./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/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_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/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_638137b9-a0bc-4730-8a77-01d5a1595084/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:50,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:50,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:50,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:50,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:50,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:50,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:50,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:50,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:50,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:50,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:50,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:50,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:50,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:50,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:50,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:50,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:50,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:50,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:50,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:50,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:50,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:50,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:50,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:50,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:50,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:50,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:50,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:50,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:50,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:50,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:50,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:50,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:50,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:50,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:50,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:50,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:50,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:50,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:50,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:50,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:50,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:55:50,701 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:50,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:50,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:50,704 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:50,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:50,705 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:50,705 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:55:50,705 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:50,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:50,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:55:50,707 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:55:50,707 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:50,708 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:55:50,708 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:55:50,708 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:55:50,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:50,710 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:50,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:55:50,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:50,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:50,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:50,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:50,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:50,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:50,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:50,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:50,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:50,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:50,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:50,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:50,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:50,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:50,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:50,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:50,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:55:50,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:55:50,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:50,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:50,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:50,718 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_638137b9-a0bc-4730-8a77-01d5a1595084/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2021-11-07 01:55:51,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:51,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:51,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:51,052 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:51,053 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:51,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-07 01:55:51,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/8ccf03c52/644e0ef563bb4d4d9c60cdda408aef34/FLAGfe168c1b1 [2021-11-07 01:55:51,654 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:51,655 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-07 01:55:51,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/8ccf03c52/644e0ef563bb4d4d9c60cdda408aef34/FLAGfe168c1b1 [2021-11-07 01:55:52,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/8ccf03c52/644e0ef563bb4d4d9c60cdda408aef34 [2021-11-07 01:55:52,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:52,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:52,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:52,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:52,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:52,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:52" (1/1) ... [2021-11-07 01:55:52,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2644a814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:52, skipping insertion in model container [2021-11-07 01:55:52,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:52" (1/1) ... [2021-11-07 01:55:52,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:52,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:52,293 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_638137b9-a0bc-4730-8a77-01d5a1595084/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-07 01:55:52,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:52,311 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 01:55:52,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61cb497a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:52, skipping insertion in model container [2021-11-07 01:55:52,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:52,312 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:55:52,315 INFO L168 Benchmark]: Toolchain (without parser) took 285.47 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 59.3 MB in the beginning and 119.9 MB in the end (delta: -60.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:55:52,316 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:55:52,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.81 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 59.0 MB in the beginning and 119.9 MB in the end (delta: -60.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:55:52,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 21.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.81 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 59.0 MB in the beginning and 119.9 MB in the end (delta: -60.9 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: 112]: 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_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/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_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/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_638137b9-a0bc-4730-8a77-01d5a1595084/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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:54,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:54,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:54,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:54,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:54,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:54,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:54,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:54,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:54,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:54,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:54,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:54,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:54,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:54,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:54,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:54,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:54,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:54,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:54,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:54,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:54,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:54,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:54,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:54,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:54,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:54,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:54,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:54,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:54,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:54,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:54,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:54,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:54,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:54,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:54,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:54,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:54,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:54,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:54,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:54,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:54,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:55:54,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:54,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:54,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:54,793 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:54,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:54,793 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:54,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:54,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:54,794 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:54,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:54,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:54,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:54,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:54,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:54,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:54,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:54,798 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:54,798 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:55:54,798 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:55:54,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:54,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:54,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:54,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:54,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:54,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:55:54,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:54,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:54,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:54,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:54,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:54,800 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:55:54,801 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:54,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:54,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:54,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:54,802 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_638137b9-a0bc-4730-8a77-01d5a1595084/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2021-11-07 01:55:55,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:55,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:55,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:55,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:55,194 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:55,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-07 01:55:55,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/6e6a54a95/91463ab5e94d4a739c1c0238b11e7685/FLAG70a68398f [2021-11-07 01:55:55,866 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:55,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2021-11-07 01:55:55,878 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/6e6a54a95/91463ab5e94d4a739c1c0238b11e7685/FLAG70a68398f [2021-11-07 01:55:56,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/data/6e6a54a95/91463ab5e94d4a739c1c0238b11e7685 [2021-11-07 01:55:56,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:56,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:56,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:56,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:56,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:56,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e70d2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56, skipping insertion in model container [2021-11-07 01:55:56,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:56,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:56,453 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_638137b9-a0bc-4730-8a77-01d5a1595084/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-07 01:55:56,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:56,474 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:55:56,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:56,496 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_638137b9-a0bc-4730-8a77-01d5a1595084/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-07 01:55:56,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:56,505 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:55:56,551 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_638137b9-a0bc-4730-8a77-01d5a1595084/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2021-11-07 01:55:56,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:56,587 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:55:56,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56 WrapperNode [2021-11-07 01:55:56,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:56,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:56,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:55:56,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:55:56,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:56,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:55:56,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:55:56,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:55:56,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:55:56,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:55:56,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:55:56,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:55:56,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (1/1) ... [2021-11-07 01:55:56,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:56,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:55:56,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:55:56,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:55:56,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:55:56,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:55:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 01:55:56,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 01:55:56,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 01:55:56,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 01:55:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 01:55:56,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 01:55:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 01:55:56,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 01:55:56,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:55:56,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:55:56,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:55:56,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:55:56,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:55:56,804 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 01:55:57,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:55:57,472 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-07 01:55:57,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:57 BoogieIcfgContainer [2021-11-07 01:55:57,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:55:57,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:55:57,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:55:57,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:55:57,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:56" (1/3) ... [2021-11-07 01:55:57,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8ac942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:57, skipping insertion in model container [2021-11-07 01:55:57,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:56" (2/3) ... [2021-11-07 01:55:57,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8ac942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:57, skipping insertion in model container [2021-11-07 01:55:57,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:57" (3/3) ... [2021-11-07 01:55:57,483 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2021-11-07 01:55:57,488 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:55:57,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:55:57,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:55:57,489 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:55:57,526 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,527 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,528 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,528 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,528 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,529 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,531 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,531 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,532 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,532 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,533 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,533 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,533 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,533 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,534 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,535 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,536 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,541 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,541 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,541 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,541 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,542 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,542 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,543 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,543 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,544 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,544 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,545 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,545 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,546 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,546 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,546 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,547 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,547 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,547 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,547 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,547 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,548 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,548 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,548 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,548 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,548 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,549 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,549 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,549 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,549 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,549 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,550 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,550 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,550 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,550 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,550 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,551 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,551 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,551 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,551 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,551 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,552 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,552 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,552 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,552 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,552 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,555 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,556 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,556 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,567 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,568 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,568 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,571 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,572 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,573 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,573 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,573 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,573 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:55:57,591 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-07 01:55:57,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:55:57,663 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 01:55:57,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:55:57,705 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:55:57,715 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 167 transitions, 358 flow [2021-11-07 01:55:57,723 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 167 transitions, 358 flow [2021-11-07 01:55:57,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 167 transitions, 358 flow [2021-11-07 01:55:57,840 INFO L129 PetriNetUnfolder]: 16/164 cut-off events. [2021-11-07 01:55:57,840 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 01:55:57,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 164 events. 16/164 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 116 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2021-11-07 01:55:57,851 INFO L116 LiptonReduction]: Number of co-enabled transitions 1720 [2021-11-07 01:56:16,132 INFO L131 LiptonReduction]: Checked pairs total: 2515 [2021-11-07 01:56:16,133 INFO L133 LiptonReduction]: Total number of compositions: 161 [2021-11-07 01:56:16,141 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 90 flow [2021-11-07 01:56:16,164 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:56:16,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:16,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:16,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1888298596, now seen corresponding path program 1 times [2021-11-07 01:56:16,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:16,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886621778] [2021-11-07 01:56:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:16,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:16,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:16,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:56:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:16,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:56:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:16,981 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 01:56:16,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:17,265 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 01:56:17,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:17,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886621778] [2021-11-07 01:56:17,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886621778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:17,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:17,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 01:56:17,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922540227] [2021-11-07 01:56:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:17,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:17,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:56:17,290 INFO L87 Difference]: Start difference. First operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 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 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:17,750 INFO L93 Difference]: Finished difference Result 416 states and 1428 transitions. [2021-11-07 01:56:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 01:56:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:17,768 INFO L225 Difference]: With dead ends: 416 [2021-11-07 01:56:17,769 INFO L226 Difference]: Without dead ends: 378 [2021-11-07 01:56:17,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-07 01:56:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 268. [2021-11-07 01:56:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.4307116104868913) internal successors, (916), 267 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 916 transitions. [2021-11-07 01:56:17,863 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 916 transitions. Word has length 21 [2021-11-07 01:56:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:17,864 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 916 transitions. [2021-11-07 01:56:17,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 916 transitions. [2021-11-07 01:56:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:56:17,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:17,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:17,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:56:18,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:18,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash 12539017, now seen corresponding path program 1 times [2021-11-07 01:56:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:18,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482465523] [2021-11-07 01:56:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:18,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:18,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:18,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:56:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:56:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:18,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:18,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:18,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482465523] [2021-11-07 01:56:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482465523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:18,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:18,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:56:18,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597220072] [2021-11-07 01:56:18,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:56:18,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:56:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:18,484 INFO L87 Difference]: Start difference. First operand 268 states and 916 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:19,048 INFO L93 Difference]: Finished difference Result 476 states and 1646 transitions. [2021-11-07 01:56:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:56:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 01:56:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:19,056 INFO L225 Difference]: With dead ends: 476 [2021-11-07 01:56:19,056 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 01:56:19,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:56:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 01:56:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 260. [2021-11-07 01:56:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.4285714285714284) internal successors, (888), 259 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 888 transitions. [2021-11-07 01:56:19,077 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 888 transitions. Word has length 22 [2021-11-07 01:56:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:19,077 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 888 transitions. [2021-11-07 01:56:19,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 888 transitions. [2021-11-07 01:56:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:56:19,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:19,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:19,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:19,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:19,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash 488880533, now seen corresponding path program 2 times [2021-11-07 01:56:19,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:19,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410868023] [2021-11-07 01:56:19,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:19,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:19,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:19,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:56:19,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:19,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:56:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:19,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:19,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:19,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410868023] [2021-11-07 01:56:19,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410868023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:19,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:19,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:56:19,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562521812] [2021-11-07 01:56:19,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:56:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:56:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:19,802 INFO L87 Difference]: Start difference. First operand 260 states and 888 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:20,590 INFO L93 Difference]: Finished difference Result 618 states and 2130 transitions. [2021-11-07 01:56:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:56:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 01:56:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:20,599 INFO L225 Difference]: With dead ends: 618 [2021-11-07 01:56:20,599 INFO L226 Difference]: Without dead ends: 576 [2021-11-07 01:56:20,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:56:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-07 01:56:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 300. [2021-11-07 01:56:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.5986622073578594) internal successors, (1076), 299 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 1076 transitions. [2021-11-07 01:56:20,627 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 1076 transitions. Word has length 22 [2021-11-07 01:56:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:20,627 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 1076 transitions. [2021-11-07 01:56:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 1076 transitions. [2021-11-07 01:56:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:56:20,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:20,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:20,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:20,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:20,846 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1119434649, now seen corresponding path program 3 times [2021-11-07 01:56:20,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:20,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769061677] [2021-11-07 01:56:20,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:56:20,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:20,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:20,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:56:21,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:56:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:56:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:21,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:21,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:21,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769061677] [2021-11-07 01:56:21,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769061677] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:56:21,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:56:21,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-07 01:56:21,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888867223] [2021-11-07 01:56:21,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:56:21,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:56:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:21,478 INFO L87 Difference]: Start difference. First operand 300 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:21,682 INFO L93 Difference]: Finished difference Result 538 states and 1866 transitions. [2021-11-07 01:56:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:56:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 01:56:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:21,688 INFO L225 Difference]: With dead ends: 538 [2021-11-07 01:56:21,688 INFO L226 Difference]: Without dead ends: 530 [2021-11-07 01:56:21,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-07 01:56:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 412. [2021-11-07 01:56:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.6350364963503647) internal successors, (1494), 411 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1494 transitions. [2021-11-07 01:56:21,722 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1494 transitions. Word has length 22 [2021-11-07 01:56:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1494 transitions. [2021-11-07 01:56:21,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1494 transitions. [2021-11-07 01:56:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:56:21,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:21,725 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:21,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:21,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:21,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1484814396, now seen corresponding path program 1 times [2021-11-07 01:56:21,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:21,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556429184] [2021-11-07 01:56:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:21,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:21,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:21,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:56:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:22,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:22,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556429184] [2021-11-07 01:56:22,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556429184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:22,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:22,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:56:22,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374437418] [2021-11-07 01:56:22,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:22,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:56:22,297 INFO L87 Difference]: Start difference. First operand 412 states and 1494 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:22,359 INFO L93 Difference]: Finished difference Result 706 states and 2401 transitions. [2021-11-07 01:56:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:56:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 01:56:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:22,367 INFO L225 Difference]: With dead ends: 706 [2021-11-07 01:56:22,367 INFO L226 Difference]: Without dead ends: 664 [2021-11-07 01:56:22,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:56:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-07 01:56:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 546. [2021-11-07 01:56:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.4935779816513763) internal successors, (1904), 545 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1904 transitions. [2021-11-07 01:56:22,401 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1904 transitions. Word has length 23 [2021-11-07 01:56:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:22,401 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1904 transitions. [2021-11-07 01:56:22,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1904 transitions. [2021-11-07 01:56:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:56:22,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:22,411 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:22,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:22,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:22,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2064467594, now seen corresponding path program 1 times [2021-11-07 01:56:22,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:22,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095003372] [2021-11-07 01:56:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:22,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:22,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:22,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:22,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:56:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:56:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:56:23,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:56:23,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:23,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095003372] [2021-11-07 01:56:23,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095003372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:23,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [922355463] [2021-11-07 01:56:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:23,203 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:23,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:23,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:56:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:56:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:56:23,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:56:23,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [922355463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:23,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120819735] [2021-11-07 01:56:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:23,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:23,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:23,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:56:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:24,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:24,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120819735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:24,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:56:24,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 17 [2021-11-07 01:56:24,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613596501] [2021-11-07 01:56:24,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:24,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:56:24,219 INFO L87 Difference]: Start difference. First operand 546 states and 1904 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:24,643 INFO L93 Difference]: Finished difference Result 956 states and 3285 transitions. [2021-11-07 01:56:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:56:24,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:56:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:24,653 INFO L225 Difference]: With dead ends: 956 [2021-11-07 01:56:24,653 INFO L226 Difference]: Without dead ends: 922 [2021-11-07 01:56:24,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:56:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-11-07 01:56:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 550. [2021-11-07 01:56:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.3806921675774135) internal successors, (1856), 549 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1856 transitions. [2021-11-07 01:56:24,685 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1856 transitions. Word has length 24 [2021-11-07 01:56:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:24,686 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1856 transitions. [2021-11-07 01:56:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1856 transitions. [2021-11-07 01:56:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:56:24,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:24,689 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:24,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:24,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:25,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:25,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:25,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash -681677160, now seen corresponding path program 2 times [2021-11-07 01:56:25,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:25,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334568638] [2021-11-07 01:56:25,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:25,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:25,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:25,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:25,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:56:25,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:25,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:56:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:25,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:26,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:26,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334568638] [2021-11-07 01:56:26,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334568638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:26,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1032384671] [2021-11-07 01:56:26,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:26,005 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:26,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:26,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:56:26,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:56:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:26,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:26,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1032384671] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:56:26,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:56:26,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 4] total 12 [2021-11-07 01:56:26,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015312472] [2021-11-07 01:56:26,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:56:26,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:56:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:56:26,713 INFO L87 Difference]: Start difference. First operand 550 states and 1856 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 01:56:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:26,942 INFO L93 Difference]: Finished difference Result 875 states and 2857 transitions. [2021-11-07 01:56:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:56:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 24 [2021-11-07 01:56:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:26,951 INFO L225 Difference]: With dead ends: 875 [2021-11-07 01:56:26,951 INFO L226 Difference]: Without dead ends: 845 [2021-11-07 01:56:26,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:56:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-11-07 01:56:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 410. [2021-11-07 01:56:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.371638141809291) internal successors, (1379), 409 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1379 transitions. [2021-11-07 01:56:26,974 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1379 transitions. Word has length 24 [2021-11-07 01:56:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:26,974 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1379 transitions. [2021-11-07 01:56:26,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 01:56:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1379 transitions. [2021-11-07 01:56:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:56:26,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:26,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:27,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:27,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-07 01:56:27,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:27,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1265088166, now seen corresponding path program 1 times [2021-11-07 01:56:27,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:27,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808760092] [2021-11-07 01:56:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:27,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:27,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:27,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:27,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:56:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:27,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:27,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:27,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:27,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:27,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808760092] [2021-11-07 01:56:27,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808760092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:27,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:27,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:56:27,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305252413] [2021-11-07 01:56:27,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:27,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:56:27,825 INFO L87 Difference]: Start difference. First operand 410 states and 1379 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:28,003 INFO L93 Difference]: Finished difference Result 636 states and 2107 transitions. [2021-11-07 01:56:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:56:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:56:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:28,010 INFO L225 Difference]: With dead ends: 636 [2021-11-07 01:56:28,010 INFO L226 Difference]: Without dead ends: 618 [2021-11-07 01:56:28,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-07 01:56:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 442. [2021-11-07 01:56:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.36734693877551) internal successors, (1485), 441 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1485 transitions. [2021-11-07 01:56:28,036 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1485 transitions. Word has length 25 [2021-11-07 01:56:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:28,037 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1485 transitions. [2021-11-07 01:56:28,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1485 transitions. [2021-11-07 01:56:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:56:28,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:28,039 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:28,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:28,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:28,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1883534090, now seen corresponding path program 2 times [2021-11-07 01:56:28,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:28,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653708336] [2021-11-07 01:56:28,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:28,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:28,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:28,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:56:28,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:28,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:28,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:28,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:28,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653708336] [2021-11-07 01:56:28,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653708336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:28,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:28,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:56:28,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179285023] [2021-11-07 01:56:28,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:28,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:56:28,766 INFO L87 Difference]: Start difference. First operand 442 states and 1485 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:28,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:28,889 INFO L93 Difference]: Finished difference Result 624 states and 2059 transitions. [2021-11-07 01:56:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 01:56:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:28,899 INFO L225 Difference]: With dead ends: 624 [2021-11-07 01:56:28,900 INFO L226 Difference]: Without dead ends: 582 [2021-11-07 01:56:28,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-07 01:56:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 486. [2021-11-07 01:56:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.354639175257732) internal successors, (1627), 485 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1627 transitions. [2021-11-07 01:56:28,931 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1627 transitions. Word has length 25 [2021-11-07 01:56:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:28,931 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1627 transitions. [2021-11-07 01:56:28,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1627 transitions. [2021-11-07 01:56:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:56:28,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:28,934 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:28,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:29,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:29,147 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:29,147 INFO L85 PathProgramCache]: Analyzing trace with hash 741948538, now seen corresponding path program 3 times [2021-11-07 01:56:29,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:29,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023752152] [2021-11-07 01:56:29,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:56:29,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:29,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:29,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:29,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:56:29,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:56:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:29,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:56:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:29,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:29,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:29,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023752152] [2021-11-07 01:56:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023752152] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:56:29,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:56:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-07 01:56:29,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305517182] [2021-11-07 01:56:29,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:56:29,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:56:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:29,825 INFO L87 Difference]: Start difference. First operand 486 states and 1627 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 01:56:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:30,055 INFO L93 Difference]: Finished difference Result 836 states and 2632 transitions. [2021-11-07 01:56:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:56:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 27 [2021-11-07 01:56:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:30,064 INFO L225 Difference]: With dead ends: 836 [2021-11-07 01:56:30,064 INFO L226 Difference]: Without dead ends: 762 [2021-11-07 01:56:30,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-07 01:56:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 554. [2021-11-07 01:56:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.368896925858951) internal successors, (1863), 553 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1863 transitions. [2021-11-07 01:56:30,090 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1863 transitions. Word has length 27 [2021-11-07 01:56:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:30,090 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1863 transitions. [2021-11-07 01:56:30,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 01:56:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1863 transitions. [2021-11-07 01:56:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:56:30,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:30,093 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:30,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:30,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:30,314 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:30,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1368085230, now seen corresponding path program 4 times [2021-11-07 01:56:30,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:30,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032350060] [2021-11-07 01:56:30,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:56:30,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:30,316 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:56:30,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:56:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:56:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:30,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:31,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032350060] [2021-11-07 01:56:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032350060] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:56:31,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:56:31,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-07 01:56:31,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101668891] [2021-11-07 01:56:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:56:31,139 INFO L87 Difference]: Start difference. First operand 554 states and 1863 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 01:56:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:31,330 INFO L93 Difference]: Finished difference Result 442 states and 1407 transitions. [2021-11-07 01:56:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:56:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 27 [2021-11-07 01:56:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:31,334 INFO L225 Difference]: With dead ends: 442 [2021-11-07 01:56:31,334 INFO L226 Difference]: Without dead ends: 372 [2021-11-07 01:56:31,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:56:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-07 01:56:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2021-11-07 01:56:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.3908355795148246) internal successors, (1258), 371 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1258 transitions. [2021-11-07 01:56:31,349 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1258 transitions. Word has length 27 [2021-11-07 01:56:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:31,349 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1258 transitions. [2021-11-07 01:56:31,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 01:56:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1258 transitions. [2021-11-07 01:56:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:56:31,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:31,351 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:31,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:31,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:31,564 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1395658083, now seen corresponding path program 1 times [2021-11-07 01:56:31,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:31,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010937166] [2021-11-07 01:56:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:31,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:31,566 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:31,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:56:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:56:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:32,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:32,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:32,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010937166] [2021-11-07 01:56:32,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010937166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:32,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [228747614] [2021-11-07 01:56:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:32,359 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:32,360 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:32,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:56:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:56:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:33,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:33,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [228747614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:33,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78058716] [2021-11-07 01:56:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:33,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:33,147 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:33,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:56:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:56:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:33,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:33,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78058716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:33,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:56:33,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 24 [2021-11-07 01:56:33,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063716307] [2021-11-07 01:56:33,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 01:56:33,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 01:56:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:56:33,981 INFO L87 Difference]: Start difference. First operand 372 states and 1258 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:37,849 INFO L93 Difference]: Finished difference Result 1447 states and 4873 transitions. [2021-11-07 01:56:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 01:56:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 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 29 [2021-11-07 01:56:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:37,867 INFO L225 Difference]: With dead ends: 1447 [2021-11-07 01:56:37,867 INFO L226 Difference]: Without dead ends: 1256 [2021-11-07 01:56:37,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=817, Invalid=3089, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 01:56:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-11-07 01:56:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 484. [2021-11-07 01:56:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.420289855072464) internal successors, (1652), 483 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1652 transitions. [2021-11-07 01:56:37,903 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1652 transitions. Word has length 29 [2021-11-07 01:56:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1652 transitions. [2021-11-07 01:56:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1652 transitions. [2021-11-07 01:56:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 01:56:37,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:37,910 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:37,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:38,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:38,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:56:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:38,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 599218868, now seen corresponding path program 2 times [2021-11-07 01:56:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:38,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677821852] [2021-11-07 01:56:38,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:38,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:38,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:38,539 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:38,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:56:38,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:38,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:56:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:39,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:56:39,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:39,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677821852] [2021-11-07 01:56:39,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677821852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:39,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1975205786] [2021-11-07 01:56:39,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:39,621 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:39,633 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:39,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:56:40,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:40,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:56:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:56:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:56:40,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1975205786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:40,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138865553] [2021-11-07 01:56:40,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:40,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:40,717 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:40,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 01:56:41,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:56:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:41,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138865553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:41,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:56:41,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 10, 7, 7, 7] total 26 [2021-11-07 01:56:41,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071351793] [2021-11-07 01:56:41,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 01:56:41,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 01:56:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:56:41,587 INFO L87 Difference]: Start difference. First operand 484 states and 1652 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:48,691 INFO L93 Difference]: Finished difference Result 3124 states and 11287 transitions. [2021-11-07 01:56:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 01:56:48,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 01:56:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:48,723 INFO L225 Difference]: With dead ends: 3124 [2021-11-07 01:56:48,723 INFO L226 Difference]: Without dead ends: 3124 [2021-11-07 01:56:48,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4784 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2474, Invalid=11806, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 01:56:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-07 01:56:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 514. [2021-11-07 01:56:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.3723196881091617) internal successors, (1730), 513 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1730 transitions. [2021-11-07 01:56:48,777 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1730 transitions. Word has length 31 [2021-11-07 01:56:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:48,778 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1730 transitions. [2021-11-07 01:56:48,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1730 transitions. [2021-11-07 01:56:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:56:48,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:48,807 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:48,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-07 01:56:49,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:49,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:49,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:49,433 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2120710204, now seen corresponding path program 1 times [2021-11-07 01:56:49,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:49,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42096430] [2021-11-07 01:56:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:49,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:49,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:49,435 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:49,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:56:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:50,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:50,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:50,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42096430] [2021-11-07 01:56:50,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42096430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:50,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1746959455] [2021-11-07 01:56:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:50,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:50,287 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:50,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:56:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:56:50,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:51,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:51,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1746959455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:51,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356059262] [2021-11-07 01:56:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:51,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:51,234 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:51,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:56:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:51,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:52,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356059262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:52,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:56:52,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:56:52,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959118508] [2021-11-07 01:56:52,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:56:52,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:56:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:56:52,024 INFO L87 Difference]: Start difference. First operand 514 states and 1730 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:52,559 INFO L93 Difference]: Finished difference Result 784 states and 2630 transitions. [2021-11-07 01:56:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:56:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:56:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:52,567 INFO L225 Difference]: With dead ends: 784 [2021-11-07 01:56:52,567 INFO L226 Difference]: Without dead ends: 742 [2021-11-07 01:56:52,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:56:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-07 01:56:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 610. [2021-11-07 01:56:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.3793103448275863) internal successors, (2058), 609 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2058 transitions. [2021-11-07 01:56:52,596 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2058 transitions. Word has length 35 [2021-11-07 01:56:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:52,596 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 2058 transitions. [2021-11-07 01:56:52,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2058 transitions. [2021-11-07 01:56:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:56:52,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:52,600 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:52,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:52,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:53,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:53,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:53,204 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1838225952, now seen corresponding path program 2 times [2021-11-07 01:56:53,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:53,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685215210] [2021-11-07 01:56:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:53,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:53,205 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:53,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:56:53,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:53,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:54,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:54,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685215210] [2021-11-07 01:56:54,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685215210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:54,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1266176201] [2021-11-07 01:56:54,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:54,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:54,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:54,059 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:54,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:56:54,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:56:54,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741017548] [2021-11-07 01:56:54,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:56:54,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:54,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:54,883 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:54,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2021-11-07 01:56:54,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:56:55,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:56:55,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:55,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:55,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:55,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741017548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:55,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:56:55,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2021-11-07 01:56:55,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456047133] [2021-11-07 01:56:55,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:56:55,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:55,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:56:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:56:55,972 INFO L87 Difference]: Start difference. First operand 610 states and 2058 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:56,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:56,655 INFO L93 Difference]: Finished difference Result 952 states and 3204 transitions. [2021-11-07 01:56:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:56:56,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:56:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:56,663 INFO L225 Difference]: With dead ends: 952 [2021-11-07 01:56:56,663 INFO L226 Difference]: Without dead ends: 910 [2021-11-07 01:56:56,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:56:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-11-07 01:56:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 610. [2021-11-07 01:56:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.3793103448275863) internal successors, (2058), 609 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2058 transitions. [2021-11-07 01:56:56,688 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2058 transitions. Word has length 35 [2021-11-07 01:56:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:56,688 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 2058 transitions. [2021-11-07 01:56:56,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2058 transitions. [2021-11-07 01:56:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:56:56,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:56,691 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:56,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:56,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:57,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:57,105 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:56:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash 461145272, now seen corresponding path program 3 times [2021-11-07 01:56:57,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:57,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424906144] [2021-11-07 01:56:57,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:56:57,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:57,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:57,107 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:57,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:56:58,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:56:58,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:56:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:58,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:56:58,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:58,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424906144] [2021-11-07 01:56:58,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424906144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:58,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143744664] [2021-11-07 01:56:58,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:56:58,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:58,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:58,318 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:58,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:56:59,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:56:59,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420918088] [2021-11-07 01:56:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:56:59,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:59,403 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:56:59,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 1 [2021-11-07 01:57:01,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 01:57:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:01,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:01,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420918088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:01,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:57:01,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2021-11-07 01:57:01,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619179230] [2021-11-07 01:57:01,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:01,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:01,426 INFO L87 Difference]: Start difference. First operand 610 states and 2058 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:02,061 INFO L93 Difference]: Finished difference Result 1274 states and 4339 transitions. [2021-11-07 01:57:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:57:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:57:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:02,072 INFO L225 Difference]: With dead ends: 1274 [2021-11-07 01:57:02,073 INFO L226 Difference]: Without dead ends: 1208 [2021-11-07 01:57:02,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:57:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-11-07 01:57:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 654. [2021-11-07 01:57:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.3690658499234303) internal successors, (2200), 653 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2200 transitions. [2021-11-07 01:57:02,102 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2200 transitions. Word has length 35 [2021-11-07 01:57:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:02,103 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 2200 transitions. [2021-11-07 01:57:02,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2200 transitions. [2021-11-07 01:57:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:57:02,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:02,106 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:02,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:02,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 01:57:02,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:57:02,521 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:57:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash 343614046, now seen corresponding path program 4 times [2021-11-07 01:57:02,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:02,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402916549] [2021-11-07 01:57:02,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:57:02,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:02,523 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:02,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:57:03,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:57:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:03,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:03,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:03,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:03,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402916549] [2021-11-07 01:57:03,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402916549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:03,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1195691770] [2021-11-07 01:57:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:57:03,538 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:03,541 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:03,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:57:04,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:57:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:57:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:04,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:04,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1195691770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:04,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652531717] [2021-11-07 01:57:04,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:57:04,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:57:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:04,674 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:57:04,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:57:05,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:57:05,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:05,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:57:05,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652531717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:05,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:57:05,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-07 01:57:05,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225575685] [2021-11-07 01:57:05,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:05,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:05,573 INFO L87 Difference]: Start difference. First operand 654 states and 2200 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:06,201 INFO L93 Difference]: Finished difference Result 1024 states and 3460 transitions. [2021-11-07 01:57:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:57:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:57:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:06,208 INFO L225 Difference]: With dead ends: 1024 [2021-11-07 01:57:06,208 INFO L226 Difference]: Without dead ends: 982 [2021-11-07 01:57:06,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:57:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-07 01:57:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 630. [2021-11-07 01:57:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.3672496025437204) internal successors, (2118), 629 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 2118 transitions. [2021-11-07 01:57:06,247 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 2118 transitions. Word has length 35 [2021-11-07 01:57:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:06,249 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 2118 transitions. [2021-11-07 01:57:06,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 2118 transitions. [2021-11-07 01:57:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:57:06,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:06,256 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:06,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:06,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 01:57:06,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-07 01:57:06,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:06,868 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 01:57:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1638993776, now seen corresponding path program 5 times [2021-11-07 01:57:06,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:06,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066684334] [2021-11-07 01:57:06,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:57:06,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:06,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:06,870 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:06,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:57:07,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:57:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:57:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:57:08,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:09,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:09,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066684334] [2021-11-07 01:57:09,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066684334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:09,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [680100770] [2021-11-07 01:57:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:57:09,817 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:09,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:09,824 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:09,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:57:11,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:57:11,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:11,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:57:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:57:12,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:12,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [680100770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:12,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827078996] [2021-11-07 01:57:12,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:57:12,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:57:12,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:12,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:57:12,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 01:57:13,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:57:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:57:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:14,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827078996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:15,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:57:15,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 10, 6, 6, 6] total 19 [2021-11-07 01:57:15,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001072648] [2021-11-07 01:57:15,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:57:15,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:57:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:57:15,042 INFO L87 Difference]: Start difference. First operand 630 states and 2118 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:23,287 INFO L93 Difference]: Finished difference Result 888 states and 3017 transitions. [2021-11-07 01:57:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:57:23,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:57:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:23,289 INFO L225 Difference]: With dead ends: 888 [2021-11-07 01:57:23,289 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:57:23,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:57:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:57:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:57:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:57:23,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-11-07 01:57:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:23,290 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:57:23,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:57:23,291 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:57:23,293 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:57:23,294 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-07 01:57:23,294 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-07 01:57:23,294 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-11-07 01:57:23,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:23,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 01:57:23,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:23,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:23,910 INFO L731 BasicCegarLoop]: Path program histogram: [5, 4, 3, 2, 2, 1, 1] [2021-11-07 01:57:23,911 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-07 01:57:23,911 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:57:23,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:57:23 BasicIcfg [2021-11-07 01:57:23,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:57:23,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:57:23,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:57:23,913 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:57:23,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:57" (3/4) ... [2021-11-07 01:57:23,916 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 01:57:23,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-11-07 01:57:23,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-11-07 01:57:23,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-11-07 01:57:23,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-11-07 01:57:23,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 01:57:23,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:57:23,927 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:57:23,974 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:57:23,974 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:57:23,976 INFO L168 Benchmark]: Toolchain (without parser) took 87766.38 ms. Allocated memory was 52.4 MB in the beginning and 176.2 MB in the end (delta: 123.7 MB). Free memory was 29.5 MB in the beginning and 70.2 MB in the end (delta: -40.7 MB). Peak memory consumption was 83.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:23,976 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 33.3 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:57:23,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.62 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 29.3 MB in the beginning and 51.6 MB in the end (delta: -22.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:23,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.72 ms. Allocated memory is still 69.2 MB. Free memory was 51.6 MB in the beginning and 49.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:57:23,978 INFO L168 Benchmark]: Boogie Preprocessor took 57.89 ms. Allocated memory is still 69.2 MB. Free memory was 49.9 MB in the beginning and 48.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:23,979 INFO L168 Benchmark]: RCFGBuilder took 745.22 ms. Allocated memory is still 69.2 MB. Free memory was 48.1 MB in the beginning and 44.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:23,979 INFO L168 Benchmark]: TraceAbstraction took 86436.13 ms. Allocated memory was 69.2 MB in the beginning and 176.2 MB in the end (delta: 107.0 MB). Free memory was 43.6 MB in the beginning and 73.8 MB in the end (delta: -30.2 MB). Peak memory consumption was 79.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:23,980 INFO L168 Benchmark]: Witness Printer took 61.25 ms. Allocated memory is still 176.2 MB. Free memory was 73.8 MB in the beginning and 70.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:57:23,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 33.3 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.62 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 29.3 MB in the beginning and 51.6 MB in the end (delta: -22.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.72 ms. Allocated memory is still 69.2 MB. Free memory was 51.6 MB in the beginning and 49.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.89 ms. Allocated memory is still 69.2 MB. Free memory was 49.9 MB in the beginning and 48.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 745.22 ms. Allocated memory is still 69.2 MB. Free memory was 48.1 MB in the beginning and 44.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 86436.13 ms. Allocated memory was 69.2 MB in the beginning and 176.2 MB in the end (delta: 107.0 MB). Free memory was 43.6 MB in the beginning and 73.8 MB in the end (delta: -30.2 MB). Peak memory consumption was 79.3 MB. Max. memory is 16.1 GB. * Witness Printer took 61.25 ms. Allocated memory is still 176.2 MB. Free memory was 73.8 MB in the beginning and 70.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18.4s, 161 PlacesBefore, 37 PlacesAfterwards, 167 TransitionsBefore, 33 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 7 FixpointIterations, 94 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 161 TotalNumberOfCompositions, 2515 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2188, positive: 2111, positive conditional: 0, positive unconditional: 2111, negative: 77, negative conditional: 0, negative unconditional: 77, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1200, positive: 1180, positive conditional: 0, positive unconditional: 1180, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1200, positive: 1180, positive conditional: 0, positive unconditional: 1180, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1178, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1178, negative conditional: 0, negative unconditional: 1178, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2188, positive: 931, positive conditional: 0, positive unconditional: 931, negative: 57, negative conditional: 0, negative unconditional: 57, unknown: 1200, unknown conditional: 0, unknown unconditional: 1200] , Statistics on independence cache: Total cache size (in pairs): 106, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 103]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 187 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 86.2s, OverallIterations: 18, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 18.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1160 SDtfs, 2883 SDslu, 4976 SDs, 0 SdLazy, 3973 SolverSat, 489 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2129 GetRequests, 1734 SyntacticMatches, 1 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6402 ImplicationChecksByTransitivity, 16.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=16, InterpolantAutomatonStates: 300, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 6813 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 14.5s InterpolantComputationTime, 975 NumberOfCodeBlocks, 893 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1884 ConstructedInterpolants, 8 QuantifiedInterpolants, 6575 SizeOfPredicates, 142 NumberOfNonLiveVariables, 3817 ConjunctsInSsa, 291 ConjunctsInUnsatCore, 66 InterpolantComputations, 18 PerfectInterpolantSequences, 525/646 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-07 01:57:24,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_638137b9-a0bc-4730-8a77-01d5a1595084/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE