./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-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_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/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_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/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_1b3cc456-8c2d-4fab-b4df-0f0906209015/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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:20,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:20,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:20,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:20,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:20,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:20,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:20,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:20,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:20,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:20,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:20,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:20,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:20,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:20,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:20,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:20,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:20,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:20,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:20,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:20,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:20,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:20,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:20,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:20,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:20,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:20,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:20,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:20,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:20,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:20,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:20,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:20,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:20,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:20,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:20,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:20,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:20,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:20,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:20,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:20,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:20,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:20:20,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:20,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:20,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:20,761 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:20,761 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:20,761 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:20,761 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:20:20,762 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:20,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:20,768 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:20:20,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:20:20,768 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:20,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:20:20,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:20:20,769 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:20:20,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:20,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:20,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:20:20,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:20,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:20,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:20,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:20,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:20,771 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:20,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:20,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:20,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:20,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:20,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:20,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:20,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:20,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:20,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:20,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:20,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:20:20,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:20:20,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:20,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:20,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:20,775 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2021-11-07 01:20:21,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:21,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:21,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:21,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:21,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:21,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2021-11-07 01:20:21,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/25871b726/a9c30e8bd7af4be39ea8ff0589925046/FLAGa80dfc587 [2021-11-07 01:20:21,638 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:21,639 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2021-11-07 01:20:21,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/25871b726/a9c30e8bd7af4be39ea8ff0589925046/FLAGa80dfc587 [2021-11-07 01:20:21,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/25871b726/a9c30e8bd7af4be39ea8ff0589925046 [2021-11-07 01:20:21,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:21,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:21,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:21,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:22,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:22,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:21" (1/1) ... [2021-11-07 01:20:22,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9b0a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:22, skipping insertion in model container [2021-11-07 01:20:22,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:21" (1/1) ... [2021-11-07 01:20:22,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:22,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:22,256 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2021-11-07 01:20:22,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:22,292 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 01:20:22,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b3dd474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:22, skipping insertion in model container [2021-11-07 01:20:22,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:22,294 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:20:22,297 INFO L168 Benchmark]: Toolchain (without parser) took 298.80 ms. Allocated memory is still 92.3 MB. Free memory was 57.4 MB in the beginning and 68.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:22,299 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory was 63.7 MB in the beginning and 63.7 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:22,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.33 ms. Allocated memory is still 92.3 MB. Free memory was 57.0 MB in the beginning and 68.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:22,304 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 92.3 MB. Free memory was 63.7 MB in the beginning and 63.7 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.33 ms. Allocated memory is still 92.3 MB. Free memory was 57.0 MB in the beginning and 68.5 MB in the end (delta: -11.5 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: 111]: 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/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_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/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_1b3cc456-8c2d-4fab-b4df-0f0906209015/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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:24,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:24,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:24,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:24,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:24,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:24,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:24,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:24,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:24,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:24,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:24,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:24,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:24,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:24,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:24,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:24,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:24,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:24,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:24,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:24,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:24,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:24,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:24,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:24,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:24,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:24,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:24,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:24,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:24,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:24,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:24,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:24,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:24,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:24,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:24,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:24,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:24,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:24,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:24,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:24,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:24,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:20:24,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:24,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:24,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:24,658 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:24,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:24,659 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:24,659 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:24,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:24,659 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:24,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:24,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:24,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:24,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:24,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:24,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:24,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:24,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:24,664 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:20:24,664 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:20:24,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:24,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:24,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:24,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:24,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:24,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:20:24,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:24,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:24,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:24,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:24,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:24,667 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:20:24,667 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:24,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:24,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:24,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:24,668 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2021-11-07 01:20:25,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:25,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:25,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:25,118 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:25,119 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:25,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2021-11-07 01:20:25,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/69c87a815/8a74a6be336f436eb6a6805049e8e9df/FLAG287244887 [2021-11-07 01:20:25,676 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:25,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2021-11-07 01:20:25,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/69c87a815/8a74a6be336f436eb6a6805049e8e9df/FLAG287244887 [2021-11-07 01:20:26,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/data/69c87a815/8a74a6be336f436eb6a6805049e8e9df [2021-11-07 01:20:26,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:26,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:26,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:26,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:26,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:26,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409e4755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26, skipping insertion in model container [2021-11-07 01:20:26,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:26,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:26,305 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2021-11-07 01:20:26,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:26,344 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:20:26,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:26,365 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2021-11-07 01:20:26,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:26,374 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:20:26,402 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_1b3cc456-8c2d-4fab-b4df-0f0906209015/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2021-11-07 01:20:26,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:26,429 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:20:26,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26 WrapperNode [2021-11-07 01:20:26,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:26,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:26,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:20:26,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:20:26,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:26,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:20:26,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:20:26,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:20:26,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:20:26,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:20:26,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:20:26,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:20:26,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (1/1) ... [2021-11-07 01:20:26,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:26,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:20:26,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:20:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:20:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:20:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:20:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 01:20:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 01:20:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 01:20:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 01:20:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 01:20:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 01:20:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 01:20:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 01:20:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:20:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:20:26,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:20:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:20:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:20:26,686 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 01:20:27,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:20:27,546 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-11-07 01:20:27,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:27 BoogieIcfgContainer [2021-11-07 01:20:27,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:20:27,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:20:27,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:20:27,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:20:27,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:26" (1/3) ... [2021-11-07 01:20:27,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583a0899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:27, skipping insertion in model container [2021-11-07 01:20:27,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:26" (2/3) ... [2021-11-07 01:20:27,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583a0899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:27, skipping insertion in model container [2021-11-07 01:20:27,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:27" (3/3) ... [2021-11-07 01:20:27,556 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2021-11-07 01:20:27,561 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:20:27,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:20:27,562 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:20:27,562 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:20:27,597 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,597 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,598 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,598 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,598 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,599 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,600 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,601 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,602 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,603 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,604 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,605 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,606 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,608 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,608 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,609 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,609 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,609 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,609 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,609 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,610 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,610 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,610 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,611 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,613 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,613 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,613 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,613 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,615 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,615 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,616 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,616 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,617 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,618 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,618 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,618 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,619 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,619 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,620 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,620 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,621 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,621 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,621 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,621 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,622 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,623 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,625 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,625 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,626 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,626 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,627 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,628 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,628 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,628 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,628 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,632 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,633 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,633 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,633 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,633 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,633 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,634 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,637 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,637 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,638 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,638 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,639 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,639 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,642 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,642 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,642 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,642 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,643 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,643 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,646 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:20:27,655 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-07 01:20:27,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:20:27,704 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 01:20:27,705 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:20:27,731 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:20:27,741 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 203 transitions, 430 flow [2021-11-07 01:20:27,744 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 203 transitions, 430 flow [2021-11-07 01:20:27,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 193 places, 203 transitions, 430 flow [2021-11-07 01:20:27,856 INFO L129 PetriNetUnfolder]: 20/200 cut-off events. [2021-11-07 01:20:27,856 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 01:20:27,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 20/200 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 150 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2021-11-07 01:20:27,868 INFO L116 LiptonReduction]: Number of co-enabled transitions 1874 [2021-11-07 01:20:49,935 INFO L131 LiptonReduction]: Checked pairs total: 2595 [2021-11-07 01:20:49,935 INFO L133 LiptonReduction]: Total number of compositions: 203 [2021-11-07 01:20:49,942 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 35 transitions, 94 flow [2021-11-07 01:20:49,964 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 167 states, 166 states have (on average 3.3373493975903616) internal successors, (554), 166 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 166 states have (on average 3.3373493975903616) internal successors, (554), 166 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:20:49,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:49,978 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 01:20:49,979 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 01:20:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:49,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1633447191, now seen corresponding path program 1 times [2021-11-07 01:20:49,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:49,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013169704] [2021-11-07 01:20:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:49,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:49,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:50,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:50,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:20:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:50,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:20:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:50,647 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 01:20:50,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:50,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:50,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013169704] [2021-11-07 01:20:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013169704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:50,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:50,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-07 01:20:50,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097139900] [2021-11-07 01:20:50,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:50,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:50,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:50,853 INFO L87 Difference]: Start difference. First operand has 167 states, 166 states have (on average 3.3373493975903616) internal successors, (554), 166 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 01:20:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:50,946 INFO L93 Difference]: Finished difference Result 282 states and 944 transitions. [2021-11-07 01:20:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 22 [2021-11-07 01:20:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:50,972 INFO L225 Difference]: With dead ends: 282 [2021-11-07 01:20:50,974 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 01:20:50,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 01:20:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2021-11-07 01:20:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 3.3958333333333335) internal successors, (815), 240 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 815 transitions. [2021-11-07 01:20:51,091 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 815 transitions. Word has length 22 [2021-11-07 01:20:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:51,092 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 815 transitions. [2021-11-07 01:20:51,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 01:20:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 815 transitions. [2021-11-07 01:20:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:51,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:51,106 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 01:20:51,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:51,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:51,317 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 01:20:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:51,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1822811530, now seen corresponding path program 1 times [2021-11-07 01:20:51,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:51,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533065477] [2021-11-07 01:20:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:51,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:51,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:51,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:20:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:20:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:51,648 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 01:20:51,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:51,758 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 01:20:51,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:51,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533065477] [2021-11-07 01:20:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533065477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:51,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:51,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:20:51,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197365394] [2021-11-07 01:20:51,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:20:51,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:20:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:51,762 INFO L87 Difference]: Start difference. First operand 241 states and 815 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:52,836 INFO L93 Difference]: Finished difference Result 421 states and 1414 transitions. [2021-11-07 01:20:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:20:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:20:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:52,844 INFO L225 Difference]: With dead ends: 421 [2021-11-07 01:20:52,845 INFO L226 Difference]: Without dead ends: 409 [2021-11-07 01:20:52,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 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 01:20:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-07 01:20:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 253. [2021-11-07 01:20:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.4007936507936507) internal successors, (857), 252 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 857 transitions. [2021-11-07 01:20:52,881 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 857 transitions. Word has length 24 [2021-11-07 01:20:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:52,882 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 857 transitions. [2021-11-07 01:20:52,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 857 transitions. [2021-11-07 01:20:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:52,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:52,884 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 01:20:52,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:53,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:53,098 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 01:20:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1884773338, now seen corresponding path program 2 times [2021-11-07 01:20:53,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:53,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010437942] [2021-11-07 01:20:53,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:20:53,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:53,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:53,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:53,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:20:53,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:20:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:53,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:20:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:53,501 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 01:20:53,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:53,595 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 01:20:53,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:53,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010437942] [2021-11-07 01:20:53,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010437942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:53,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:53,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:20:53,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041621169] [2021-11-07 01:20:53,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:20:53,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:20:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:53,598 INFO L87 Difference]: Start difference. First operand 253 states and 857 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:54,094 INFO L93 Difference]: Finished difference Result 465 states and 1527 transitions. [2021-11-07 01:20:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:20:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:20:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:54,100 INFO L225 Difference]: With dead ends: 465 [2021-11-07 01:20:54,101 INFO L226 Difference]: Without dead ends: 463 [2021-11-07 01:20:54,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:20:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-07 01:20:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 287. [2021-11-07 01:20:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.4510489510489513) internal successors, (987), 286 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 987 transitions. [2021-11-07 01:20:54,130 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 987 transitions. Word has length 24 [2021-11-07 01:20:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:54,130 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 987 transitions. [2021-11-07 01:20:54,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 987 transitions. [2021-11-07 01:20:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:54,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:54,133 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 01:20:54,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:54,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:54,348 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 01:20:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:54,348 INFO L85 PathProgramCache]: Analyzing trace with hash 380688025, now seen corresponding path program 1 times [2021-11-07 01:20:54,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:54,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653454668] [2021-11-07 01:20:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:54,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:54,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:54,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:54,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:20:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:54,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:54,636 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 01:20:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:54,739 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 01:20:54,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:54,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653454668] [2021-11-07 01:20:54,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653454668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:54,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:54,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:20:54,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576503493] [2021-11-07 01:20:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:54,742 INFO L87 Difference]: Start difference. First operand 287 states and 987 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:55,160 INFO L93 Difference]: Finished difference Result 431 states and 1390 transitions. [2021-11-07 01:20:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:20:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:55,165 INFO L225 Difference]: With dead ends: 431 [2021-11-07 01:20:55,165 INFO L226 Difference]: Without dead ends: 399 [2021-11-07 01:20:55,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 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 01:20:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-07 01:20:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 317. [2021-11-07 01:20:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.3607594936708862) internal successors, (1062), 316 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 1062 transitions. [2021-11-07 01:20:55,183 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 1062 transitions. Word has length 24 [2021-11-07 01:20:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:55,183 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 1062 transitions. [2021-11-07 01:20:55,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 1062 transitions. [2021-11-07 01:20:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:55,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:55,186 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 01:20:55,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:55,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:55,398 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 01:20:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2050754476, now seen corresponding path program 3 times [2021-11-07 01:20:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:55,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883510073] [2021-11-07 01:20:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:20:55,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:55,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:55,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:20:55,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:20:55,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:20:55,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:55,783 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 01:20:55,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:55,889 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 01:20:55,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:55,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883510073] [2021-11-07 01:20:55,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883510073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:55,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:55,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:20:55,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689424692] [2021-11-07 01:20:55,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:20:55,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:20:55,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:55,892 INFO L87 Difference]: Start difference. First operand 317 states and 1062 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:56,330 INFO L93 Difference]: Finished difference Result 441 states and 1459 transitions. [2021-11-07 01:20:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:20:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:20:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:56,336 INFO L225 Difference]: With dead ends: 441 [2021-11-07 01:20:56,336 INFO L226 Difference]: Without dead ends: 423 [2021-11-07 01:20:56,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:20:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-07 01:20:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 355. [2021-11-07 01:20:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.3954802259887007) internal successors, (1202), 354 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1202 transitions. [2021-11-07 01:20:56,355 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1202 transitions. Word has length 24 [2021-11-07 01:20:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:56,355 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1202 transitions. [2021-11-07 01:20:56,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1202 transitions. [2021-11-07 01:20:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:56,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:56,358 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 01:20:56,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:56,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:56,579 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 01:20:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1696703218, now seen corresponding path program 4 times [2021-11-07 01:20:56,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:56,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860677898] [2021-11-07 01:20:56,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:20:56,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:56,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:56,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:20:56,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:20:56,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:20:56,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:56,958 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 01:20:56,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:57,068 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 01:20:57,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:57,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860677898] [2021-11-07 01:20:57,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860677898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:57,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:57,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:20:57,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423041135] [2021-11-07 01:20:57,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:20:57,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:20:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:57,071 INFO L87 Difference]: Start difference. First operand 355 states and 1202 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:57,411 INFO L93 Difference]: Finished difference Result 575 states and 1821 transitions. [2021-11-07 01:20:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:20:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:20:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:57,417 INFO L225 Difference]: With dead ends: 575 [2021-11-07 01:20:57,418 INFO L226 Difference]: Without dead ends: 575 [2021-11-07 01:20:57,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:20:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-07 01:20:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 355. [2021-11-07 01:20:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.3559322033898304) internal successors, (1188), 354 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1188 transitions. [2021-11-07 01:20:57,437 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1188 transitions. Word has length 24 [2021-11-07 01:20:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:57,438 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1188 transitions. [2021-11-07 01:20:57,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1188 transitions. [2021-11-07 01:20:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:57,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:57,440 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 01:20:57,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:57,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:57,659 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 01:20:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2110956710, now seen corresponding path program 5 times [2021-11-07 01:20:57,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:57,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093858943] [2021-11-07 01:20:57,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:20:57,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:57,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:57,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:20:57,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:20:57,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:57,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:20:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:58,008 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 01:20:58,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:58,114 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 01:20:58,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:58,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093858943] [2021-11-07 01:20:58,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093858943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:58,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:58,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:20:58,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919438115] [2021-11-07 01:20:58,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:20:58,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:20:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:58,116 INFO L87 Difference]: Start difference. First operand 355 states and 1188 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:59,210 INFO L93 Difference]: Finished difference Result 809 states and 2646 transitions. [2021-11-07 01:20:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:20:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:20:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:59,218 INFO L225 Difference]: With dead ends: 809 [2021-11-07 01:20:59,219 INFO L226 Difference]: Without dead ends: 779 [2021-11-07 01:20:59,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:20:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-07 01:20:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 395. [2021-11-07 01:20:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.3807106598984773) internal successors, (1332), 394 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1332 transitions. [2021-11-07 01:20:59,243 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1332 transitions. Word has length 24 [2021-11-07 01:20:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:59,244 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1332 transitions. [2021-11-07 01:20:59,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1332 transitions. [2021-11-07 01:20:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:20:59,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:59,251 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 01:20:59,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:20:59,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:59,463 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 01:20:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash -903254432, now seen corresponding path program 6 times [2021-11-07 01:20:59,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:59,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118793035] [2021-11-07 01:20:59,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:20:59,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:59,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:59,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:20:59,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 01:20:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:20:59,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:59,908 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 01:20:59,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:00,015 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 01:21:00,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:00,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118793035] [2021-11-07 01:21:00,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118793035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:00,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:00,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:21:00,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090001886] [2021-11-07 01:21:00,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:21:00,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:21:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:00,019 INFO L87 Difference]: Start difference. First operand 395 states and 1332 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:01,018 INFO L93 Difference]: Finished difference Result 559 states and 1879 transitions. [2021-11-07 01:21:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:21:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:21:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:01,023 INFO L225 Difference]: With dead ends: 559 [2021-11-07 01:21:01,024 INFO L226 Difference]: Without dead ends: 531 [2021-11-07 01:21:01,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:21:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-07 01:21:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 375. [2021-11-07 01:21:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.320855614973262) internal successors, (1242), 374 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1242 transitions. [2021-11-07 01:21:01,048 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1242 transitions. Word has length 24 [2021-11-07 01:21:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:01,048 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1242 transitions. [2021-11-07 01:21:01,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1242 transitions. [2021-11-07 01:21:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:21:01,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:01,050 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 01:21:01,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:01,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:01,263 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 01:21:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1102033556, now seen corresponding path program 7 times [2021-11-07 01:21:01,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:01,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672084371] [2021-11-07 01:21:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:21:01,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:01,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:01,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:21:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:21:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:01,625 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 01:21:01,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:01,738 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 01:21:01,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:01,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672084371] [2021-11-07 01:21:01,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672084371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:01,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:01,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:21:01,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754912603] [2021-11-07 01:21:01,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:21:01,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:21:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:01,741 INFO L87 Difference]: Start difference. First operand 375 states and 1242 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:03,068 INFO L93 Difference]: Finished difference Result 1139 states and 3740 transitions. [2021-11-07 01:21:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:21:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:21:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:03,086 INFO L225 Difference]: With dead ends: 1139 [2021-11-07 01:21:03,086 INFO L226 Difference]: Without dead ends: 1115 [2021-11-07 01:21:03,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:21:03,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-11-07 01:21:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 449. [2021-11-07 01:21:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.439732142857143) internal successors, (1541), 448 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1541 transitions. [2021-11-07 01:21:03,115 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1541 transitions. Word has length 24 [2021-11-07 01:21:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:03,115 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1541 transitions. [2021-11-07 01:21:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1541 transitions. [2021-11-07 01:21:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:21:03,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:03,118 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 01:21:03,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:03,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:03,330 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 01:21:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash 105668722, now seen corresponding path program 8 times [2021-11-07 01:21:03,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:03,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272336205] [2021-11-07 01:21:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:21:03,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:03,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:03,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:21:03,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:21:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:21:03,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:21:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:03,810 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 01:21:03,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:03,925 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 01:21:03,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:03,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272336205] [2021-11-07 01:21:03,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272336205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:03,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:21:03,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743051740] [2021-11-07 01:21:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:21:03,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:21:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:03,927 INFO L87 Difference]: Start difference. First operand 449 states and 1541 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:05,136 INFO L93 Difference]: Finished difference Result 767 states and 2664 transitions. [2021-11-07 01:21:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:21:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:21:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:05,144 INFO L225 Difference]: With dead ends: 767 [2021-11-07 01:21:05,144 INFO L226 Difference]: Without dead ends: 711 [2021-11-07 01:21:05,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:21:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-11-07 01:21:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 417. [2021-11-07 01:21:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.4014423076923075) internal successors, (1415), 416 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1415 transitions. [2021-11-07 01:21:05,166 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1415 transitions. Word has length 24 [2021-11-07 01:21:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:05,166 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1415 transitions. [2021-11-07 01:21:05,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1415 transitions. [2021-11-07 01:21:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:21:05,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:05,169 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 01:21:05,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:05,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:05,381 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 01:21:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1993308366, now seen corresponding path program 9 times [2021-11-07 01:21:05,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:05,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686323385] [2021-11-07 01:21:05,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:21:05,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:05,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:05,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:05,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:21:05,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:21:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:21:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:21:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:05,879 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 01:21:05,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:06,037 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 01:21:06,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:06,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686323385] [2021-11-07 01:21:06,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686323385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:06,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356170919] [2021-11-07 01:21:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:21:06,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:06,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:06,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:21:06,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:21:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:21:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:21:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:06,665 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 01:21:06,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:06,741 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 01:21:06,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1356170919] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:21:06,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:21:06,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 5] total 16 [2021-11-07 01:21:06,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182604354] [2021-11-07 01:21:06,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:06,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:21:06,743 INFO L87 Difference]: Start difference. First operand 417 states and 1415 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 01:21:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:07,232 INFO L93 Difference]: Finished difference Result 535 states and 1811 transitions. [2021-11-07 01:21:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 01:21:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:07,244 INFO L225 Difference]: With dead ends: 535 [2021-11-07 01:21:07,244 INFO L226 Difference]: Without dead ends: 535 [2021-11-07 01:21:07,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:21:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-07 01:21:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 417. [2021-11-07 01:21:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.4014423076923075) internal successors, (1415), 416 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1415 transitions. [2021-11-07 01:21:07,262 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1415 transitions. Word has length 24 [2021-11-07 01:21:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:07,262 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1415 transitions. [2021-11-07 01:21:07,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 01:21:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1415 transitions. [2021-11-07 01:21:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:21:07,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:07,265 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 01:21:07,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:07,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:07,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:07,677 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 01:21:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 991171442, now seen corresponding path program 10 times [2021-11-07 01:21:07,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:07,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312704766] [2021-11-07 01:21:07,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:21:07,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:07,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:07,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:07,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:21:07,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:21:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:21:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:21:07,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:08,066 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 01:21:08,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:08,181 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 01:21:08,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:08,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312704766] [2021-11-07 01:21:08,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312704766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:08,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:08,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:21:08,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306911508] [2021-11-07 01:21:08,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:21:08,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:08,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:21:08,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:08,183 INFO L87 Difference]: Start difference. First operand 417 states and 1415 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:09,104 INFO L93 Difference]: Finished difference Result 623 states and 2132 transitions. [2021-11-07 01:21:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:21:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:21:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:09,111 INFO L225 Difference]: With dead ends: 623 [2021-11-07 01:21:09,112 INFO L226 Difference]: Without dead ends: 619 [2021-11-07 01:21:09,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:21:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-07 01:21:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 413. [2021-11-07 01:21:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.3980582524271843) internal successors, (1400), 412 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1400 transitions. [2021-11-07 01:21:09,131 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1400 transitions. Word has length 24 [2021-11-07 01:21:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:09,132 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1400 transitions. [2021-11-07 01:21:09,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1400 transitions. [2021-11-07 01:21:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:21:09,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:09,134 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 01:21:09,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:21:09,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:09,347 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 01:21:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1394482964, now seen corresponding path program 11 times [2021-11-07 01:21:09,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:09,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621736316] [2021-11-07 01:21:09,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:21:09,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:09,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:09,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:21:09,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:21:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:21:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:21:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:09,848 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 01:21:09,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:09,947 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 01:21:09,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:09,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621736316] [2021-11-07 01:21:09,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621736316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:09,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:09,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:21:09,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351643909] [2021-11-07 01:21:09,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:21:09,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:21:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:09,949 INFO L87 Difference]: Start difference. First operand 413 states and 1400 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:11,215 INFO L93 Difference]: Finished difference Result 605 states and 2046 transitions. [2021-11-07 01:21:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:21:11,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 01:21:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:11,221 INFO L225 Difference]: With dead ends: 605 [2021-11-07 01:21:11,221 INFO L226 Difference]: Without dead ends: 567 [2021-11-07 01:21:11,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:21:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-07 01:21:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 237. [2021-11-07 01:21:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.2838983050847457) internal successors, (775), 236 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 775 transitions. [2021-11-07 01:21:11,238 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 775 transitions. Word has length 24 [2021-11-07 01:21:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:11,238 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 775 transitions. [2021-11-07 01:21:11,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 775 transitions. [2021-11-07 01:21:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 01:21:11,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:11,240 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 01:21:11,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:21:11,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:11,452 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 01:21:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash -131710997, now seen corresponding path program 1 times [2021-11-07 01:21:11,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:11,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013277782] [2021-11-07 01:21:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:11,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:11,454 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:11,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:21:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:21:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:21:11,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:21:12,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:12,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013277782] [2021-11-07 01:21:12,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013277782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:21:12,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:21:12,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-07 01:21:12,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373178086] [2021-11-07 01:21:12,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:12,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:21:12,110 INFO L87 Difference]: Start difference. First operand 237 states and 775 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:12,309 INFO L93 Difference]: Finished difference Result 321 states and 994 transitions. [2021-11-07 01:21:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 01:21:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:12,322 INFO L225 Difference]: With dead ends: 321 [2021-11-07 01:21:12,322 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 01:21:12,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 01:21:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 01:21:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-11-07 01:21:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.2552301255230125) internal successors, (778), 239 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 778 transitions. [2021-11-07 01:21:12,331 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 778 transitions. Word has length 25 [2021-11-07 01:21:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:12,332 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 778 transitions. [2021-11-07 01:21:12,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 778 transitions. [2021-11-07 01:21:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:21:12,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:12,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:12,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:12,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:12,546 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 01:21:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1708531597, now seen corresponding path program 1 times [2021-11-07 01:21:12,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:12,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693576494] [2021-11-07 01:21:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:12,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:12,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:12,549 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:12,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:21:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:21:12,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:21:13,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:21:13,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:13,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693576494] [2021-11-07 01:21:13,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693576494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:13,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1632555545] [2021-11-07 01:21:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:13,233 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:13,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:13,233 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:13,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:21:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:21:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:21:13,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:21:14,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1632555545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:14,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457180613] [2021-11-07 01:21:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:14,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:14,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:21:14,078 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:21:14,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:21:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:14,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:14,675 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 01:21:14,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:21:14,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457180613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:14,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:21:14,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 7, 6] total 25 [2021-11-07 01:21:14,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346290758] [2021-11-07 01:21:14,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 01:21:14,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:14,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 01:21:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:21:14,851 INFO L87 Difference]: Start difference. First operand 240 states and 778 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:21,998 INFO L93 Difference]: Finished difference Result 2786 states and 9182 transitions. [2021-11-07 01:21:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-07 01:21:21,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 01:21:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:22,022 INFO L225 Difference]: With dead ends: 2786 [2021-11-07 01:21:22,023 INFO L226 Difference]: Without dead ends: 2786 [2021-11-07 01:21:22,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2414, Invalid=8716, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 01:21:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-11-07 01:21:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 552. [2021-11-07 01:21:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.722323049001815) internal successors, (2051), 551 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 2051 transitions. [2021-11-07 01:21:22,100 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 2051 transitions. Word has length 28 [2021-11-07 01:21:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:22,100 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 2051 transitions. [2021-11-07 01:21:22,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 2051 transitions. [2021-11-07 01:21:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:21:22,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:22,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:22,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:22,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:22,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:22,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:22,715 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 01:21:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1829204860, now seen corresponding path program 1 times [2021-11-07 01:21:22,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:22,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164248844] [2021-11-07 01:21:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:22,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:22,718 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:22,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b3cc456-8c2d-4fab-b4df-0f0906209015/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:21:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:23,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:21:23,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:21:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:24,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:21:24,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:24,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:21:24,397 INFO L354 Elim1Store]: treesize reduction 216, result has 35.9 percent of original size [2021-11-07 01:21:24,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 265 treesize of output 233 [2021-11-07 01:24:37,213 INFO L354 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2021-11-07 01:24:37,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 252 treesize of output 252 [2021-11-07 01:24:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:24:54,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:20,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:25:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1616 treesize of output 1361 [2021-11-07 01:25:21,295 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-11-07 01:25:21,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1336 treesize of output 926 [2021-11-07 01:25:21,848 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-11-07 01:25:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 926 treesize of output 515 [2021-11-07 01:25:23,827 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-07 01:25:23,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1709768047940 treesize of output 1685524970820