./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:59:15,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:59:15,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:59:15,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:59:15,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:59:15,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:59:15,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:59:15,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:59:15,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:59:15,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:59:15,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:59:15,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:59:15,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:59:15,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:59:15,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:59:15,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:59:15,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:59:15,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:59:15,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:59:15,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:59:15,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:59:15,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:59:15,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:59:15,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:59:15,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:59:15,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:59:15,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:59:15,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:59:15,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:59:15,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:59:15,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:59:15,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:59:15,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:59:15,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:59:15,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:59:15,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:59:15,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:59:15,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:59:15,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:59:15,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:59:15,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:59:15,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:59:15,609 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:59:15,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:59:15,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:59:15,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:59:15,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:59:15,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:59:15,612 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:59:15,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:59:15,612 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:59:15,613 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:59:15,613 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:59:15,613 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:59:15,614 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:59:15,614 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:59:15,614 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:59:15,615 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:59:15,615 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:59:15,615 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:59:15,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:59:15,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:59:15,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:59:15,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:59:15,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:59:15,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:59:15,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:59:15,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:59:15,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:59:15,619 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:59:15,619 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:59:15,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:59:15,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:59:15,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:59:15,620 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:59:15,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:59:15,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:59:15,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:59:15,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:59:15,621 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:59:15,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:59:15,622 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:59:15,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:59:15,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:59:15,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 [2022-11-23 14:59:15,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:59:15,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:59:15,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:59:15,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:59:15,942 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:59:15,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-23 14:59:19,043 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:59:19,273 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:59:19,274 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-23 14:59:19,281 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data/aa7c63609/f87d5be16c234b7e9213fdd27b75b361/FLAGd30cd5230 [2022-11-23 14:59:19,294 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data/aa7c63609/f87d5be16c234b7e9213fdd27b75b361 [2022-11-23 14:59:19,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:59:19,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:59:19,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:59:19,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:59:19,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:59:19,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:59:19" (1/1) ... [2022-11-23 14:59:19,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48919778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:19, skipping insertion in model container [2022-11-23 14:59:19,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:59:19" (1/1) ... [2022-11-23 14:59:19,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:59:19,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:59:19,510 WARN L237 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_f9092b8b-232a-4684-bc82-cc95c3e7805d/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-23 14:59:19,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:59:19,538 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 14:59:19,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ddb7126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:19, skipping insertion in model container [2022-11-23 14:59:19,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:59:19,539 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 14:59:19,541 INFO L158 Benchmark]: Toolchain (without parser) took 242.09ms. Allocated memory is still 190.8MB. Free memory was 153.9MB in the beginning and 144.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:59:19,542 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 136.3MB. Free memory was 82.8MB in the beginning and 82.7MB in the end (delta: 134.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:59:19,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.48ms. Allocated memory is still 190.8MB. Free memory was 153.9MB in the beginning and 144.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:59:19,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 136.3MB. Free memory was 82.8MB in the beginning and 82.7MB in the end (delta: 134.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.48ms. Allocated memory is still 190.8MB. Free memory was 153.9MB in the beginning and 144.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:59:21,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:59:21,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:59:21,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:59:21,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:59:21,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:59:21,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:59:21,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:59:21,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:59:21,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:59:21,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:59:21,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:59:21,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:59:21,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:59:21,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:59:21,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:59:21,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:59:21,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:59:21,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:59:21,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:59:21,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:59:21,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:59:21,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:59:21,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:59:21,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:59:21,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:59:21,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:59:21,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:59:21,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:59:21,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:59:21,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:59:21,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:59:21,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:59:21,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:59:21,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:59:21,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:59:21,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:59:21,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:59:21,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:59:21,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:59:21,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:59:21,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 14:59:22,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:59:22,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:59:22,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:59:22,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:59:22,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:59:22,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:59:22,020 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:59:22,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:59:22,021 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:59:22,021 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:59:22,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:59:22,023 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:59:22,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:59:22,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:59:22,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:59:22,025 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:59:22,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:59:22,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:59:22,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:59:22,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:59:22,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:59:22,026 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:59:22,026 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:59:22,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:59:22,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:59:22,027 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:59:22,028 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:59:22,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:59:22,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:59:22,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:59:22,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:59:22,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:59:22,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:59:22,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:59:22,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:59:22,030 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:59:22,031 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:59:22,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:59:22,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:59:22,031 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_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 [2022-11-23 14:59:22,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:59:22,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:59:22,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:59:22,506 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:59:22,506 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:59:22,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-23 14:59:25,578 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:59:25,848 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:59:25,849 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-23 14:59:25,857 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data/4b78d4e22/298aa00594fe4386bce1053d0c173a78/FLAGf51385fcd [2022-11-23 14:59:25,874 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/data/4b78d4e22/298aa00594fe4386bce1053d0c173a78 [2022-11-23 14:59:25,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:59:25,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:59:25,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:59:25,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:59:25,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:59:25,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:59:25" (1/1) ... [2022-11-23 14:59:25,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccf7b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:25, skipping insertion in model container [2022-11-23 14:59:25,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:59:25" (1/1) ... [2022-11-23 14:59:25,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:59:25,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:59:26,096 WARN L237 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_f9092b8b-232a-4684-bc82-cc95c3e7805d/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-23 14:59:26,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:59:26,123 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 14:59:26,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:59:26,141 WARN L237 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_f9092b8b-232a-4684-bc82-cc95c3e7805d/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-23 14:59:26,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:59:26,152 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:59:26,176 WARN L237 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_f9092b8b-232a-4684-bc82-cc95c3e7805d/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-23 14:59:26,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:59:26,198 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:59:26,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26 WrapperNode [2022-11-23 14:59:26,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:59:26,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:59:26,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:59:26,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:59:26,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,247 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 261 [2022-11-23 14:59:26,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:59:26,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:59:26,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:59:26,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:59:26,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,312 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:59:26,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:59:26,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:59:26,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:59:26,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (1/1) ... [2022-11-23 14:59:26,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:59:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:26,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:59:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:59:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:59:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 14:59:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:59:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 14:59:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 14:59:26,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 14:59:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 14:59:26,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 14:59:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 14:59:26,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 14:59:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 14:59:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 14:59:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:59:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:59:26,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:59:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:59:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 14:59:26,489 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:59:26,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:59:26,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:59:27,493 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:59:27,887 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:59:27,887 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-23 14:59:27,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:59:27 BoogieIcfgContainer [2022-11-23 14:59:27,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:59:27,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:59:27,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:59:27,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:59:27,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:59:25" (1/3) ... [2022-11-23 14:59:27,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c52f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:59:27, skipping insertion in model container [2022-11-23 14:59:27,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:26" (2/3) ... [2022-11-23 14:59:27,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c52f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:59:27, skipping insertion in model container [2022-11-23 14:59:27,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:59:27" (3/3) ... [2022-11-23 14:59:27,904 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2022-11-23 14:59:27,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:59:27,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-23 14:59:27,933 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:59:28,076 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 14:59:28,127 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:59:28,142 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 221 transitions, 466 flow [2022-11-23 14:59:28,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 221 transitions, 466 flow [2022-11-23 14:59:28,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 221 transitions, 466 flow [2022-11-23 14:59:28,228 INFO L130 PetriNetUnfolder]: 16/218 cut-off events. [2022-11-23 14:59:28,228 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 14:59:28,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 218 events. 16/218 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 229 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 167. Up to 2 conditions per place. [2022-11-23 14:59:28,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-23 15:00:13,828 INFO L134 LiptonReduction]: Checked pairs total: 3904 [2022-11-23 15:00:13,829 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-23 15:00:13,837 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 59 transitions, 142 flow [2022-11-23 15:00:13,986 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1833 states, 1331 states have (on average 4.844477836213374) internal successors, (6448), 1832 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:14,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:00:14,008 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@816844f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:00:14,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-11-23 15:00:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 1833 states, 1331 states have (on average 4.844477836213374) internal successors, (6448), 1832 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:00:14,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:14,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:00:14,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:14,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 38768, now seen corresponding path program 1 times [2022-11-23 15:00:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:14,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758762468] [2022-11-23 15:00:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:14,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:14,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 15:00:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:14,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:00:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:14,365 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:00:14,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:00:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:14,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:00:14,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758762468] [2022-11-23 15:00:14,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758762468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:14,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:00:14,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:00:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894350595] [2022-11-23 15:00:14,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:14,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:00:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:00:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:14,455 INFO L87 Difference]: Start difference. First operand has 1833 states, 1331 states have (on average 4.844477836213374) internal successors, (6448), 1832 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:14,858 INFO L93 Difference]: Finished difference Result 1830 states and 6445 transitions. [2022-11-23 15:00:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:00:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-23 15:00:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:14,891 INFO L225 Difference]: With dead ends: 1830 [2022-11-23 15:00:14,891 INFO L226 Difference]: Without dead ends: 1830 [2022-11-23 15:00:14,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:14,896 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:00:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-23 15:00:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1830. [2022-11-23 15:00:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1331 states have (on average 4.842223891810669) internal successors, (6445), 1829 states have internal predecessors, (6445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6445 transitions. [2022-11-23 15:00:15,083 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6445 transitions. Word has length 2 [2022-11-23 15:00:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:15,086 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 6445 transitions. [2022-11-23 15:00:15,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6445 transitions. [2022-11-23 15:00:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:00:15,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:15,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:00:15,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:15,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:15,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 38769, now seen corresponding path program 1 times [2022-11-23 15:00:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:15,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711354759] [2022-11-23 15:00:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:15,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:15,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:15,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 15:00:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:00:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:15,636 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:15,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:15,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:00:15,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711354759] [2022-11-23 15:00:15,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711354759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:15,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:00:15,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:00:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38148422] [2022-11-23 15:00:15,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:15,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:00:15,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:00:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:15,693 INFO L87 Difference]: Start difference. First operand 1830 states and 6445 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:16,439 INFO L93 Difference]: Finished difference Result 3657 states and 12887 transitions. [2022-11-23 15:00:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:00:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-23 15:00:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:16,474 INFO L225 Difference]: With dead ends: 3657 [2022-11-23 15:00:16,474 INFO L226 Difference]: Without dead ends: 3657 [2022-11-23 15:00:16,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:16,481 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:16,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:00:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2022-11-23 15:00:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 1832. [2022-11-23 15:00:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1333 states have (on average 4.8394598649662415) internal successors, (6451), 1831 states have internal predecessors, (6451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6451 transitions. [2022-11-23 15:00:16,617 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6451 transitions. Word has length 2 [2022-11-23 15:00:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 6451 transitions. [2022-11-23 15:00:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6451 transitions. [2022-11-23 15:00:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 15:00:16,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:16,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 15:00:16,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:16,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:16,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1208445, now seen corresponding path program 1 times [2022-11-23 15:00:16,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:16,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446673728] [2022-11-23 15:00:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:16,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:16,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 15:00:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:00:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:16,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:00:16,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446673728] [2022-11-23 15:00:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446673728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:17,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:00:17,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:00:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256260387] [2022-11-23 15:00:17,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:17,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:00:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:00:17,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:00:17,002 INFO L87 Difference]: Start difference. First operand 1832 states and 6451 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:17,640 INFO L93 Difference]: Finished difference Result 1833 states and 6448 transitions. [2022-11-23 15:00:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:00:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-23 15:00:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:17,654 INFO L225 Difference]: With dead ends: 1833 [2022-11-23 15:00:17,654 INFO L226 Difference]: Without dead ends: 1832 [2022-11-23 15:00:17,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:00:17,660 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:17,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:00:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-11-23 15:00:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1832. [2022-11-23 15:00:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1333 states have (on average 4.836459114778695) internal successors, (6447), 1831 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6447 transitions. [2022-11-23 15:00:17,738 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6447 transitions. Word has length 3 [2022-11-23 15:00:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:17,739 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 6447 transitions. [2022-11-23 15:00:17,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6447 transitions. [2022-11-23 15:00:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 15:00:17,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:17,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 15:00:17,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:17,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1206818, now seen corresponding path program 1 times [2022-11-23 15:00:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:17,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261928371] [2022-11-23 15:00:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:17,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:17,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:17,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 15:00:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:00:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:18,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:18,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:18,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261928371] [2022-11-23 15:00:18,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261928371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770785999] [2022-11-23 15:00:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:18,592 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:00:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:00:18,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:00:18,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-23 15:00:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:00:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:19,009 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:19,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:19,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770785999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:19,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848451315] [2022-11-23 15:00:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:19,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:19,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:19,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:19,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:00:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:00:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:19,399 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:19,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:19,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:19,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848451315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:19,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:00:19,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-23 15:00:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877435823] [2022-11-23 15:00:19,681 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:00:19,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:00:19,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:00:19,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:00:19,682 INFO L87 Difference]: Start difference. First operand 1832 states and 6447 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:21,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:23,416 INFO L93 Difference]: Finished difference Result 5488 states and 19337 transitions. [2022-11-23 15:00:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:00:23,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 15:00:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:23,459 INFO L225 Difference]: With dead ends: 5488 [2022-11-23 15:00:23,460 INFO L226 Difference]: Without dead ends: 5488 [2022-11-23 15:00:23,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:00:23,461 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 365 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:23,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 12 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 15:00:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5488 states. [2022-11-23 15:00:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5488 to 1838. [2022-11-23 15:00:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1339 states have (on average 4.82823002240478) internal successors, (6465), 1837 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 6465 transitions. [2022-11-23 15:00:23,606 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 6465 transitions. Word has length 3 [2022-11-23 15:00:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:23,606 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 6465 transitions. [2022-11-23 15:00:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 6465 transitions. [2022-11-23 15:00:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:00:23,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:23,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:00:23,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:23,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:24,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:24,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:00:24,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:24,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1159956856, now seen corresponding path program 1 times [2022-11-23 15:00:24,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:24,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110617178] [2022-11-23 15:00:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:24,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:24,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:24,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 15:00:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 15:00:24,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:24,513 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-23 15:00:24,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-23 15:00:24,556 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 15:00:24,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-23 15:00:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:24,875 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-23 15:00:24,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 15:00:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:00:25,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:00:25,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110617178] [2022-11-23 15:00:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110617178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [220730326] [2022-11-23 15:00:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:00:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:00:25,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:00:25,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 15:00:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:00:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:25,813 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-23 15:00:25,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-23 15:00:25,844 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 15:00:25,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-23 15:00:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:26,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:00:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:00:26,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:00:26,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [220730326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:26,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:00:26,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2022-11-23 15:00:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426399684] [2022-11-23 15:00:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:00:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:00:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:00:26,106 INFO L87 Difference]: Start difference. First operand 1838 states and 6465 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:26,496 INFO L93 Difference]: Finished difference Result 1494 states and 5089 transitions. [2022-11-23 15:00:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:00:26,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-23 15:00:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:26,506 INFO L225 Difference]: With dead ends: 1494 [2022-11-23 15:00:26,507 INFO L226 Difference]: Without dead ends: 1494 [2022-11-23 15:00:26,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:00:26,508 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:26,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:00:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-23 15:00:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2022-11-23 15:00:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1121 states have (on average 4.539696699375558) internal successors, (5089), 1493 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5089 transitions. [2022-11-23 15:00:26,583 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5089 transitions. Word has length 5 [2022-11-23 15:00:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:26,583 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 5089 transitions. [2022-11-23 15:00:26,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5089 transitions. [2022-11-23 15:00:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:00:26,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:26,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:00:26,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:26,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-23 15:00:26,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:00:26,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1159956858, now seen corresponding path program 1 times [2022-11-23 15:00:26,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:26,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487062476] [2022-11-23 15:00:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:27,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:27,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 15:00:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:00:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:27,242 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-23 15:00:27,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 15:00:27,351 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:00:27,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 15:00:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:00:27,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:00:27,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:27,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487062476] [2022-11-23 15:00:27,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487062476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:27,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:00:27,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:00:27,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162863570] [2022-11-23 15:00:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:27,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:00:27,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:00:27,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:27,377 INFO L87 Difference]: Start difference. First operand 1494 states and 5089 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:27,708 INFO L93 Difference]: Finished difference Result 1150 states and 3713 transitions. [2022-11-23 15:00:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:00:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-23 15:00:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:27,716 INFO L225 Difference]: With dead ends: 1150 [2022-11-23 15:00:27,716 INFO L226 Difference]: Without dead ends: 1150 [2022-11-23 15:00:27,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:27,717 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:27,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:00:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-23 15:00:27,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2022-11-23 15:00:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 903 states have (on average 4.111849390919159) internal successors, (3713), 1149 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3713 transitions. [2022-11-23 15:00:27,773 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3713 transitions. Word has length 5 [2022-11-23 15:00:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:27,774 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 3713 transitions. [2022-11-23 15:00:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3713 transitions. [2022-11-23 15:00:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:00:27,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:27,775 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-23 15:00:27,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:27,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:27,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:00:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1597520817, now seen corresponding path program 2 times [2022-11-23 15:00:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:00:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297401242] [2022-11-23 15:00:27,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:00:27,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:00:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:00:27,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:00:27,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 15:00:28,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:00:28,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:00:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:00:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:28,283 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:28,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:28,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:29,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:00:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297401242] [2022-11-23 15:00:29,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297401242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751908182] [2022-11-23 15:00:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:00:29,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:00:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:00:29,178 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:00:29,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-23 15:00:29,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:00:29,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:00:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:00:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:29,543 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:29,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:29,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:30,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751908182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680572424] [2022-11-23 15:00:30,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:00:30,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:30,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:30,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:00:30,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:00:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:00:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:00:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:30,940 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:00:30,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:00:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:31,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:00:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680572424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:00:31,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:00:31,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-23 15:00:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083116733] [2022-11-23 15:00:31,253 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:00:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:00:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:00:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:00:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:00:31,255 INFO L87 Difference]: Start difference. First operand 1150 states and 3713 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:00:34,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:36,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:38,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:40,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:42,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:44,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:46,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:48,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:50,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:52,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:55,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:01:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:02,359 INFO L93 Difference]: Finished difference Result 10261 states and 33276 transitions. [2022-11-23 15:01:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:01:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:01:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:02,417 INFO L225 Difference]: With dead ends: 10261 [2022-11-23 15:01:02,417 INFO L226 Difference]: Without dead ends: 10261 [2022-11-23 15:01:02,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:01:02,418 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1177 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 97 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:02,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 102 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1474 Invalid, 6 Unknown, 0 Unchecked, 28.8s Time] [2022-11-23 15:01:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-11-23 15:01:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 1162. [2022-11-23 15:01:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 915 states have (on average 4.087431693989071) internal successors, (3740), 1161 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3740 transitions. [2022-11-23 15:01:02,568 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3740 transitions. Word has length 6 [2022-11-23 15:01:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:02,568 INFO L495 AbstractCegarLoop]: Abstraction has 1162 states and 3740 transitions. [2022-11-23 15:01:02,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3740 transitions. [2022-11-23 15:01:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:01:02,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:02,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:02,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:01:02,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:01:02,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:01:03,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:03,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:01:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1972926851, now seen corresponding path program 1 times [2022-11-23 15:01:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:01:03,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530156477] [2022-11-23 15:01:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:03,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:03,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:01:03,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:01:03,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 15:01:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:01:03,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:03,442 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-23 15:01:03,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-23 15:01:03,821 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-23 15:01:03,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-23 15:01:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:01:03,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:01:03,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:01:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530156477] [2022-11-23 15:01:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530156477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:03,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:03,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:01:03,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000300065] [2022-11-23 15:01:03,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:03,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:01:03,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:01:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:01:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:01:03,966 INFO L87 Difference]: Start difference. First operand 1162 states and 3740 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:04,314 INFO L93 Difference]: Finished difference Result 1106 states and 3579 transitions. [2022-11-23 15:01:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:01:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:01:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:04,320 INFO L225 Difference]: With dead ends: 1106 [2022-11-23 15:01:04,320 INFO L226 Difference]: Without dead ends: 1106 [2022-11-23 15:01:04,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:01:04,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:04,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:01:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-23 15:01:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2022-11-23 15:01:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 889 states have (on average 4.025871766029247) internal successors, (3579), 1105 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 3579 transitions. [2022-11-23 15:01:04,352 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 3579 transitions. Word has length 7 [2022-11-23 15:01:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:04,352 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 3579 transitions. [2022-11-23 15:01:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 3579 transitions. [2022-11-23 15:01:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:01:04,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:04,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:04,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-23 15:01:04,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:04,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:01:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1972926850, now seen corresponding path program 1 times [2022-11-23 15:01:04,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:01:04,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810688488] [2022-11-23 15:01:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:04,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:01:04,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:01:04,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 15:01:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:04,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:01:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:04,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:04,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:04,893 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:01:04,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-23 15:01:04,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 15:01:05,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:05,117 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-23 15:01:05,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 15:01:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:01:05,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:01:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:01:05,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:01:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810688488] [2022-11-23 15:01:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810688488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:01:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [357185457] [2022-11-23 15:01:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:05,662 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:01:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:01:05,663 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:01:05,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-23 15:01:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:01:05,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:05,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:05,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:06,051 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-23 15:01:06,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-23 15:01:06,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-23 15:01:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:06,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:01:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:01:06,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:01:06,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [357185457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:06,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:01:06,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2022-11-23 15:01:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219502394] [2022-11-23 15:01:06,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:01:06,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:01:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:01:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:01:06,302 INFO L87 Difference]: Start difference. First operand 1106 states and 3579 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:06,651 INFO L93 Difference]: Finished difference Result 1050 states and 3418 transitions. [2022-11-23 15:01:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:01:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:01:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:06,659 INFO L225 Difference]: With dead ends: 1050 [2022-11-23 15:01:06,660 INFO L226 Difference]: Without dead ends: 1050 [2022-11-23 15:01:06,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:01:06,662 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:06,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:01:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-11-23 15:01:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1050. [2022-11-23 15:01:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 863 states have (on average 3.9606025492468135) internal successors, (3418), 1049 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3418 transitions. [2022-11-23 15:01:06,712 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3418 transitions. Word has length 7 [2022-11-23 15:01:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:06,712 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 3418 transitions. [2022-11-23 15:01:06,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3418 transitions. [2022-11-23 15:01:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:01:06,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:06,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:06,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:01:06,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:01:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:07,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:01:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196618, now seen corresponding path program 1 times [2022-11-23 15:01:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:01:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785711645] [2022-11-23 15:01:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:07,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:07,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:01:07,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:01:07,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 15:01:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:07,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:01:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:07,378 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:01:07,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:01:07,416 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:01:07,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 15:01:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:01:07,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:01:07,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:01:07,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785711645] [2022-11-23 15:01:07,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785711645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:07,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:07,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:01:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543189685] [2022-11-23 15:01:07,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:07,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:01:07,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:01:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:01:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:01:07,438 INFO L87 Difference]: Start difference. First operand 1050 states and 3418 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:07,757 INFO L93 Difference]: Finished difference Result 712 states and 2283 transitions. [2022-11-23 15:01:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:01:07,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-23 15:01:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:07,760 INFO L225 Difference]: With dead ends: 712 [2022-11-23 15:01:07,760 INFO L226 Difference]: Without dead ends: 712 [2022-11-23 15:01:07,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:07,761 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:07,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:01:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-11-23 15:01:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2022-11-23 15:01:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 606 states have (on average 3.767326732673267) internal successors, (2283), 711 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2283 transitions. [2022-11-23 15:01:07,780 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2283 transitions. Word has length 8 [2022-11-23 15:01:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:07,781 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 2283 transitions. [2022-11-23 15:01:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2283 transitions. [2022-11-23 15:01:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:01:07,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:07,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:07,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:01:07,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:07,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:01:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196617, now seen corresponding path program 1 times [2022-11-23 15:01:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:01:07,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903246029] [2022-11-23 15:01:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:07,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:01:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:01:07,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:01:07,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 15:01:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 15:01:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:08,325 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:01:08,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:01:08,473 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:01:08,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:01:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:08,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:01:08,626 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:01:08,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:01:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:01:08,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:01:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:01:11,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:01:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903246029] [2022-11-23 15:01:11,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903246029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:01:11,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [596214756] [2022-11-23 15:01:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:11,318 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:01:11,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:01:11,319 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:01:11,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 15:01:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:11,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:01:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:11,748 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:01:11,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:01:11,903 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:01:11,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:01:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:12,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:01:12,125 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:01:12,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:01:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:01:12,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:01:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:01:12,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [596214756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:01:12,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612760478] [2022-11-23 15:01:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:12,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:01:12,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:01:12,417 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:01:12,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 15:01:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 15:01:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:01:12,665 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:01:12,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:01:12,807 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 15:01:12,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 15:01:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:01:13,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:01:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:01:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612760478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:01:16,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:01:16,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 6, 6] total 18 [2022-11-23 15:01:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335241399] [2022-11-23 15:01:16,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:01:16,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:01:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:01:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:01:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=308, Unknown=1, NotChecked=0, Total=380 [2022-11-23 15:01:16,183 INFO L87 Difference]: Start difference. First operand 712 states and 2283 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:43,958 WARN L233 SmtUtils]: Spent 27.12s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:01:50,779 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:02:14,462 WARN L233 SmtUtils]: Spent 23.45s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:02:32,212 WARN L233 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:02:59,404 WARN L233 SmtUtils]: Spent 24.83s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:03:13,289 WARN L233 SmtUtils]: Spent 11.68s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:03:47,989 WARN L233 SmtUtils]: Spent 34.25s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:04:02,935 WARN L233 SmtUtils]: Spent 12.57s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:04:22,048 WARN L233 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:04:31,131 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:04:38,002 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:04:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:39,539 INFO L93 Difference]: Finished difference Result 8584 states and 28301 transitions. [2022-11-23 15:04:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 15:04:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:04:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:39,583 INFO L225 Difference]: With dead ends: 8584 [2022-11-23 15:04:39,583 INFO L226 Difference]: Without dead ends: 8584 [2022-11-23 15:04:39,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 202.4s TimeCoverageRelationStatistics Valid=534, Invalid=1721, Unknown=1, NotChecked=0, Total=2256 [2022-11-23 15:04:39,585 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1723 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:39,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 66 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 15:04:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8584 states. [2022-11-23 15:04:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8584 to 920. [2022-11-23 15:04:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 814 states have (on average 4.003685503685504) internal successors, (3259), 919 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3259 transitions. [2022-11-23 15:04:39,697 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3259 transitions. Word has length 8 [2022-11-23 15:04:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:39,698 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 3259 transitions. [2022-11-23 15:04:39,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3259 transitions. [2022-11-23 15:04:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:04:39,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:39,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:39,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:39,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:40,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:40,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:40,318 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:04:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196616, now seen corresponding path program 1 times [2022-11-23 15:04:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:04:40,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249703048] [2022-11-23 15:04:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:04:40,320 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:04:40,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 15:04:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:04:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:40,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 15:04:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:04:40,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:04:40,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:04:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249703048] [2022-11-23 15:04:40,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249703048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:40,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:40,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:04:40,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076737686] [2022-11-23 15:04:40,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:40,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:04:40,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:04:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:04:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:04:40,501 INFO L87 Difference]: Start difference. First operand 920 states and 3259 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:40,844 INFO L93 Difference]: Finished difference Result 614 states and 2084 transitions. [2022-11-23 15:04:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:04:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-23 15:04:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:40,848 INFO L225 Difference]: With dead ends: 614 [2022-11-23 15:04:40,848 INFO L226 Difference]: Without dead ends: 614 [2022-11-23 15:04:40,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:04:40,849 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:04:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-23 15:04:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-11-23 15:04:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 561 states have (on average 3.714795008912656) internal successors, (2084), 613 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2084 transitions. [2022-11-23 15:04:40,868 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2084 transitions. Word has length 8 [2022-11-23 15:04:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:40,868 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 2084 transitions. [2022-11-23 15:04:40,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2084 transitions. [2022-11-23 15:04:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:04:40,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:40,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:40,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:41,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:04:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196615, now seen corresponding path program 1 times [2022-11-23 15:04:41,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:04:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853672455] [2022-11-23 15:04:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:41,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:41,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:04:41,085 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:04:41,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 15:04:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:41,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:04:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:41,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:41,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-23 15:04:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:41,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:04:41,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853672455] [2022-11-23 15:04:41,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853672455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:41,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1153216565] [2022-11-23 15:04:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:41,670 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:41,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:04:41,672 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:04:41,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-23 15:04:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:41,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:04:41,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:42,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:04:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:42,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1153216565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928116548] [2022-11-23 15:04:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:42,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:42,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:42,583 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:42,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 15:04:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:04:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:42,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:04:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:43,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928116548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:43,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:04:43,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 20 [2022-11-23 15:04:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466476298] [2022-11-23 15:04:43,535 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:04:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:04:43,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:04:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:04:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:04:43,537 INFO L87 Difference]: Start difference. First operand 614 states and 2084 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:49,708 INFO L93 Difference]: Finished difference Result 3358 states and 10964 transitions. [2022-11-23 15:04:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:04:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:04:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:49,723 INFO L225 Difference]: With dead ends: 3358 [2022-11-23 15:04:49,724 INFO L226 Difference]: Without dead ends: 3358 [2022-11-23 15:04:49,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=289, Invalid=971, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 15:04:49,725 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1144 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:49,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 54 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 15:04:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2022-11-23 15:04:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 978. [2022-11-23 15:04:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 925 states have (on average 3.7048648648648648) internal successors, (3427), 977 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3427 transitions. [2022-11-23 15:04:49,790 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3427 transitions. Word has length 8 [2022-11-23 15:04:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:49,790 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 3427 transitions. [2022-11-23 15:04:49,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3427 transitions. [2022-11-23 15:04:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:04:49,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:49,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:49,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:50,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:50,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:50,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:50,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:04:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:50,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1902096588, now seen corresponding path program 1 times [2022-11-23 15:04:50,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:04:50,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261768188] [2022-11-23 15:04:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:50,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:50,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:04:50,402 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:04:50,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 15:04:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 15:04:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:50,766 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 15:04:50,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-23 15:04:50,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:04:51,009 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-23 15:04:51,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 15:04:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:51,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:51,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:04:51,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261768188] [2022-11-23 15:04:51,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261768188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:51,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443844240] [2022-11-23 15:04:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:51,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:51,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:04:51,798 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:04:51,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-23 15:04:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:52,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:04:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:52,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,286 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-23 15:04:52,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-23 15:04:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:52,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:04:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:04:52,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:04:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1443844240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:52,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:04:52,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2022-11-23 15:04:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340859713] [2022-11-23 15:04:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:04:52,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:04:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:04:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:04:52,567 INFO L87 Difference]: Start difference. First operand 978 states and 3427 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:53,022 INFO L93 Difference]: Finished difference Result 913 states and 3217 transitions. [2022-11-23 15:04:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:04:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:04:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:53,027 INFO L225 Difference]: With dead ends: 913 [2022-11-23 15:04:53,027 INFO L226 Difference]: Without dead ends: 913 [2022-11-23 15:04:53,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:04:53,028 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:53,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:04:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-23 15:04:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-11-23 15:04:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 872 states have (on average 3.6892201834862384) internal successors, (3217), 912 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 3217 transitions. [2022-11-23 15:04:53,057 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 3217 transitions. Word has length 9 [2022-11-23 15:04:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:53,058 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 3217 transitions. [2022-11-23 15:04:53,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 3217 transitions. [2022-11-23 15:04:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:04:53,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:53,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:53,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:53,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:53,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:53,474 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:04:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1902096590, now seen corresponding path program 1 times [2022-11-23 15:04:53,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:04:53,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317439035] [2022-11-23 15:04:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:04:53,476 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:04:53,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-23 15:04:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:53,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:04:53,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:53,753 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-23 15:04:53,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-23 15:04:53,794 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:04:53,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 15:04:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:04:53,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:04:53,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:04:53,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317439035] [2022-11-23 15:04:53,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317439035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:53,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:53,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:04:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365747725] [2022-11-23 15:04:53,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:04:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:04:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:04:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:04:53,817 INFO L87 Difference]: Start difference. First operand 913 states and 3217 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:54,096 INFO L93 Difference]: Finished difference Result 848 states and 3007 transitions. [2022-11-23 15:04:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:04:54,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:04:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:54,099 INFO L225 Difference]: With dead ends: 848 [2022-11-23 15:04:54,099 INFO L226 Difference]: Without dead ends: 848 [2022-11-23 15:04:54,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:04:54,100 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:54,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:04:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-23 15:04:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2022-11-23 15:04:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 819 states have (on average 3.6715506715506714) internal successors, (3007), 847 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3007 transitions. [2022-11-23 15:04:54,125 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3007 transitions. Word has length 9 [2022-11-23 15:04:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:54,126 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 3007 transitions. [2022-11-23 15:04:54,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3007 transitions. [2022-11-23 15:04:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:04:54,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:54,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:54,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:54,340 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:04:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1902320391, now seen corresponding path program 1 times [2022-11-23 15:04:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:04:54,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632619375] [2022-11-23 15:04:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:54,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:04:54,342 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:04:54,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-23 15:04:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:04:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:54,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:54,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:04:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632619375] [2022-11-23 15:04:54,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632619375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1136247312] [2022-11-23 15:04:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:54,925 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:04:54,926 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:04:54,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-23 15:04:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:04:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:55,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:55,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1136247312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989501910] [2022-11-23 15:04:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:55,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:55,359 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:55,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 15:04:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:55,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:04:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:55,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:55,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989501910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:55,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:04:55,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-23 15:04:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386443616] [2022-11-23 15:04:55,664 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:04:55,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:04:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:04:55,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:04:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:04:55,666 INFO L87 Difference]: Start difference. First operand 848 states and 3007 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:58,071 INFO L93 Difference]: Finished difference Result 1096 states and 3682 transitions. [2022-11-23 15:04:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:04:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:04:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:58,075 INFO L225 Difference]: With dead ends: 1096 [2022-11-23 15:04:58,075 INFO L226 Difference]: Without dead ends: 1096 [2022-11-23 15:04:58,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:04:58,076 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 237 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:58,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 38 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:04:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-11-23 15:04:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 910. [2022-11-23 15:04:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 881 states have (on average 3.6503972758229284) internal successors, (3216), 909 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3216 transitions. [2022-11-23 15:04:58,109 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3216 transitions. Word has length 9 [2022-11-23 15:04:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:58,109 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 3216 transitions. [2022-11-23 15:04:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3216 transitions. [2022-11-23 15:04:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:04:58,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:58,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:58,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-23 15:04:58,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:58,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:58,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:58,712 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:04:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1164542233, now seen corresponding path program 1 times [2022-11-23 15:04:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:04:58,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614180606] [2022-11-23 15:04:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:58,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:04:58,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:04:58,714 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:04:58,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-23 15:04:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:04:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:59,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:59,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:04:59,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614180606] [2022-11-23 15:04:59,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614180606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:59,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495491240] [2022-11-23 15:04:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:59,332 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:04:59,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:04:59,333 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:04:59,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-23 15:04:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:59,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:04:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:59,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:04:59,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495491240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106404457] [2022-11-23 15:04:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:59,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:59,845 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 15:05:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:00,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:05:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:05:00,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:05:00,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106404457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:00,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:05:00,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-23 15:05:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491555887] [2022-11-23 15:05:00,141 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:05:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:05:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:05:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:05:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:05:00,143 INFO L87 Difference]: Start difference. First operand 910 states and 3216 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:02,374 INFO L93 Difference]: Finished difference Result 908 states and 2978 transitions. [2022-11-23 15:05:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:05:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 15:05:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:02,377 INFO L225 Difference]: With dead ends: 908 [2022-11-23 15:05:02,377 INFO L226 Difference]: Without dead ends: 908 [2022-11-23 15:05:02,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:05:02,378 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 198 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:02,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 26 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 15:05:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-23 15:05:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 862. [2022-11-23 15:05:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 833 states have (on average 3.483793517406963) internal successors, (2902), 861 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2902 transitions. [2022-11-23 15:05:02,406 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2902 transitions. Word has length 10 [2022-11-23 15:05:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:02,407 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 2902 transitions. [2022-11-23 15:05:02,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2902 transitions. [2022-11-23 15:05:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:05:02,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:02,408 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1] [2022-11-23 15:05:02,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:02,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:02,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:03,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:05:03,012 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:05:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:03,013 INFO L85 PathProgramCache]: Analyzing trace with hash 289962406, now seen corresponding path program 1 times [2022-11-23 15:05:03,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:05:03,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218278304] [2022-11-23 15:05:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:05:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:05:03,014 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:05:03,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-23 15:05:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:05:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:03,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:05:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:03,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:05,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:05:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218278304] [2022-11-23 15:05:05,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218278304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1432798295] [2022-11-23 15:05:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:05,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:05:05,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:05:05,027 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:05:05,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-23 15:05:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:05:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:05:05,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:05:06,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1432798295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:06,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287209890] [2022-11-23 15:05:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:06,727 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:06,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 15:05:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:05:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:05:07,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:05:07,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287209890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:07,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:05:07,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7, 7, 7, 7] total 32 [2022-11-23 15:05:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812659117] [2022-11-23 15:05:07,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:05:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 15:05:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:05:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 15:05:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 15:05:07,258 INFO L87 Difference]: Start difference. First operand 862 states and 2902 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 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) [2022-11-23 15:05:13,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:05:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:26,305 INFO L93 Difference]: Finished difference Result 4704 states and 15835 transitions. [2022-11-23 15:05:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 15:05:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 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 11 [2022-11-23 15:05:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:26,338 INFO L225 Difference]: With dead ends: 4704 [2022-11-23 15:05:26,338 INFO L226 Difference]: Without dead ends: 4704 [2022-11-23 15:05:26,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 15:05:26,339 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1653 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:26,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 270 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-11-23 15:05:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2022-11-23 15:05:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 865. [2022-11-23 15:05:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 836 states have (on average 3.473684210526316) internal successors, (2904), 864 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2904 transitions. [2022-11-23 15:05:26,396 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2904 transitions. Word has length 11 [2022-11-23 15:05:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:26,396 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 2904 transitions. [2022-11-23 15:05:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 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) [2022-11-23 15:05:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2904 transitions. [2022-11-23 15:05:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:05:26,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:26,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:26,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:26,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:26,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:27,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:05:27,008 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:05:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash 320895134, now seen corresponding path program 2 times [2022-11-23 15:05:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:05:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856118581] [2022-11-23 15:05:27,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:05:27,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:05:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:05:27,009 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:05:27,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-23 15:05:27,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:05:27,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:05:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:05:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:27,394 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-23 15:05:27,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-23 15:05:27,563 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:05:27,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:05:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:27,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:05:27,690 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:05:27,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:05:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:27,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:33,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:05:33,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856118581] [2022-11-23 15:05:33,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856118581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:33,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [144489290] [2022-11-23 15:05:33,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:05:33,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:05:33,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:05:33,323 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:05:33,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-23 15:05:33,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:05:33,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:05:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:05:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:33,918 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:05:33,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:05:34,094 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:05:34,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:05:34,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:34,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 15:05:34,425 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:05:34,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:05:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:34,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [144489290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618032496] [2022-11-23 15:05:38,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:05:38,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:38,247 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:38,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 15:05:38,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:05:38,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:05:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:05:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:38,681 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:05:38,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:05:38,849 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:05:38,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:05:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:39,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:05:39,250 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:05:39,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:05:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:39,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:41,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618032496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:41,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:05:41,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 32 [2022-11-23 15:05:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132387834] [2022-11-23 15:05:41,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:05:41,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 15:05:41,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:05:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 15:05:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:05:41,938 INFO L87 Difference]: Start difference. First operand 865 states and 2904 transitions. Second operand has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:51,332 INFO L93 Difference]: Finished difference Result 3117 states and 10068 transitions. [2022-11-23 15:05:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 15:05:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:05:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:51,340 INFO L225 Difference]: With dead ends: 3117 [2022-11-23 15:05:51,340 INFO L226 Difference]: Without dead ends: 3117 [2022-11-23 15:05:51,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=688, Invalid=2618, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 15:05:51,341 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1399 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:51,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 151 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 15:05:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2022-11-23 15:05:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 1131. [2022-11-23 15:05:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1102 states have (on average 3.746823956442831) internal successors, (4129), 1130 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4129 transitions. [2022-11-23 15:05:51,384 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4129 transitions. Word has length 11 [2022-11-23 15:05:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:51,385 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 4129 transitions. [2022-11-23 15:05:51,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:05:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4129 transitions. [2022-11-23 15:05:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:05:51,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:51,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:51,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:51,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-23 15:05:51,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:51,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:51,993 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:05:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash 320895136, now seen corresponding path program 1 times [2022-11-23 15:05:51,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:05:51,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628022901] [2022-11-23 15:05:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:51,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:05:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:05:51,995 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:05:52,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-23 15:05:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:52,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:05:52,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:52,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:52,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-23 15:05:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:52,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:05:52,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628022901] [2022-11-23 15:05:52,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628022901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:52,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [131985313] [2022-11-23 15:05:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:52,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:05:52,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:05:52,916 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:05:52,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-23 15:05:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:05:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:53,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:05:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:53,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:54,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [131985313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710764466] [2022-11-23 15:05:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:54,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:54,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:54,305 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:54,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 15:05:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:54,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:05:54,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:54,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:05:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:55,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:05:55,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710764466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:55,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:05:55,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 30 [2022-11-23 15:05:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072978487] [2022-11-23 15:05:55,870 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:05:55,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 15:05:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:05:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 15:05:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-11-23 15:05:55,871 INFO L87 Difference]: Start difference. First operand 1131 states and 4129 transitions. Second operand has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:06:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:08,889 INFO L93 Difference]: Finished difference Result 3712 states and 12168 transitions. [2022-11-23 15:06:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 15:06:08,890 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:06:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:08,899 INFO L225 Difference]: With dead ends: 3712 [2022-11-23 15:06:08,899 INFO L226 Difference]: Without dead ends: 3712 [2022-11-23 15:06:08,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=674, Invalid=2748, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 15:06:08,900 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1918 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:08,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1918 Valid, 143 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 15:06:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2022-11-23 15:06:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 1195. [2022-11-23 15:06:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1166 states have (on average 3.6680960548885078) internal successors, (4277), 1194 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:06:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 4277 transitions. [2022-11-23 15:06:08,950 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 4277 transitions. Word has length 11 [2022-11-23 15:06:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:08,950 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 4277 transitions. [2022-11-23 15:06:08,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:06:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 4277 transitions. [2022-11-23 15:06:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:06:08,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:08,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:08,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:09,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:09,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:09,565 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:06:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1855003912, now seen corresponding path program 1 times [2022-11-23 15:06:09,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:06:09,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574259861] [2022-11-23 15:06:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:09,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:06:09,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:06:09,567 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:06:09,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-23 15:06:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:06:09,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:10,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:06:10,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:06:10,173 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:06:10,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:06:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:10,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:06:10,336 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:06:10,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:06:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:06:10,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:06:18,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:06:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574259861] [2022-11-23 15:06:18,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574259861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:06:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907341417] [2022-11-23 15:06:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:18,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:06:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:06:18,297 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:06:18,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-23 15:06:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:06:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:18,895 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:06:18,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:06:19,097 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:06:19,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-23 15:06:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:19,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:06:19,423 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 15:06:19,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 15:06:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:06:19,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:06:21,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907341417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:06:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124307800] [2022-11-23 15:06:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:21,779 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:21,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 15:06:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:06:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:22,129 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 15:06:22,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-23 15:06:22,397 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 15:06:22,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 15:06:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:06:23,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:06:31,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124307800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:06:31,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:06:31,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 24 [2022-11-23 15:06:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236940783] [2022-11-23 15:06:31,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:06:31,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:06:31,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:06:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:06:31,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=545, Unknown=1, NotChecked=0, Total=650 [2022-11-23 15:06:31,445 INFO L87 Difference]: Start difference. First operand 1195 states and 4277 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:06:41,436 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:55,405 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:57,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:07:12,679 WARN L233 SmtUtils]: Spent 11.68s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:07:14,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:07:16,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:07:18,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:07:26,682 WARN L233 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:07:28,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:03,218 WARN L233 SmtUtils]: Spent 30.13s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:08:05,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:17,160 WARN L233 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:08:21,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:24,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:28,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:30,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:33,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:35,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:37,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:45,759 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 68 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:08:49,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:52,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:08:53,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:08,591 WARN L233 SmtUtils]: Spent 12.97s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:09:10,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:12,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:18,692 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:09:22,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:24,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:27,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:29,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:31,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:34,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:42,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:09:44,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:06,585 WARN L233 SmtUtils]: Spent 14.73s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:08,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:10,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:20,431 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification. DAG size of input: 75 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:22,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:25,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:28,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:30,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:33,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:36,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:38,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:10:56,228 WARN L233 SmtUtils]: Spent 13.66s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:16,214 WARN L233 SmtUtils]: Spent 15.77s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:18,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:11:23,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:11:42,621 WARN L233 SmtUtils]: Spent 13.11s on a formula simplification. DAG size of input: 79 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:56,277 WARN L233 SmtUtils]: Spent 11.64s on a formula simplification. DAG size of input: 81 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:09,855 WARN L233 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 77 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:11,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:13,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:20,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:23,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:24,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:26,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:31,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:34,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:36,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:38,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:40,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:43,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:45,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:47,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:50,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:51,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:53,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:56,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:12:59,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:13:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:13:01,953 INFO L93 Difference]: Finished difference Result 4001 states and 14439 transitions. [2022-11-23 15:13:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 15:13:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:13:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:13:01,964 INFO L225 Difference]: With dead ends: 4001 [2022-11-23 15:13:01,964 INFO L226 Difference]: Without dead ends: 4001 [2022-11-23 15:13:01,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 255.1s TimeCoverageRelationStatistics Valid=620, Invalid=2455, Unknown=5, NotChecked=0, Total=3080 [2022-11-23 15:13:01,965 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1151 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 63 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:13:01,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 93 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 982 Invalid, 38 Unknown, 0 Unchecked, 152.9s Time] [2022-11-23 15:13:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-11-23 15:13:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 1718. [2022-11-23 15:13:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1689 states have (on average 3.8052101835405567) internal successors, (6427), 1717 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 6427 transitions. [2022-11-23 15:13:02,031 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 6427 transitions. Word has length 12 [2022-11-23 15:13:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:13:02,031 INFO L495 AbstractCegarLoop]: Abstraction has 1718 states and 6427 transitions. [2022-11-23 15:13:02,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 6427 transitions. [2022-11-23 15:13:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:13:02,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:13:02,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:13:02,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:02,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:02,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-23 15:13:02,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:02,646 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-23 15:13:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:13:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1855003910, now seen corresponding path program 1 times [2022-11-23 15:13:02,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:13:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259176678] [2022-11-23 15:13:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:13:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:13:02,648 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:13:02,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-23 15:13:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:13:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:02,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:13:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:03,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:08,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:13:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259176678] [2022-11-23 15:13:08,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259176678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117525579] [2022-11-23 15:13:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:08,446 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:13:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:13:08,447 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:13:08,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-23 15:13:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:08,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:13:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:08,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:13:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:09,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:13:10,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117525579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:10,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479158571] [2022-11-23 15:13:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:13:10,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:13:10,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:13:10,064 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:13:10,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9092b8b-232a-4684-bc82-cc95c3e7805d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-23 15:13:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:13:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:13:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:13:10,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:13:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:13:10,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:13:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:13:17,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479158571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:13:17,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:13:17,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 22 [2022-11-23 15:13:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728710345] [2022-11-23 15:13:17,457 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:17,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:13:17,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:13:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:13:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=443, Unknown=4, NotChecked=0, Total=552 [2022-11-23 15:13:17,459 INFO L87 Difference]: Start difference. First operand 1718 states and 6427 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:13:54,534 WARN L233 SmtUtils]: Spent 32.97s on a formula simplification. DAG size of input: 35 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:56,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:14:09,408 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:11,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:14:13,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:14:16,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:14:18,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]