07,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:07,356 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:07,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:07,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320853314] [2021-11-07 01:14:07,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320853314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:07,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193082947] [2021-11-07 01:14:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:14:07,776 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:07,777 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:07,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:14:08,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:08,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:08,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:09,061 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:09,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [193082947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:09,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008545528] [2021-11-07 01:14:09,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:14:09,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:09,303 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:09,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 01:14:10,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:10,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:10,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:10,438 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:10,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008545528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:10,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:10,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384972189] [2021-11-07 01:14:10,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:10,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:10,585 INFO L87 Difference]: Start difference. First operand 138 states and 373 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:13,670 INFO L93 Difference]: Finished difference Result 294 states and 706 transitions. [2021-11-07 01:14:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:14:13,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:14:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:13,679 INFO L225 Difference]: With dead ends: 294 [2021-11-07 01:14:13,679 INFO L226 Difference]: Without dead ends: 294 [2021-11-07 01:14:13,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:14:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-07 01:14:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 150. [2021-11-07 01:14:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8322147651006713) internal successors, (422), 149 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 01:14:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 422 transitions. [2021-11-07 01:14:13,689 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 422 transitions. Word has length 17 [2021-11-07 01:14:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:13,689 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 422 transitions. [2021-11-07 01:14:13,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 422 transitions. [2021-11-07 01:14:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:13,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:13,691 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:13,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:13,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:14,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:14,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:14,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1910056974, now seen corresponding path program 6 times [2021-11-07 01:14:14,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:14,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377591064] [2021-11-07 01:14:14,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:14:14,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:14,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:14,312 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:14,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:14:15,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:14:15,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:15,838 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:15,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:15,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:16,096 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:16,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:14:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:16,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:16,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377591064] [2021-11-07 01:14:16,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377591064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:16,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757708730] [2021-11-07 01:14:16,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:14:16,616 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:16,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:16,627 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:16,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:14:17,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:14:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:19,031 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:19,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:19,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:19,234 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:19,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:14:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:19,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757708730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:19,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860510332] [2021-11-07 01:14:19,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:14:19,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:19,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:19,592 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:19,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 01:14:20,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:14:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:20,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:20,823 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:20,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:20,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:21,038 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:21,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:14:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:21,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860510332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:21,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:21,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:21,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994189435] [2021-11-07 01:14:21,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:21,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:21,279 INFO L87 Difference]: Start difference. First operand 150 states and 422 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:14:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:24,197 INFO L93 Difference]: Finished difference Result 294 states and 702 transitions. [2021-11-07 01:14:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:14:24,200 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:14:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:24,205 INFO L225 Difference]: With dead ends: 294 [2021-11-07 01:14:24,205 INFO L226 Difference]: Without dead ends: 294 [2021-11-07 01:14:24,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:14:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-07 01:14:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 144. [2021-11-07 01:14:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.762237762237762) internal successors, (395), 143 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 01:14:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 395 transitions. [2021-11-07 01:14:24,214 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 395 transitions. Word has length 17 [2021-11-07 01:14:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:24,214 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 395 transitions. [2021-11-07 01:14:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:14:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 395 transitions. [2021-11-07 01:14:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:24,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:24,216 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:24,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:24,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:24,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-07 01:14:24,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:24,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1048803860, now seen corresponding path program 7 times [2021-11-07 01:14:24,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:24,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186980530] [2021-11-07 01:14:24,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:14:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:24,837 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:24,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 01:14:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:25,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:26,400 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:26,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:26,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:26,686 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:26,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:14:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:27,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:27,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186980530] [2021-11-07 01:14:27,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186980530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471123077] [2021-11-07 01:14:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:14:27,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:27,039 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:27,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 01:14:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:28,835 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:28,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:29,070 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:14:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:29,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471123077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:29,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493597116] [2021-11-07 01:14:29,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:14:29,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:29,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:29,316 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:29,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 01:14:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:30,761 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:30,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:31,011 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:31,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:14:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:31,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493597116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:31,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:31,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:31,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114199397] [2021-11-07 01:14:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:31,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:31,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:31,243 INFO L87 Difference]: Start difference. First operand 144 states and 395 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:14:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:33,490 INFO L93 Difference]: Finished difference Result 288 states and 669 transitions. [2021-11-07 01:14:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:14:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:14:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:33,494 INFO L225 Difference]: With dead ends: 288 [2021-11-07 01:14:33,494 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 01:14:33,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:14:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 01:14:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 138. [2021-11-07 01:14:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.72992700729927) internal successors, (374), 137 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 01:14:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 374 transitions. [2021-11-07 01:14:33,504 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 374 transitions. Word has length 17 [2021-11-07 01:14:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 374 transitions. [2021-11-07 01:14:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:14:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 374 transitions. [2021-11-07 01:14:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:33,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:33,506 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:33,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:33,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:33,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-07 01:14:34,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:34,132 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:34,132 INFO L85 PathProgramCache]: Analyzing trace with hash -447895502, now seen corresponding path program 8 times [2021-11-07 01:14:34,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:34,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995082213] [2021-11-07 01:14:34,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:14:34,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:34,134 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:34,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 01:14:35,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:35,424 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:35,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:35,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:35,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995082213] [2021-11-07 01:14:35,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995082213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:35,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [671772968] [2021-11-07 01:14:35,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:14:35,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:35,750 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:35,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 01:14:37,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:37,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:37,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:37,451 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:37,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [671772968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:37,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917850740] [2021-11-07 01:14:37,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:14:37,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:37,598 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:37,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 01:14:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:38,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:38,884 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:38,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917850740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:39,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:39,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457956854] [2021-11-07 01:14:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:39,018 INFO L87 Difference]: Start difference. First operand 138 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:40,769 INFO L93 Difference]: Finished difference Result 312 states and 734 transitions. [2021-11-07 01:14:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:14:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:14:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:40,775 INFO L225 Difference]: With dead ends: 312 [2021-11-07 01:14:40,775 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 01:14:40,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:14:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 01:14:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 146. [2021-11-07 01:14:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.793103448275862) internal successors, (405), 145 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 01:14:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 405 transitions. [2021-11-07 01:14:40,784 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 405 transitions. Word has length 17 [2021-11-07 01:14:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 405 transitions. [2021-11-07 01:14:40,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 405 transitions. [2021-11-07 01:14:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:40,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:40,786 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:40,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-11-07 01:14:41,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:41,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:41,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:41,393 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash -383103708, now seen corresponding path program 9 times [2021-11-07 01:14:41,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:41,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982073232] [2021-11-07 01:14:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:14:41,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:41,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:41,395 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:41,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 01:14:42,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:14:42,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:42,775 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:42,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:42,993 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:42,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:14:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:43,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:43,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982073232] [2021-11-07 01:14:43,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982073232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:43,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [980536552] [2021-11-07 01:14:43,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:14:43,409 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:43,415 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:43,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-07 01:14:44,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:14:44,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:45,310 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:45,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:45,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:45,543 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:45,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:14:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [980536552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:45,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190649801] [2021-11-07 01:14:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:14:45,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:45,852 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:45,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 01:14:46,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:14:46,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:47,419 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:14:47,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:14:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:47,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:47,631 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:47,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:14:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190649801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:47,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:47,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:47,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544445517] [2021-11-07 01:14:47,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:47,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:47,898 INFO L87 Difference]: Start difference. First operand 146 states and 405 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:14:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:50,183 INFO L93 Difference]: Finished difference Result 316 states and 731 transitions. [2021-11-07 01:14:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:14:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:14:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:50,188 INFO L225 Difference]: With dead ends: 316 [2021-11-07 01:14:50,189 INFO L226 Difference]: Without dead ends: 316 [2021-11-07 01:14:50,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:14:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-07 01:14:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 138. [2021-11-07 01:14:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.7226277372262775) internal successors, (373), 137 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 01:14:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 373 transitions. [2021-11-07 01:14:50,198 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 373 transitions. Word has length 17 [2021-11-07 01:14:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:50,199 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 373 transitions. [2021-11-07 01:14:50,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:14:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 373 transitions. [2021-11-07 01:14:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:50,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:50,201 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:50,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:50,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:50,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:50,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:50,808 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1144346860, now seen corresponding path program 10 times [2021-11-07 01:14:50,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:50,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556418848] [2021-11-07 01:14:50,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:14:50,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:50,809 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:50,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-07 01:14:51,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:14:51,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:51,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:52,045 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:52,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:52,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:52,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556418848] [2021-11-07 01:14:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556418848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:52,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [580831434] [2021-11-07 01:14:52,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:14:52,296 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:52,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:52,297 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:52,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-07 01:14:53,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:14:53,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:53,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:53,921 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:53,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:54,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [580831434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:54,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367018747] [2021-11-07 01:14:54,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:14:54,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:54,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:54,091 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:54,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 01:14:55,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:14:55,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:55,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:55,466 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:55,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:55,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367018747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:55,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:55,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:14:55,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822639891] [2021-11-07 01:14:55,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:14:55,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:14:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:14:55,585 INFO L87 Difference]: Start difference. First operand 138 states and 373 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:57,083 INFO L93 Difference]: Finished difference Result 312 states and 738 transitions. [2021-11-07 01:14:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:14:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:14:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:57,085 INFO L225 Difference]: With dead ends: 312 [2021-11-07 01:14:57,086 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 01:14:57,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:14:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 01:14:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 150. [2021-11-07 01:14:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.6241610738255035) internal successors, (391), 149 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 01:14:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 391 transitions. [2021-11-07 01:14:57,093 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 391 transitions. Word has length 17 [2021-11-07 01:14:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:57,094 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 391 transitions. [2021-11-07 01:14:57,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 391 transitions. [2021-11-07 01:14:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:14:57,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:57,095 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:57,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:57,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-07 01:14:57,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 01:14:57,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:57,711 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:14:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1145852774, now seen corresponding path program 6 times [2021-11-07 01:14:57,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:57,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160563499] [2021-11-07 01:14:57,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:14:57,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:57,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:57,713 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:57,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-07 01:14:58,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:14:58,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:59,208 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:14:59,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:14:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:14:59,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:59,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160563499] [2021-11-07 01:14:59,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160563499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:59,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1735808409] [2021-11-07 01:14:59,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:14:59,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:59,468 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:59,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-07 01:15:01,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:15:01,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:01,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:01,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:01,369 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:01,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:15:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:01,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1735808409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:01,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831206086] [2021-11-07 01:15:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:15:01,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:15:01,566 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:15:01,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 01:15:02,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:15:02,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:03,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:03,102 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:03,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:15:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:03,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831206086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:03,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:15:03,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:15:03,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487155445] [2021-11-07 01:15:03,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:15:03,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:15:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:15:03,240 INFO L87 Difference]: Start difference. First operand 150 states and 391 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:15:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:07,256 INFO L93 Difference]: Finished difference Result 352 states and 893 transitions. [2021-11-07 01:15:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:15:07,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:15:07,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:07,262 INFO L225 Difference]: With dead ends: 352 [2021-11-07 01:15:07,262 INFO L226 Difference]: Without dead ends: 352 [2021-11-07 01:15:07,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:15:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-07 01:15:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 170. [2021-11-07 01:15:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.798816568047337) internal successors, (473), 169 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 01:15:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 473 transitions. [2021-11-07 01:15:07,273 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 473 transitions. Word has length 17 [2021-11-07 01:15:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:07,273 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 473 transitions. [2021-11-07 01:15:07,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:15:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 473 transitions. [2021-11-07 01:15:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:15:07,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:07,275 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:07,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:07,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:07,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:07,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:07,876 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:15:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1210644568, now seen corresponding path program 7 times [2021-11-07 01:15:07,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:07,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621103142] [2021-11-07 01:15:07,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:15:07,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:07,879 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:07,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-07 01:15:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:09,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:09,686 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:09,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:09,993 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:09,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:10,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:10,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621103142] [2021-11-07 01:15:10,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621103142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:10,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692316645] [2021-11-07 01:15:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:15:10,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:10,287 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:10,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-07 01:15:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:12,445 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:12,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:12,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:12,818 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:12,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:13,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1692316645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:13,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364095350] [2021-11-07 01:15:13,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:15:13,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:15:13,024 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:15:13,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 01:15:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:14,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:14,929 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:15,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:15,178 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:15,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:15,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364095350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:15,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:15:15,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:15:15,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498636621] [2021-11-07 01:15:15,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:15:15,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:15:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:15:15,342 INFO L87 Difference]: Start difference. First operand 170 states and 473 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:15:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:17,753 INFO L93 Difference]: Finished difference Result 364 states and 906 transitions. [2021-11-07 01:15:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:15:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:15:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:17,757 INFO L225 Difference]: With dead ends: 364 [2021-11-07 01:15:17,757 INFO L226 Difference]: Without dead ends: 364 [2021-11-07 01:15:17,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:15:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-07 01:15:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 166. [2021-11-07 01:15:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.757575757575758) internal successors, (455), 165 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 01:15:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 455 transitions. [2021-11-07 01:15:17,766 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 455 transitions. Word has length 17 [2021-11-07 01:15:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:17,767 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 455 transitions. [2021-11-07 01:15:17,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:15:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 455 transitions. [2021-11-07 01:15:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:15:17,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:17,769 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:17,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:17,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:18,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-07 01:15:18,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:18,388 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:15:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash -834548732, now seen corresponding path program 8 times [2021-11-07 01:15:18,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:18,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868076119] [2021-11-07 01:15:18,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:15:18,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:18,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:18,391 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:18,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-07 01:15:19,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:15:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:20,059 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:20,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:20,379 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:20,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:20,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:20,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868076119] [2021-11-07 01:15:20,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868076119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:20,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1616807773] [2021-11-07 01:15:20,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:15:20,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:20,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:20,548 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:20,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-07 01:15:22,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:15:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:22,919 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:22,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:23,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:23,193 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:23,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:23,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1616807773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:23,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859448594] [2021-11-07 01:15:23,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:15:23,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:23,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:15:23,286 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:15:23,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 01:15:24,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:15:24,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:25,443 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:25,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:25,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:25,727 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:25,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:25,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859448594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:25,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:15:25,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:15:25,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383291922] [2021-11-07 01:15:25,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:15:25,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:15:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:15:25,824 INFO L87 Difference]: Start difference. First operand 166 states and 455 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:15:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:27,786 INFO L93 Difference]: Finished difference Result 366 states and 941 transitions. [2021-11-07 01:15:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:15:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:15:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:27,790 INFO L225 Difference]: With dead ends: 366 [2021-11-07 01:15:27,790 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 01:15:27,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:15:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 01:15:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 166. [2021-11-07 01:15:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.757575757575758) internal successors, (455), 165 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 01:15:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 455 transitions. [2021-11-07 01:15:27,800 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 455 transitions. Word has length 17 [2021-11-07 01:15:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:27,800 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 455 transitions. [2021-11-07 01:15:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:15:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 455 transitions. [2021-11-07 01:15:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:15:27,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:27,802 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:27,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:28,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:28,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:28,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:28,410 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:15:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash 701019538, now seen corresponding path program 9 times [2021-11-07 01:15:28,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:28,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701619112] [2021-11-07 01:15:28,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:15:28,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:28,412 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:28,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-07 01:15:29,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:15:29,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:30,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:30,235 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:15:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:30,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:30,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701619112] [2021-11-07 01:15:30,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701619112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:30,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921034344] [2021-11-07 01:15:30,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:15:30,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:30,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:30,487 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:30,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-07 01:15:32,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:15:32,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:32,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:32,616 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:32,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:15:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1921034344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:32,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964987021] [2021-11-07 01:15:32,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:15:32,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:32,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:15:32,790 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:15:32,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 01:15:34,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:15:34,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:34,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:34,441 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:34,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:15:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964987021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:34,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:15:34,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:15:34,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763435411] [2021-11-07 01:15:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:15:34,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:15:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:15:34,611 INFO L87 Difference]: Start difference. First operand 166 states and 455 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:15:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:38,094 INFO L93 Difference]: Finished difference Result 362 states and 913 transitions. [2021-11-07 01:15:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:15:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:15:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:38,102 INFO L225 Difference]: With dead ends: 362 [2021-11-07 01:15:38,102 INFO L226 Difference]: Without dead ends: 362 [2021-11-07 01:15:38,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:15:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-07 01:15:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 180. [2021-11-07 01:15:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8547486033519553) internal successors, (511), 179 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 01:15:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 511 transitions. [2021-11-07 01:15:38,111 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 511 transitions. Word has length 17 [2021-11-07 01:15:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:38,112 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 511 transitions. [2021-11-07 01:15:38,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:15:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 511 transitions. [2021-11-07 01:15:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:15:38,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:38,113 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:38,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2021-11-07 01:15:38,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:38,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-11-07 01:15:38,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:38,720 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:15:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash -709736165, now seen corresponding path program 1 times [2021-11-07 01:15:38,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:38,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234634967] [2021-11-07 01:15:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:38,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:38,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:38,722 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:38,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-07 01:15:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:40,716 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:40,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:40,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:40,945 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:41,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:41,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234634967] [2021-11-07 01:15:41,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234634967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:41,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835702858] [2021-11-07 01:15:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:41,333 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:41,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:41,334 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:41,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-07 01:15:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:43,879 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:43,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:44,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:44,144 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:44,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:44,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1835702858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:44,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099125037] [2021-11-07 01:15:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:44,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:15:44,382 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:15:44,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 01:15:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:46,390 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:46,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:46,627 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:46,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:15:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:46,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099125037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:46,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:15:46,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:15:46,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287193343] [2021-11-07 01:15:46,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:15:46,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:15:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:15:46,818 INFO L87 Difference]: Start difference. First operand 180 states and 511 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:15:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:49,945 INFO L93 Difference]: Finished difference Result 428 states and 1062 transitions. [2021-11-07 01:15:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:15:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:15:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:49,950 INFO L225 Difference]: With dead ends: 428 [2021-11-07 01:15:49,950 INFO L226 Difference]: Without dead ends: 428 [2021-11-07 01:15:49,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:15:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-07 01:15:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 198. [2021-11-07 01:15:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 3.00507614213198) internal successors, (592), 197 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 01:15:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 592 transitions. [2021-11-07 01:15:49,959 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 592 transitions. Word has length 17 [2021-11-07 01:15:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:49,960 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 592 transitions. [2021-11-07 01:15:49,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:15:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 592 transitions. [2021-11-07 01:15:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:15:49,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:49,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:49,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2021-11-07 01:15:50,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:50,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:50,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:50,570 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:15:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1570989279, now seen corresponding path program 2 times [2021-11-07 01:15:50,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:50,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50186452] [2021-11-07 01:15:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:15:50,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:50,571 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:50,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-07 01:15:52,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:15:52,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:52,817 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:52,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:53,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:53,143 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:53,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:15:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:53,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:53,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50186452] [2021-11-07 01:15:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50186452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:53,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289997890] [2021-11-07 01:15:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:15:53,439 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:53,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:53,440 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:53,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-11-07 01:15:55,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:15:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:56,115 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:56,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:56,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:56,380 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:15:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:56,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289997890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:56,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933660446] [2021-11-07 01:15:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:15:56,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:15:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:15:56,565 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:15:56,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 01:15:58,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:15:58,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:15:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:15:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:58,638 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:15:58,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:15:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:58,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:59,008 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:15:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:15:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:15:59,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933660446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:59,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:15:59,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:15:59,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525906297] [2021-11-07 01:15:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:15:59,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:59,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:15:59,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:15:59,245 INFO L87 Difference]: Start difference. First operand 198 states and 592 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:16:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:01,838 INFO L93 Difference]: Finished difference Result 374 states and 966 transitions. [2021-11-07 01:16:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:16:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:16:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:01,842 INFO L225 Difference]: With dead ends: 374 [2021-11-07 01:16:01,842 INFO L226 Difference]: Without dead ends: 374 [2021-11-07 01:16:01,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:16:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-07 01:16:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 198. [2021-11-07 01:16:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 3.00507614213198) internal successors, (592), 197 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 01:16:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 592 transitions. [2021-11-07 01:16:01,848 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 592 transitions. Word has length 17 [2021-11-07 01:16:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:01,849 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 592 transitions. [2021-11-07 01:16:01,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:16:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 592 transitions. [2021-11-07 01:16:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:16:01,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:01,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:01,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:02,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:02,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2021-11-07 01:16:02,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:02,451 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:16:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1232476673, now seen corresponding path program 3 times [2021-11-07 01:16:02,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:02,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857974792] [2021-11-07 01:16:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:16:02,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:02,453 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:02,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-07 01:16:04,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:16:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:04,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:04,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:04,494 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:04,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:04,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:04,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857974792] [2021-11-07 01:16:04,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857974792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:04,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [528388316] [2021-11-07 01:16:04,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:16:04,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:04,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:04,944 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:04,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2021-11-07 01:16:07,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:16:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:07,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:07,939 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:07,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:08,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [528388316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:08,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220277323] [2021-11-07 01:16:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:16:08,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:16:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:16:08,095 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:16:08,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 01:16:09,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:16:09,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:10,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:10,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:10,326 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:10,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220277323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:10,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:16:10,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:16:10,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078578772] [2021-11-07 01:16:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:16:10,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:16:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:16:10,638 INFO L87 Difference]: Start difference. First operand 198 states and 592 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:16:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:17,695 INFO L93 Difference]: Finished difference Result 390 states and 1044 transitions. [2021-11-07 01:16:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:16:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:16:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:17,702 INFO L225 Difference]: With dead ends: 390 [2021-11-07 01:16:17,702 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 01:16:17,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:16:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 01:16:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 222. [2021-11-07 01:16:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.167420814479638) internal successors, (700), 221 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 01:16:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 700 transitions. [2021-11-07 01:16:17,712 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 700 transitions. Word has length 17 [2021-11-07 01:16:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 700 transitions. [2021-11-07 01:16:17,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:16:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 700 transitions. [2021-11-07 01:16:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:16:17,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:17,713 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:17,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:17,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-07 01:16:18,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:18,316 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:16:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash -203908890, now seen corresponding path program 10 times [2021-11-07 01:16:18,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:18,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114033938] [2021-11-07 01:16:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:16:18,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:18,318 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:18,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-07 01:16:19,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:16:19,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:20,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:20,221 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:20,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:20,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:20,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114033938] [2021-11-07 01:16:20,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114033938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:20,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1807204245] [2021-11-07 01:16:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:16:20,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:20,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:20,597 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:20,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2021-11-07 01:16:22,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:16:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:22,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:22,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:22,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:22,955 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:22,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:23,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1807204245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:23,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036439429] [2021-11-07 01:16:23,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:16:23,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:16:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:16:23,102 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:16:23,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 01:16:25,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:16:25,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:25,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:25,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:25,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:25,264 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:25,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036439429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:25,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:16:25,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:16:25,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826012099] [2021-11-07 01:16:25,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:16:25,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:16:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:16:25,473 INFO L87 Difference]: Start difference. First operand 222 states and 700 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:16:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:28,502 INFO L93 Difference]: Finished difference Result 358 states and 970 transitions. [2021-11-07 01:16:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:16:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 17 [2021-11-07 01:16:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:28,505 INFO L225 Difference]: With dead ends: 358 [2021-11-07 01:16:28,505 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 01:16:28,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:16:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 01:16:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 226. [2021-11-07 01:16:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.1422222222222222) internal successors, (707), 225 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 707 transitions. [2021-11-07 01:16:28,514 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 707 transitions. Word has length 17 [2021-11-07 01:16:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:28,515 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 707 transitions. [2021-11-07 01:16:28,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 01:16:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 707 transitions. [2021-11-07 01:16:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:16:28,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:28,517 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:28,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:28,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:28,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:29,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:16:29,126 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:16:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash -111996744, now seen corresponding path program 11 times [2021-11-07 01:16:29,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:29,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964653277] [2021-11-07 01:16:29,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:16:29,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:29,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:29,128 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:29,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-11-07 01:16:31,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:16:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:31,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:31,570 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:31,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:31,808 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:31,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:16:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:32,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:32,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964653277] [2021-11-07 01:16:32,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964653277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:32,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380056370] [2021-11-07 01:16:32,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:16:32,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:32,275 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:32,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2021-11-07 01:16:34,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:16:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:16:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:35,254 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:35,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:35,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:35,517 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:35,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380056370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:35,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543542277] [2021-11-07 01:16:35,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:16:35,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:16:35,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:16:35,973 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:16:35,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 01:16:37,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:16:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:16:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:38,418 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:38,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:38,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:38,701 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:16:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:38,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543542277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:38,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:16:38,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-11-07 01:16:38,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545420494] [2021-11-07 01:16:38,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:16:38,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:16:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:16:38,923 INFO L87 Difference]: Start difference. First operand 226 states and 707 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:42,355 INFO L93 Difference]: Finished difference Result 408 states and 1084 transitions. [2021-11-07 01:16:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:16:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:16:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:42,361 INFO L225 Difference]: With dead ends: 408 [2021-11-07 01:16:42,362 INFO L226 Difference]: Without dead ends: 408 [2021-11-07 01:16:42,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:16:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-07 01:16:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 232. [2021-11-07 01:16:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.1774891774891776) internal successors, (734), 231 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 01:16:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 734 transitions. [2021-11-07 01:16:42,370 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 734 transitions. Word has length 17 [2021-11-07 01:16:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:42,370 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 734 transitions. [2021-11-07 01:16:42,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 734 transitions. [2021-11-07 01:16:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:16:42,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:42,371 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:42,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:42,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:42,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2021-11-07 01:16:42,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:42,988 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:16:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -973249858, now seen corresponding path program 12 times [2021-11-07 01:16:42,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:42,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552196090] [2021-11-07 01:16:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:16:42,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:42,989 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-11-07 01:16:44,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:16:44,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:45,488 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:45,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:45,827 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:16:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:46,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:46,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552196090] [2021-11-07 01:16:46,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552196090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:46,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921661444] [2021-11-07 01:16:46,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:16:46,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:46,310 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:46,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2021-11-07 01:16:48,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:16:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:48,966 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:48,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:49,211 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:49,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:16:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1921661444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:49,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172859354] [2021-11-07 01:16:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:16:49,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:16:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:16:49,390 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:16:49,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 01:16:51,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:16:51,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:16:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:51,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:52,001 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:52,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:52,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:52,224 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:52,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:16:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:52,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172859354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:52,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:16:52,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:16:52,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384698882] [2021-11-07 01:16:52,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:16:52,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:16:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:16:52,407 INFO L87 Difference]: Start difference. First operand 232 states and 734 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:16:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:54,397 INFO L93 Difference]: Finished difference Result 376 states and 1023 transitions. [2021-11-07 01:16:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:16:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:16:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:54,402 INFO L225 Difference]: With dead ends: 376 [2021-11-07 01:16:54,402 INFO L226 Difference]: Without dead ends: 376 [2021-11-07 01:16:54,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:16:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-07 01:16:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 232. [2021-11-07 01:16:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.1774891774891776) internal successors, (734), 231 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 01:16:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 734 transitions. [2021-11-07 01:16:54,413 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 734 transitions. Word has length 17 [2021-11-07 01:16:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:54,413 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 734 transitions. [2021-11-07 01:16:54,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:16:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 734 transitions. [2021-11-07 01:16:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:16:54,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:54,415 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:54,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:54,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:54,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-07 01:16:55,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:16:55,024 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:16:55,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:55,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1902292616, now seen corresponding path program 13 times [2021-11-07 01:16:55,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:55,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914921851] [2021-11-07 01:16:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:16:55,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:55,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:55,026 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:55,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-07 01:16:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:57,396 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:16:57,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:16:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:57,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:57,744 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:16:57,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:16:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:16:58,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:58,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914921851] [2021-11-07 01:16:58,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914921851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:58,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524049539] [2021-11-07 01:16:58,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:16:58,139 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:58,140 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:58,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2021-11-07 01:17:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:00,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:01,183 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:17:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:17:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:01,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:01,431 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:17:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524049539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:01,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110847107] [2021-11-07 01:17:01,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:17:01,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:17:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:17:01,681 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:17:01,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-07 01:17:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:04,363 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:17:04,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:17:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:04,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:04,642 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:04,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:17:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110847107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:04,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:17:04,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:17:04,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518109766] [2021-11-07 01:17:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:17:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:04,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:17:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:17:04,838 INFO L87 Difference]: Start difference. First operand 232 states and 734 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:17:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:06,274 INFO L93 Difference]: Finished difference Result 352 states and 983 transitions. [2021-11-07 01:17:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:17:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:17:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:06,278 INFO L225 Difference]: With dead ends: 352 [2021-11-07 01:17:06,278 INFO L226 Difference]: Without dead ends: 352 [2021-11-07 01:17:06,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:17:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-07 01:17:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 232. [2021-11-07 01:17:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.1774891774891776) internal successors, (734), 231 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 01:17:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 734 transitions. [2021-11-07 01:17:06,287 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 734 transitions. Word has length 17 [2021-11-07 01:17:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:06,287 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 734 transitions. [2021-11-07 01:17:06,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:17:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 734 transitions. [2021-11-07 01:17:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:17:06,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:06,290 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:06,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:06,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2021-11-07 01:17:06,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:06,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:17:06,900 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:17:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash -238032348, now seen corresponding path program 14 times [2021-11-07 01:17:06,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:06,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053936274] [2021-11-07 01:17:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:17:06,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:06,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:06,902 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:06,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-11-07 01:17:09,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:17:09,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:09,577 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:17:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:17:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:09,992 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:09,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:17:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:10,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:10,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053936274] [2021-11-07 01:17:10,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053936274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:10,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235544288] [2021-11-07 01:17:10,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:17:10,139 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:10,140 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:10,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2021-11-07 01:17:12,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:17:12,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:13,441 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:17:13,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:17:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:13,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:13,733 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:13,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:17:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:13,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1235544288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:13,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62201225] [2021-11-07 01:17:13,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:17:13,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:17:13,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:17:13,860 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:17:13,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-07 01:17:16,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:17:16,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:16,808 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:17:16,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:17:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:17,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:17,247 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:17,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 84 [2021-11-07 01:17:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62201225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:17,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:17:17,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 01:17:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978495203] [2021-11-07 01:17:17,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:17:17,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:17:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:17:17,419 INFO L87 Difference]: Start difference. First operand 232 states and 734 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:19,575 INFO L93 Difference]: Finished difference Result 346 states and 960 transitions. [2021-11-07 01:17:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:17:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:17:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:19,578 INFO L225 Difference]: With dead ends: 346 [2021-11-07 01:17:19,578 INFO L226 Difference]: Without dead ends: 346 [2021-11-07 01:17:19,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:17:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-07 01:17:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 246. [2021-11-07 01:17:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.089795918367347) internal successors, (757), 245 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 757 transitions. [2021-11-07 01:17:19,586 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 757 transitions. Word has length 17 [2021-11-07 01:17:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:19,586 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 757 transitions. [2021-11-07 01:17:19,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 757 transitions. [2021-11-07 01:17:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:17:19,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:19,588 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:19,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:19,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:20,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:20,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:20,198 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:17:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:20,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1248285947, now seen corresponding path program 4 times [2021-11-07 01:17:20,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:20,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153623025] [2021-11-07 01:17:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:17:20,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:20,201 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:20,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-07 01:17:22,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:17:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:22,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:22,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:22,593 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:22,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:17:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:23,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:23,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153623025] [2021-11-07 01:17:23,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153623025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:23,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508090264] [2021-11-07 01:17:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:17:23,217 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:23,218 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2021-11-07 01:17:26,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:17:26,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:26,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:26,272 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:26,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:17:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1508090264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:26,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767108695] [2021-11-07 01:17:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:17:26,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:17:26,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:17:26,449 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:17:26,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-07 01:17:28,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:17:28,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:29,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:29,101 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:29,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:17:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:29,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767108695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:29,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:17:29,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-11-07 01:17:29,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894249857] [2021-11-07 01:17:29,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:17:29,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:17:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:17:29,319 INFO L87 Difference]: Start difference. First operand 246 states and 757 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:46,109 INFO L93 Difference]: Finished difference Result 572 states and 1497 transitions. [2021-11-07 01:17:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 01:17:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:17:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:46,117 INFO L225 Difference]: With dead ends: 572 [2021-11-07 01:17:46,117 INFO L226 Difference]: Without dead ends: 572 [2021-11-07 01:17:46,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=414, Invalid=992, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:17:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-07 01:17:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 256. [2021-11-07 01:17:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.145098039215686) internal successors, (802), 255 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 01:17:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 802 transitions. [2021-11-07 01:17:46,131 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 802 transitions. Word has length 18 [2021-11-07 01:17:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 802 transitions. [2021-11-07 01:17:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 802 transitions. [2021-11-07 01:17:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:17:46,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:46,134 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:46,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2021-11-07 01:17:46,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-11-07 01:17:46,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:46,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:17:46,745 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:17:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash 560489565, now seen corresponding path program 5 times [2021-11-07 01:17:46,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:46,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335516404] [2021-11-07 01:17:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:17:46,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:46,747 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:46,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-11-07 01:17:49,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:17:49,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:49,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:49,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:49,540 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:17:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:50,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:50,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335516404] [2021-11-07 01:17:50,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335516404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:50,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2082192830] [2021-11-07 01:17:50,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:17:50,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:50,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:50,136 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:50,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2021-11-07 01:17:53,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:17:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:53,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:53,392 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:17:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2082192830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:53,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857504357] [2021-11-07 01:17:53,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:17:53,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:17:53,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:17:53,614 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:17:53,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-07 01:17:56,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:17:56,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:17:56,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:56,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:56,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:56,463 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:17:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:17:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:17:56,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857504357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:56,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:17:56,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2021-11-07 01:17:56,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772386374] [2021-11-07 01:17:56,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:17:56,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:17:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:17:56,669 INFO L87 Difference]: Start difference. First operand 256 states and 802 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:05,306 INFO L93 Difference]: Finished difference Result 464 states and 1228 transitions. [2021-11-07 01:18:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 01:18:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:18:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:05,314 INFO L225 Difference]: With dead ends: 464 [2021-11-07 01:18:05,315 INFO L226 Difference]: Without dead ends: 464 [2021-11-07 01:18:05,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:18:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-07 01:18:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 262. [2021-11-07 01:18:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.218390804597701) internal successors, (840), 261 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 01:18:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 840 transitions. [2021-11-07 01:18:05,327 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 840 transitions. Word has length 18 [2021-11-07 01:18:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 840 transitions. [2021-11-07 01:18:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 840 transitions. [2021-11-07 01:18:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:18:05,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:05,329 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:05,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-07 01:18:05,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:05,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:05,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:05,944 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:18:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1060152919, now seen corresponding path program 6 times [2021-11-07 01:18:05,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:05,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372760557] [2021-11-07 01:18:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:18:05,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:05,946 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:05,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-11-07 01:18:08,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:18:08,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:18:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:09,324 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:18:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:18:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:09,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:09,710 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:09,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:18:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:10,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:10,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372760557] [2021-11-07 01:18:10,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372760557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:10,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [656504239] [2021-11-07 01:18:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:18:10,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:10,644 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:10,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2021-11-07 01:18:13,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:18:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:18:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:13,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:14,453 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:18:14,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:18:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:14,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:14,774 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:14,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:18:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:15,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [656504239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:15,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099017370] [2021-11-07 01:18:15,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:18:15,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:18:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:18:15,073 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:18:15,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-07 01:18:17,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:18:17,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:18:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:18,556 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:18:18,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:18:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:18,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:18,896 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:18,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 82 [2021-11-07 01:18:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:19,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099017370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:19,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:18:19,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:18:19,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120372198] [2021-11-07 01:18:19,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:18:19,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:18:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:18:19,240 INFO L87 Difference]: Start difference. First operand 262 states and 840 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:29,009 INFO L93 Difference]: Finished difference Result 508 states and 1370 transitions. [2021-11-07 01:18:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:18:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:18:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:29,017 INFO L225 Difference]: With dead ends: 508 [2021-11-07 01:18:29,017 INFO L226 Difference]: Without dead ends: 508 [2021-11-07 01:18:29,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:18:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-07 01:18:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 280. [2021-11-07 01:18:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.3010752688172045) internal successors, (921), 279 states have internal predecessors, (921), 0 states have call successors, (0), 0 states 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 01:18:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 921 transitions. [2021-11-07 01:18:29,029 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 921 transitions. Word has length 19 [2021-11-07 01:18:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:29,030 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 921 transitions. [2021-11-07 01:18:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 921 transitions. [2021-11-07 01:18:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:18:29,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:29,032 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:29,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (97)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:29,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:29,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:18:29,663 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:18:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1700077162, now seen corresponding path program 11 times [2021-11-07 01:18:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:29,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567194671] [2021-11-07 01:18:29,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:18:29,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:29,665 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:29,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-07 01:18:32,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:18:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:18:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:32,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:32,898 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:18:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:33,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:33,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567194671] [2021-11-07 01:18:33,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567194671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:33,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1085453965] [2021-11-07 01:18:33,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:18:33,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:33,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:33,696 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:33,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2021-11-07 01:18:36,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:18:36,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:18:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:36,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:37,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:37,143 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:18:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1085453965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454772165] [2021-11-07 01:18:37,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:18:37,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:18:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:18:37,436 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:18:37,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-07 01:18:40,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:18:40,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:18:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:40,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:40,433 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:40,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:18:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:40,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454772165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:40,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:18:40,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:18:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641883675] [2021-11-07 01:18:40,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:18:40,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:18:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:18:40,633 INFO L87 Difference]: Start difference. First operand 280 states and 921 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:54,503 INFO L93 Difference]: Finished difference Result 544 states and 1434 transitions. [2021-11-07 01:18:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 01:18:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:18:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:54,510 INFO L225 Difference]: With dead ends: 544 [2021-11-07 01:18:54,510 INFO L226 Difference]: Without dead ends: 544 [2021-11-07 01:18:54,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=619, Invalid=1831, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 01:18:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-07 01:18:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 284. [2021-11-07 01:18:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.2791519434628977) internal successors, (928), 283 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 01:18:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 928 transitions. [2021-11-07 01:18:54,522 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 928 transitions. Word has length 19 [2021-11-07 01:18:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:54,522 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 928 transitions. [2021-11-07 01:18:54,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 928 transitions. [2021-11-07 01:18:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:18:54,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:54,524 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 01:18:54,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-11-07 01:18:54,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (100)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:54,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:55,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:18:55,125 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:18:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1672956810, now seen corresponding path program 7 times [2021-11-07 01:18:55,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:55,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502553567] [2021-11-07 01:18:55,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:18:55,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:55,128 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:55,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-11-07 01:18:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:18:57,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:57,911 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:18:57,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:18:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:18:58,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:58,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502553567] [2021-11-07 01:18:58,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502553567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:58,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417783872] [2021-11-07 01:18:58,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:18:58,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:58,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:58,701 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:58,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2021-11-07 01:19:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:01,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:01,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:02,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:02,251 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:19:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:19:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:02,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417783872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:02,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144065159] [2021-11-07 01:19:02,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:19:02,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:19:02,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:02,567 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:19:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-07 01:19:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:05,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:05,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:05,634 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:19:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 38 [2021-11-07 01:19:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:05,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144065159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:05,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:19:05,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:19:05,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449102357] [2021-11-07 01:19:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:19:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:19:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:19:05,850 INFO L87 Difference]: Start difference. First operand 284 states and 928 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:25,185 INFO L93 Difference]: Finished difference Result 612 states and 1639 transitions. [2021-11-07 01:19:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 01:19:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:19:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:25,193 INFO L225 Difference]: With dead ends: 612 [2021-11-07 01:19:25,193 INFO L226 Difference]: Without dead ends: 612 [2021-11-07 01:19:25,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:19:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-07 01:19:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 300. [2021-11-07 01:19:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.3444816053511706) internal successors, (1000), 299 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 01:19:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 1000 transitions. [2021-11-07 01:19:25,207 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 1000 transitions. Word has length 19 [2021-11-07 01:19:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:25,208 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 1000 transitions. [2021-11-07 01:19:25,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 1000 transitions. [2021-11-07 01:19:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:19:25,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:25,210 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 01:19:25,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:25,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (103)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:25,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:25,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:25,824 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:19:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1608165016, now seen corresponding path program 8 times [2021-11-07 01:19:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:25,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047687794] [2021-11-07 01:19:25,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:19:25,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:25,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:25,826 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-07 01:19:28,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:19:28,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:19:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:29,416 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:19:29,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:19:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:29,762 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:19:29,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:19:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:30,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:30,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047687794] [2021-11-07 01:19:30,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047687794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:30,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269997540] [2021-11-07 01:19:30,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:19:30,759 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:30,760 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:30,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2021-11-07 01:19:34,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:19:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:19:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:35,331 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:19:35,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:19:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:35,607 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:19:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:19:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269997540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:35,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500800752] [2021-11-07 01:19:35,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:19:35,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:19:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:35,931 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:19:35,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-07 01:19:38,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:19:38,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:19:38,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:39,621 INFO L354 Elim1Store]: treesize reduction 306, result has 14.5 percent of original size [2021-11-07 01:19:39,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 486 treesize of output 218 [2021-11-07 01:19:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:39,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:39,956 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:19:39,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 80 [2021-11-07 01:19:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:19:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500800752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:40,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:19:40,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-07 01:19:40,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225890586] [2021-11-07 01:19:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:19:40,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:19:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:19:40,216 INFO L87 Difference]: Start difference. First operand 300 states and 1000 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:54,598 INFO L93 Difference]: Finished difference Result 616 states and 1634 transitions. [2021-11-07 01:19:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:19:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 01:19:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:54,605 INFO L225 Difference]: With dead ends: 616 [2021-11-07 01:19:54,605 INFO L226 Difference]: Without dead ends: 616 [2021-11-07 01:19:54,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:19:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-07 01:19:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 298. [2021-11-07 01:19:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.3367003367003365) internal successors, (991), 297 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 01:19:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 991 transitions. [2021-11-07 01:19:54,616 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 991 transitions. Word has length 19 [2021-11-07 01:19:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:54,616 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 991 transitions. [2021-11-07 01:19:54,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 991 transitions. [2021-11-07 01:19:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:19:54,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:54,618 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 01:19:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (106)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:54,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-07 01:19:55,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:55,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:55,224 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-07 01:19:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash -952797274, now seen corresponding path program 9 times [2021-11-07 01:19:55,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:55,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431356094] [2021-11-07 01:19:55,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:19:55,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:55,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:55,233 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c85a30f-849b-4242-b778-a52a790ddf84/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-07 01:19:58,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:19:58,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:19:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 01:19:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:02,841 INFO L354 Elim1Store]: treesize reduction 13812, result has 0.0 percent of original size [2021-11-07 01:20:02,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 56 select indices, 56 select index equivalence classes, 6 disjoint index pairs (out of 1540 index pairs), introduced 100 new quantified variables, introduced 1540 case distinctions, treesize of input 418907802 treesize of output 1026 [2021-11-07 01:20:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:03,614 INFO L328 TraceCheckSpWp]: Computing backward predicates...