./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur --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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --- 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-38b53e6 [2022-11-25 23:43:38,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:43:38,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:43:38,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:43:38,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:43:38,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:43:38,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:43:38,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:43:38,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:43:38,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:43:38,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:43:38,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:43:38,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:43:38,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:43:38,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:43:38,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:43:38,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:43:38,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:43:38,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:43:38,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:43:38,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:43:38,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:43:38,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:43:38,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:43:38,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:43:38,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:43:38,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:43:38,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:43:38,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:43:38,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:43:38,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:43:38,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:43:38,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:43:38,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:43:38,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:43:38,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:43:38,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:43:38,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:43:38,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:43:38,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:43:38,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:43:38,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:43:38,707 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:43:38,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:43:38,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:43:38,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:43:38,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:43:38,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:43:38,709 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:43:38,710 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:43:38,710 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:43:38,710 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:43:38,710 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:43:38,711 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:43:38,711 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:43:38,711 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:43:38,711 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:43:38,712 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:43:38,712 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:43:38,712 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:43:38,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:43:38,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:43:38,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:43:38,714 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:43:38,714 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:43:38,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:43:38,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:43:38,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:43:38,715 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:43:38,715 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:43:38,715 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:43:38,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:43:38,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:43:38,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:43:38,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:43:38,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:43:38,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:43:38,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:43:38,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:43:38,717 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:43:38,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:43:38,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:43:38,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:43:38,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:43:38,719 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 [2022-11-25 23:43:39,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:43:39,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:43:39,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:43:39,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:43:39,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:43:39,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2022-11-25 23:43:42,038 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:43:42,240 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:43:42,240 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2022-11-25 23:43:42,248 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data/e49985e28/4281760748034225be6769cdfbb897de/FLAGb46507c19 [2022-11-25 23:43:42,263 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data/e49985e28/4281760748034225be6769cdfbb897de [2022-11-25 23:43:42,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:43:42,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:43:42,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:43:42,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:43:42,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:43:42,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:43:42" (1/1) ... [2022-11-25 23:43:42,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89763dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:42, skipping insertion in model container [2022-11-25 23:43:42,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:43:42" (1/1) ... [2022-11-25 23:43:42,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:43:42,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:43:42,497 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[3996,4009] [2022-11-25 23:43:42,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:43:42,528 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) [2022-11-25 23:43:42,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d39037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:42, skipping insertion in model container [2022-11-25 23:43:42,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:43:42,529 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 23:43:42,531 INFO L158 Benchmark]: Toolchain (without parser) took 262.96ms. Allocated memory is still 186.6MB. Free memory was 142.7MB in the beginning and 131.5MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 23:43:42,531 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 127.9MB. Free memory was 71.4MB in the beginning and 71.3MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:43:42,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.48ms. Allocated memory is still 186.6MB. Free memory was 142.0MB in the beginning and 131.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:43:42,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 127.9MB. Free memory was 71.4MB in the beginning and 71.3MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.48ms. Allocated memory is still 186.6MB. Free memory was 142.0MB in the beginning and 131.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur --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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --- 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-38b53e6 [2022-11-25 23:43:44,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:43:44,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:43:44,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:43:44,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:43:44,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:43:44,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:43:44,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:43:44,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:43:44,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:43:44,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:43:44,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:43:44,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:43:44,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:43:44,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:43:44,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:43:44,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:43:44,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:43:44,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:43:44,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:43:44,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:43:44,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:43:44,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:43:44,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:43:44,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:43:44,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:43:44,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:43:44,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:43:44,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:43:44,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:43:44,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:43:44,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:43:44,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:43:44,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:43:44,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:43:44,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:43:44,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:43:44,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:43:44,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:43:44,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:43:45,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:43:45,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:43:45,049 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:43:45,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:43:45,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:43:45,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:43:45,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:43:45,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:43:45,052 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:43:45,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:43:45,052 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:43:45,053 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:43:45,054 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:43:45,054 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:43:45,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:43:45,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:43:45,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:43:45,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:43:45,056 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:43:45,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:43:45,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:43:45,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:43:45,056 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:43:45,057 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:43:45,057 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:43:45,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:43:45,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:43:45,057 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:43:45,058 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:43:45,058 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:43:45,058 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:43:45,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:43:45,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:43:45,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:43:45,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:43:45,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:43:45,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:43:45,060 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:43:45,060 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:45,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:43:45,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:43:45,061 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 [2022-11-25 23:43:45,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:43:45,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:43:45,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:43:45,500 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:43:45,500 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:43:45,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2022-11-25 23:43:48,450 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:43:48,706 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:43:48,706 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2022-11-25 23:43:48,714 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data/e1f30fb25/e720a1f301274dfe9976bb39097fb4af/FLAG7842322b8 [2022-11-25 23:43:48,739 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/data/e1f30fb25/e720a1f301274dfe9976bb39097fb4af [2022-11-25 23:43:48,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:43:48,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:43:48,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:43:48,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:43:48,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:43:48,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:43:48" (1/1) ... [2022-11-25 23:43:48,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef28a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:48, skipping insertion in model container [2022-11-25 23:43:48,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:43:48" (1/1) ... [2022-11-25 23:43:48,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:43:48,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:43:49,061 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[3996,4009] [2022-11-25 23:43:49,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:43:49,113 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 23:43:49,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:43:49,153 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[3996,4009] [2022-11-25 23:43:49,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:43:49,165 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:43:49,191 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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[3996,4009] [2022-11-25 23:43:49,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:43:49,213 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:43:49,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49 WrapperNode [2022-11-25 23:43:49,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:43:49,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:43:49,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:43:49,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:43:49,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,299 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 395 [2022-11-25 23:43:49,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:43:49,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:43:49,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:43:49,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:43:49,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:43:49,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:43:49,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:43:49,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:43:49,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (1/1) ... [2022-11-25 23:43:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:43:49,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:49,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:43:49,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:43:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:43:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-25 23:43:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:43:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:43:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 23:43:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:43:49,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:43:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:43:49,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:43:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:43:49,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:43:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:43:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:43:49,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:43:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-25 23:43:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:43:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 23:43:49,522 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:43:49,716 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:43:49,718 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:43:50,898 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:43:50,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:43:50,909 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 23:43:50,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:43:50 BoogieIcfgContainer [2022-11-25 23:43:50,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:43:50,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:43:50,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:43:50,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:43:50,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:43:48" (1/3) ... [2022-11-25 23:43:50,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da27272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:43:50, skipping insertion in model container [2022-11-25 23:43:50,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:49" (2/3) ... [2022-11-25 23:43:50,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da27272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:43:50, skipping insertion in model container [2022-11-25 23:43:50,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:43:50" (3/3) ... [2022-11-25 23:43:50,920 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2022-11-25 23:43:50,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:43:50,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2022-11-25 23:43:50,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:43:51,140 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 23:43:51,199 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:43:51,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-25 23:43:51,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-25 23:43:51,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 559 places, 590 transitions, 1204 flow [2022-11-25 23:43:51,553 INFO L130 PetriNetUnfolder]: 41/587 cut-off events. [2022-11-25 23:43:51,553 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 23:43:51,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 587 events. 41/587 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1032 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 485. Up to 2 conditions per place. [2022-11-25 23:43:51,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 32370 [2022-11-25 23:45:29,824 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 23:45:38,322 INFO L134 LiptonReduction]: Checked pairs total: 53242 [2022-11-25 23:45:38,322 INFO L136 LiptonReduction]: Total number of compositions: 719 [2022-11-25 23:45:38,329 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 107 transitions, 238 flow [2022-11-25 23:45:39,596 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:39,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:45:39,628 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;@ed0fa3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:45:39,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2022-11-25 23:45:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:45:39,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:39,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:45:39,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:45:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 73114, now seen corresponding path program 1 times [2022-11-25 23:45:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:39,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700973809] [2022-11-25 23:45:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:39,791 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 [2022-11-25 23:45:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:39,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:45:39,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:45:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:40,380 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:45:40,381 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 [2022-11-25 23:45:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:40,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:40,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700973809] [2022-11-25 23:45:40,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700973809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:40,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:40,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:45:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236481445] [2022-11-25 23:45:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:45:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:45:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:45:40,573 INFO L87 Difference]: Start difference. First operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 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) [2022-11-25 23:45:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:41,828 INFO L93 Difference]: Finished difference Result 16781 states and 61213 transitions. [2022-11-25 23:45:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:45:41,831 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 [2022-11-25 23:45:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:42,176 INFO L225 Difference]: With dead ends: 16781 [2022-11-25 23:45:42,178 INFO L226 Difference]: Without dead ends: 16781 [2022-11-25 23:45:42,179 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 [2022-11-25 23:45:42,183 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:42,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:45:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16781 states. [2022-11-25 23:45:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16781 to 16781. [2022-11-25 23:45:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16781 states, 11591 states have (on average 5.281080148390993) internal successors, (61213), 16780 states have internal predecessors, (61213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16781 states to 16781 states and 61213 transitions. [2022-11-25 23:45:43,581 INFO L78 Accepts]: Start accepts. Automaton has 16781 states and 61213 transitions. Word has length 2 [2022-11-25 23:45:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:43,582 INFO L495 AbstractCegarLoop]: Abstraction has 16781 states and 61213 transitions. [2022-11-25 23:45:43,582 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) [2022-11-25 23:45:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 16781 states and 61213 transitions. [2022-11-25 23:45:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:45:43,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:43,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:45:43,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:43,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:43,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:45:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash 73115, now seen corresponding path program 1 times [2022-11-25 23:45:43,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:43,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346682477] [2022-11-25 23:45:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:43,797 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 [2022-11-25 23:45:43,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:43,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:45:43,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:45:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:44,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:44,087 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 [2022-11-25 23:45:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:44,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:44,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:44,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346682477] [2022-11-25 23:45:44,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346682477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:44,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:44,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:45:44,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081079944] [2022-11-25 23:45:44,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:44,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:45:44,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:45:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:45:44,255 INFO L87 Difference]: Start difference. First operand 16781 states and 61213 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) [2022-11-25 23:45:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:45,544 INFO L93 Difference]: Finished difference Result 16784 states and 61219 transitions. [2022-11-25 23:45:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:45:45,545 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 [2022-11-25 23:45:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:45,661 INFO L225 Difference]: With dead ends: 16784 [2022-11-25 23:45:45,661 INFO L226 Difference]: Without dead ends: 16784 [2022-11-25 23:45:45,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:45:45,668 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:45,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:45:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16784 states. [2022-11-25 23:45:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16784 to 16784. [2022-11-25 23:45:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 11594 states have (on average 5.280231154045196) internal successors, (61219), 16783 states have internal predecessors, (61219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 61219 transitions. [2022-11-25 23:45:46,539 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 61219 transitions. Word has length 2 [2022-11-25 23:45:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:46,539 INFO L495 AbstractCegarLoop]: Abstraction has 16784 states and 61219 transitions. [2022-11-25 23:45:46,539 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) [2022-11-25 23:45:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 61219 transitions. [2022-11-25 23:45:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:45:46,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:46,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:45:46,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Ended with exit code 0 [2022-11-25 23:45:46,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:46,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:45:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2281338, now seen corresponding path program 1 times [2022-11-25 23:45:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:46,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166346999] [2022-11-25 23:45:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:46,756 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 [2022-11-25 23:45:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:46,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:45:46,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:46,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:45:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:47,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:47,032 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 [2022-11-25 23:45:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:47,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:47,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166346999] [2022-11-25 23:45:47,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166346999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:47,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1185119065] [2022-11-25 23:45:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:47,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:47,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:47,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-25 23:45:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:45:47,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:47,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:47,717 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 [2022-11-25 23:45:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:47,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:47,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1185119065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:47,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984078294] [2022-11-25 23:45:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:47,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:47,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:47,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:47,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:45:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:45:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:48,158 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:48,159 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 [2022-11-25 23:45:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:48,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984078294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:48,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:45:48,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-25 23:45:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877433417] [2022-11-25 23:45:48,398 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:48,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:45:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:45:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:45:48,400 INFO L87 Difference]: Start difference. First operand 16784 states and 61219 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) [2022-11-25 23:45:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:52,680 INFO L93 Difference]: Finished difference Result 16796 states and 61241 transitions. [2022-11-25 23:45:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:45:52,681 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 [2022-11-25 23:45:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:52,794 INFO L225 Difference]: With dead ends: 16796 [2022-11-25 23:45:52,794 INFO L226 Difference]: Without dead ends: 16796 [2022-11-25 23:45:52,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:45:52,795 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:52,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 23:45:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16796 states. [2022-11-25 23:45:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16796 to 16793. [2022-11-25 23:45:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 11603 states have (on average 5.277686805136603) internal successors, (61237), 16792 states have internal predecessors, (61237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 61237 transitions. [2022-11-25 23:45:53,690 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 61237 transitions. Word has length 3 [2022-11-25 23:45:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:53,690 INFO L495 AbstractCegarLoop]: Abstraction has 16793 states and 61237 transitions. [2022-11-25 23:45:53,691 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) [2022-11-25 23:45:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 61237 transitions. [2022-11-25 23:45:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:45:53,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:53,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:45:53,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:53,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:54,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-25 23:45:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:54,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:45:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2095213421, now seen corresponding path program 1 times [2022-11-25 23:45:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446765057] [2022-11-25 23:45:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:54,305 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 [2022-11-25 23:45:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:54,307 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:45:54,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (7)] Waiting until timeout for monitored process [2022-11-25 23:45:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:45:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:54,429 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 [2022-11-25 23:45:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:54,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:54,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446765057] [2022-11-25 23:45:54,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446765057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:54,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:54,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:45:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002465119] [2022-11-25 23:45:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:54,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:45:54,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:45:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:45:54,438 INFO L87 Difference]: Start difference. First operand 16793 states and 61237 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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) [2022-11-25 23:45:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:55,217 INFO L93 Difference]: Finished difference Result 16790 states and 61234 transitions. [2022-11-25 23:45:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:45:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2022-11-25 23:45:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:55,322 INFO L225 Difference]: With dead ends: 16790 [2022-11-25 23:45:55,322 INFO L226 Difference]: Without dead ends: 16790 [2022-11-25 23:45:55,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:45:55,324 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:55,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:45:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16790 states. [2022-11-25 23:45:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16790 to 16790. [2022-11-25 23:45:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16790 states, 11603 states have (on average 5.277428251314316) internal successors, (61234), 16789 states have internal predecessors, (61234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16790 states to 16790 states and 61234 transitions. [2022-11-25 23:45:56,245 INFO L78 Accepts]: Start accepts. Automaton has 16790 states and 61234 transitions. Word has length 5 [2022-11-25 23:45:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:56,245 INFO L495 AbstractCegarLoop]: Abstraction has 16790 states and 61234 transitions. [2022-11-25 23:45:56,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2022-11-25 23:45:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16790 states and 61234 transitions. [2022-11-25 23:45:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:45:56,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:56,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:45:56,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (7)] Ended with exit code 0 [2022-11-25 23:45:56,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:56,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:45:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2095213420, now seen corresponding path program 1 times [2022-11-25 23:45:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972777698] [2022-11-25 23:45:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:56,448 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 [2022-11-25 23:45:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:56,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:45:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:56,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:45:56,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:56,626 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 5 [2022-11-25 23:45:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:56,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:56,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:56,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972777698] [2022-11-25 23:45:56,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972777698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:56,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:56,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:45:56,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727992293] [2022-11-25 23:45:56,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:56,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:45:56,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:45:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:45:56,653 INFO L87 Difference]: Start difference. First operand 16790 states and 61234 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) [2022-11-25 23:45:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:57,784 INFO L93 Difference]: Finished difference Result 16791 states and 61236 transitions. [2022-11-25 23:45:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:45:57,785 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 [2022-11-25 23:45:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:57,862 INFO L225 Difference]: With dead ends: 16791 [2022-11-25 23:45:57,863 INFO L226 Difference]: Without dead ends: 16791 [2022-11-25 23:45:57,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:45:57,864 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 91 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:57,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 7 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:45:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16791 states. [2022-11-25 23:45:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16791 to 16791. [2022-11-25 23:45:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16791 states, 11604 states have (on average 5.277145811789039) internal successors, (61236), 16790 states have internal predecessors, (61236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 61236 transitions. [2022-11-25 23:45:58,488 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 61236 transitions. Word has length 5 [2022-11-25 23:45:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:58,489 INFO L495 AbstractCegarLoop]: Abstraction has 16791 states and 61236 transitions. [2022-11-25 23:45:58,489 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) [2022-11-25 23:45:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 61236 transitions. [2022-11-25 23:45:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:45:58,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:58,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:45:58,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:58,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:45:58,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:45:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash -527094042, now seen corresponding path program 1 times [2022-11-25 23:45:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127190131] [2022-11-25 23:45:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:58,704 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 [2022-11-25 23:45:58,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:58,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:45:58,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Waiting until timeout for monitored process [2022-11-25 23:45:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:59,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:45:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:59,054 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 5 [2022-11-25 23:45:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:59,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:59,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127190131] [2022-11-25 23:45:59,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127190131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:59,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260744792] [2022-11-25 23:45:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:59,455 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:59,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:59,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:59,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-25 23:45:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:45:59,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:59,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:59,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260744792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:59,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:45:59,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 10 [2022-11-25 23:45:59,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080195774] [2022-11-25 23:45:59,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:59,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:45:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:45:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:45:59,827 INFO L87 Difference]: Start difference. First operand 16791 states and 61236 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:01,696 INFO L93 Difference]: Finished difference Result 33573 states and 122456 transitions. [2022-11-25 23:46:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:46:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:46:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:01,899 INFO L225 Difference]: With dead ends: 33573 [2022-11-25 23:46:01,899 INFO L226 Difference]: Without dead ends: 33573 [2022-11-25 23:46:01,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:46:01,900 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 85 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:01,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 16 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:46:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33573 states. [2022-11-25 23:46:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33573 to 16802. [2022-11-25 23:46:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16802 states, 11615 states have (on average 5.274128282393456) internal successors, (61259), 16801 states have internal predecessors, (61259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16802 states to 16802 states and 61259 transitions. [2022-11-25 23:46:03,210 INFO L78 Accepts]: Start accepts. Automaton has 16802 states and 61259 transitions. Word has length 6 [2022-11-25 23:46:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:03,210 INFO L495 AbstractCegarLoop]: Abstraction has 16802 states and 61259 transitions. [2022-11-25 23:46:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:03,211 INFO L276 IsEmpty]: Start isEmpty. Operand 16802 states and 61259 transitions. [2022-11-25 23:46:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:46:03,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:03,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:46:03,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-11-25 23:46:03,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:03,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:03,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:46:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash -527088697, now seen corresponding path program 1 times [2022-11-25 23:46:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398286856] [2022-11-25 23:46:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:03,616 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 [2022-11-25 23:46:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:03,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:46:03,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:46:03,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:03,798 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 5 [2022-11-25 23:46:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:03,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:46:03,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:03,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398286856] [2022-11-25 23:46:03,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398286856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:03,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:03,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:46:03,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194536196] [2022-11-25 23:46:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:46:03,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:46:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:46:03,821 INFO L87 Difference]: Start difference. First operand 16802 states and 61259 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:04,717 INFO L93 Difference]: Finished difference Result 16803 states and 61261 transitions. [2022-11-25 23:46:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:46:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:46:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:04,793 INFO L225 Difference]: With dead ends: 16803 [2022-11-25 23:46:04,794 INFO L226 Difference]: Without dead ends: 16803 [2022-11-25 23:46:04,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:46:04,795 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:04,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 8 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:46:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16803 states. [2022-11-25 23:46:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16803 to 16803. [2022-11-25 23:46:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 11616 states have (on average 5.2738464187327825) internal successors, (61261), 16802 states have internal predecessors, (61261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 61261 transitions. [2022-11-25 23:46:05,531 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 61261 transitions. Word has length 6 [2022-11-25 23:46:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:05,532 INFO L495 AbstractCegarLoop]: Abstraction has 16803 states and 61261 transitions. [2022-11-25 23:46:05,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 61261 transitions. [2022-11-25 23:46:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:46:05,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:05,533 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:46:05,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:05,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:05,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:46:05,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash -741466789, now seen corresponding path program 2 times [2022-11-25 23:46:05,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:05,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747177147] [2022-11-25 23:46:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:46:05,746 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 [2022-11-25 23:46:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:05,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:46:05,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (12)] Waiting until timeout for monitored process [2022-11-25 23:46:05,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:46:05,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:46:05,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:06,034 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:46:06,034 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 [2022-11-25 23:46:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:06,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:07,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747177147] [2022-11-25 23:46:07,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747177147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811895090] [2022-11-25 23:46:07,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:46:07,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:46:07,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:46:07,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:46:07,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-25 23:46:07,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:46:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:07,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:46:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:07,761 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:46:07,761 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 [2022-11-25 23:46:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:07,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:08,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811895090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:08,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464605496] [2022-11-25 23:46:08,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:46:08,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:08,052 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:08,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:46:08,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:46:08,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:46:08,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:08,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:46:08,359 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 [2022-11-25 23:46:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:08,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:08,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464605496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:08,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:46:08,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-25 23:46:08,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239280746] [2022-11-25 23:46:08,639 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:08,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:46:08,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:08,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:46:08,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:46:08,640 INFO L87 Difference]: Start difference. First operand 16803 states and 61261 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:12,735 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 [] [2022-11-25 23:46:14,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:16,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:17,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:20,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:21,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:23,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:26,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:28,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:31,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:35,912 INFO L93 Difference]: Finished difference Result 16834 states and 61321 transitions. [2022-11-25 23:46:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:46:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:46:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:35,996 INFO L225 Difference]: With dead ends: 16834 [2022-11-25 23:46:35,997 INFO L226 Difference]: Without dead ends: 16834 [2022-11-25 23:46:35,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:46:35,998 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 164 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:35,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 761 Invalid, 3 Unknown, 0 Unchecked, 25.6s Time] [2022-11-25 23:46:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2022-11-25 23:46:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 16829. [2022-11-25 23:46:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16829 states, 11642 states have (on average 5.266706751417282) internal successors, (61315), 16828 states have internal predecessors, (61315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16829 states to 16829 states and 61315 transitions. [2022-11-25 23:46:36,704 INFO L78 Accepts]: Start accepts. Automaton has 16829 states and 61315 transitions. Word has length 6 [2022-11-25 23:46:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:36,704 INFO L495 AbstractCegarLoop]: Abstraction has 16829 states and 61315 transitions. [2022-11-25 23:46:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 16829 states and 61315 transitions. [2022-11-25 23:46:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:46:36,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:36,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:36,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:36,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:37,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:37,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:37,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:46:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash 840134140, now seen corresponding path program 1 times [2022-11-25 23:46:37,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:37,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894363784] [2022-11-25 23:46:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:37,313 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 [2022-11-25 23:46:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:37,314 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:46:37,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:37,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:46:37,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:37,508 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 [2022-11-25 23:46:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:37,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:46:37,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894363784] [2022-11-25 23:46:37,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894363784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:37,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:37,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:46:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968297432] [2022-11-25 23:46:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:46:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:46:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:46:37,543 INFO L87 Difference]: Start difference. First operand 16829 states and 61315 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-25 23:46:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:39,113 INFO L93 Difference]: Finished difference Result 33595 states and 122508 transitions. [2022-11-25 23:46:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:46:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-25 23:46:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:39,555 INFO L225 Difference]: With dead ends: 33595 [2022-11-25 23:46:39,555 INFO L226 Difference]: Without dead ends: 33595 [2022-11-25 23:46:39,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:46:39,556 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 236 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:39,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 6 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 23:46:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33595 states. [2022-11-25 23:46:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33595 to 16830. [2022-11-25 23:46:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16830 states, 11643 states have (on average 5.266597955853302) internal successors, (61319), 16829 states have internal predecessors, (61319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16830 states to 16830 states and 61319 transitions. [2022-11-25 23:46:40,368 INFO L78 Accepts]: Start accepts. Automaton has 16830 states and 61319 transitions. Word has length 7 [2022-11-25 23:46:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:40,369 INFO L495 AbstractCegarLoop]: Abstraction has 16830 states and 61319 transitions. [2022-11-25 23:46:40,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-25 23:46:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16830 states and 61319 transitions. [2022-11-25 23:46:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:46:40,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:40,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:40,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:40,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:46:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash 840134582, now seen corresponding path program 1 times [2022-11-25 23:46:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:40,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516594528] [2022-11-25 23:46:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:40,583 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 [2022-11-25 23:46:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:40,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:46:40,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (16)] Waiting until timeout for monitored process [2022-11-25 23:46:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:46:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:40,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:46:40,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:40,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516594528] [2022-11-25 23:46:40,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516594528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:40,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:40,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:46:40,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075638408] [2022-11-25 23:46:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:46:40,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:46:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:46:40,761 INFO L87 Difference]: Start difference. First operand 16830 states and 61319 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-25 23:46:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:41,641 INFO L93 Difference]: Finished difference Result 16809 states and 61274 transitions. [2022-11-25 23:46:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:46:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-25 23:46:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:41,701 INFO L225 Difference]: With dead ends: 16809 [2022-11-25 23:46:41,702 INFO L226 Difference]: Without dead ends: 16809 [2022-11-25 23:46:41,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:46:41,702 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:41,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:46:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16809 states. [2022-11-25 23:46:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16809 to 16809. [2022-11-25 23:46:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16809 states, 11622 states have (on average 5.272242299087937) internal successors, (61274), 16808 states have internal predecessors, (61274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16809 states to 16809 states and 61274 transitions. [2022-11-25 23:46:42,331 INFO L78 Accepts]: Start accepts. Automaton has 16809 states and 61274 transitions. Word has length 7 [2022-11-25 23:46:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:42,332 INFO L495 AbstractCegarLoop]: Abstraction has 16809 states and 61274 transitions. [2022-11-25 23:46:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-25 23:46:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 16809 states and 61274 transitions. [2022-11-25 23:46:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:46:42,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:42,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:42,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:42,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:42,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:46:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1296246459, now seen corresponding path program 1 times [2022-11-25 23:46:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:42,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937942895] [2022-11-25 23:46:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:42,535 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 [2022-11-25 23:46:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:42,537 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:46:42,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:42,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:46:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:42,714 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 5 [2022-11-25 23:46:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:46:42,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:46:43,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937942895] [2022-11-25 23:46:43,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937942895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1855884437] [2022-11-25 23:46:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:43,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:46:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:46:43,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:46:43,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-25 23:46:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:43,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:46:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:43,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:43,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1855884437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:43,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131175854] [2022-11-25 23:46:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:43,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:43,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:43,779 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:43,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:46:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:46:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:44,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:46:44,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131175854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:44,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-25 23:46:44,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 5, 5] total 19 [2022-11-25 23:46:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898928587] [2022-11-25 23:46:44,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:44,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:46:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:46:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:46:44,025 INFO L87 Difference]: Start difference. First operand 16809 states and 61274 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2022-11-25 23:46:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:44,931 INFO L93 Difference]: Finished difference Result 16809 states and 61273 transitions. [2022-11-25 23:46:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:46:44,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2022-11-25 23:46:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:44,997 INFO L225 Difference]: With dead ends: 16809 [2022-11-25 23:46:44,997 INFO L226 Difference]: Without dead ends: 16809 [2022-11-25 23:46:44,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:46:44,998 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:44,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 10 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:46:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16809 states. [2022-11-25 23:46:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16809 to 16809. [2022-11-25 23:46:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16809 states, 11622 states have (on average 5.272156255377732) internal successors, (61273), 16808 states have internal predecessors, (61273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16809 states to 16809 states and 61273 transitions. [2022-11-25 23:46:45,556 INFO L78 Accepts]: Start accepts. Automaton has 16809 states and 61273 transitions. Word has length 7 [2022-11-25 23:46:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:45,556 INFO L495 AbstractCegarLoop]: Abstraction has 16809 states and 61273 transitions. [2022-11-25 23:46:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2022-11-25 23:46:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16809 states and 61273 transitions. [2022-11-25 23:46:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:46:45,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:45,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:45,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:46:45,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:45,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:46:46,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:46:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1609048285, now seen corresponding path program 1 times [2022-11-25 23:46:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:46,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554810916] [2022-11-25 23:46:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:46,159 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 [2022-11-25 23:46:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:46,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:46:46,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (20)] Waiting until timeout for monitored process [2022-11-25 23:46:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:46:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:46,368 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 5 [2022-11-25 23:46:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:46,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:46,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554810916] [2022-11-25 23:46:46,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554810916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042518635] [2022-11-25 23:46:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:46,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:46:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:46:46,770 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:46:46,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-25 23:46:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:47,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:46:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:46:47,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:46:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042518635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769842885] [2022-11-25 23:46:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:47,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:47,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:47,548 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:47,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 23:46:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:47,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:46:47,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:47,717 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 5 [2022-11-25 23:46:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:47,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:48,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769842885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:48,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:46:48,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 3, 3] total 19 [2022-11-25 23:46:48,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527649359] [2022-11-25 23:46:48,201 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:48,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:46:48,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:48,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:46:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:46:48,202 INFO L87 Difference]: Start difference. First operand 16809 states and 61273 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:52,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:54,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:56,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:46:58,301 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 [] [2022-11-25 23:47:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:07,779 INFO L93 Difference]: Finished difference Result 134209 states and 489696 transitions. [2022-11-25 23:47:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 23:47:07,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:47:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:08,968 INFO L225 Difference]: With dead ends: 134209 [2022-11-25 23:47:08,968 INFO L226 Difference]: Without dead ends: 134209 [2022-11-25 23:47:08,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:47:08,970 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3829 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:08,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 57 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2022-11-25 23:47:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134209 states. [2022-11-25 23:47:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134209 to 16840. [2022-11-25 23:47:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16840 states, 11653 states have (on average 5.263966360593838) internal successors, (61341), 16839 states have internal predecessors, (61341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16840 states to 16840 states and 61341 transitions. [2022-11-25 23:47:11,084 INFO L78 Accepts]: Start accepts. Automaton has 16840 states and 61341 transitions. Word has length 8 [2022-11-25 23:47:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:11,085 INFO L495 AbstractCegarLoop]: Abstraction has 16840 states and 61341 transitions. [2022-11-25 23:47:11,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 16840 states and 61341 transitions. [2022-11-25 23:47:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:47:11,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:11,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:11,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:11,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:11,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:11,690 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:47:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash -106605947, now seen corresponding path program 1 times [2022-11-25 23:47:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:47:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542087827] [2022-11-25 23:47:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:11,691 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 [2022-11-25 23:47:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:47:11,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:47:11,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Waiting until timeout for monitored process [2022-11-25 23:47:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:47:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:11,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:47:11,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:47:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542087827] [2022-11-25 23:47:11,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542087827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:11,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:11,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:47:11,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652890933] [2022-11-25 23:47:11,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:11,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:47:11,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:47:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:47:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:47:11,920 INFO L87 Difference]: Start difference. First operand 16840 states and 61341 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-25 23:47:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:12,804 INFO L93 Difference]: Finished difference Result 16840 states and 61339 transitions. [2022-11-25 23:47:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:47:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:47:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:12,867 INFO L225 Difference]: With dead ends: 16840 [2022-11-25 23:47:12,867 INFO L226 Difference]: Without dead ends: 16840 [2022-11-25 23:47:12,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:47:12,867 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:12,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 12 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:47:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16840 states. [2022-11-25 23:47:13,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16840 to 16840. [2022-11-25 23:47:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16840 states, 11653 states have (on average 5.263794730970566) internal successors, (61339), 16839 states have internal predecessors, (61339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16840 states to 16840 states and 61339 transitions. [2022-11-25 23:47:13,495 INFO L78 Accepts]: Start accepts. Automaton has 16840 states and 61339 transitions. Word has length 10 [2022-11-25 23:47:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:13,495 INFO L495 AbstractCegarLoop]: Abstraction has 16840 states and 61339 transitions. [2022-11-25 23:47:13,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-25 23:47:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 16840 states and 61339 transitions. [2022-11-25 23:47:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:47:13,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:13,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:13,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:13,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:47:13,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:47:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash 796423458, now seen corresponding path program 1 times [2022-11-25 23:47:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:47:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282406646] [2022-11-25 23:47:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:13,700 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 [2022-11-25 23:47:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:47:13,707 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:47:13,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (24)] Waiting until timeout for monitored process [2022-11-25 23:47:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:47:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:14,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:14,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:47:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282406646] [2022-11-25 23:47:14,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282406646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:14,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020599630] [2022-11-25 23:47:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:14,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:47:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:47:14,351 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:47:14,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-25 23:47:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:47:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:14,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1020599630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019224130] [2022-11-25 23:47:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:15,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:15,087 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:15,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:47:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:47:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:15,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:47:15,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019224130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:15,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:47:15,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 21 [2022-11-25 23:47:15,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9551170] [2022-11-25 23:47:15,705 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:15,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:47:15,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:47:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:47:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:47:15,707 INFO L87 Difference]: Start difference. First operand 16840 states and 61339 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:21,151 INFO L93 Difference]: Finished difference Result 67218 states and 245071 transitions. [2022-11-25 23:47:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:47:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:47:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:21,490 INFO L225 Difference]: With dead ends: 67218 [2022-11-25 23:47:21,490 INFO L226 Difference]: Without dead ends: 67218 [2022-11-25 23:47:21,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:47:21,491 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2199 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:21,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2199 Valid, 45 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 23:47:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67218 states. [2022-11-25 23:47:22,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67218 to 16840. [2022-11-25 23:47:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16840 states, 11653 states have (on average 5.26345147172402) internal successors, (61335), 16839 states have internal predecessors, (61335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16840 states to 16840 states and 61335 transitions. [2022-11-25 23:47:22,927 INFO L78 Accepts]: Start accepts. Automaton has 16840 states and 61335 transitions. Word has length 11 [2022-11-25 23:47:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:22,927 INFO L495 AbstractCegarLoop]: Abstraction has 16840 states and 61335 transitions. [2022-11-25 23:47:22,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16840 states and 61335 transitions. [2022-11-25 23:47:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:47:22,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:22,928 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2022-11-25 23:47:22,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:23,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:23,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:23,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:23,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:47:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash -828471932, now seen corresponding path program 1 times [2022-11-25 23:47:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:47:23,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007726627] [2022-11-25 23:47:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:23,531 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 [2022-11-25 23:47:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:47:23,532 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:47:23,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:47:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:23,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:47:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:23,721 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 [2022-11-25 23:47:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:24,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:26,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:47:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007726627] [2022-11-25 23:47:26,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007726627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14958852] [2022-11-25 23:47:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:26,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:47:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:47:26,342 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:47:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-25 23:47:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:47:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:26,760 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 [2022-11-25 23:47:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:28,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14958852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685308611] [2022-11-25 23:47:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:28,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:28,054 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:28,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 23:47:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:47:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:28,300 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 [2022-11-25 23:47:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:28,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:28,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685308611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:28,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:47:28,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 27 [2022-11-25 23:47:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666775703] [2022-11-25 23:47:28,822 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:28,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 23:47:28,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:47:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 23:47:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:47:28,824 INFO L87 Difference]: Start difference. First operand 16840 states and 61335 transitions. Second operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 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) [2022-11-25 23:47:35,225 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 [] [2022-11-25 23:47:37,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:39,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:41,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:43,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:45,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:46,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:48,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:55,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:57,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:59,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:48:01,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:48:03,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:48:05,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:48:07,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:48:09,827 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 [] [2022-11-25 23:48:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:18,554 INFO L93 Difference]: Finished difference Result 16871 states and 61392 transitions. [2022-11-25 23:48:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:48:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 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 12 [2022-11-25 23:48:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:18,620 INFO L225 Difference]: With dead ends: 16871 [2022-11-25 23:48:18,620 INFO L226 Difference]: Without dead ends: 16871 [2022-11-25 23:48:18,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:48:18,622 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 238 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:18,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 42 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1692 Invalid, 14 Unknown, 0 Unchecked, 40.8s Time] [2022-11-25 23:48:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16871 states. [2022-11-25 23:48:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16871 to 16863. [2022-11-25 23:48:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16863 states, 11676 states have (on average 5.256851661527921) internal successors, (61379), 16862 states have internal predecessors, (61379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16863 states to 16863 states and 61379 transitions. [2022-11-25 23:48:19,132 INFO L78 Accepts]: Start accepts. Automaton has 16863 states and 61379 transitions. Word has length 12 [2022-11-25 23:48:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:19,132 INFO L495 AbstractCegarLoop]: Abstraction has 16863 states and 61379 transitions. [2022-11-25 23:48:19,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 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) [2022-11-25 23:48:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 16863 states and 61379 transitions. [2022-11-25 23:48:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:48:19,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:19,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:19,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:48:19,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:19,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:19,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:19,739 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:48:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 854757267, now seen corresponding path program 1 times [2022-11-25 23:48:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:48:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12464866] [2022-11-25 23:48:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:19,740 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 [2022-11-25 23:48:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:48:19,742 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:48:19,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (30)] Waiting until timeout for monitored process [2022-11-25 23:48:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:48:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:20,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:20,346 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-25 23:48:20,346 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 [2022-11-25 23:48:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:20,450 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 20 [2022-11-25 23:48:20,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:20,608 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:48:20,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-25 23:48:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:20,796 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:48:20,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-25 23:48:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:21,095 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:48:21,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 55 [2022-11-25 23:48:23,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:23,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:23,223 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-25 23:48:23,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-25 23:48:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:48:26,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:26,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:48:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12464866] [2022-11-25 23:48:26,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12464866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:26,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:26,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:48:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965832823] [2022-11-25 23:48:26,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:26,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:48:26,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:48:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:48:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:26,783 INFO L87 Difference]: Start difference. First operand 16863 states and 61379 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:31,991 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 [0] [2022-11-25 23:48:33,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:48:35,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:48:37,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:48:38,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:48:40,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:48:43,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:48:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:44,153 INFO L93 Difference]: Finished difference Result 13252 states and 46916 transitions. [2022-11-25 23:48:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:48:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:48:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:44,208 INFO L225 Difference]: With dead ends: 13252 [2022-11-25 23:48:44,208 INFO L226 Difference]: Without dead ends: 13252 [2022-11-25 23:48:44,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:48:44,209 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 244 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:44,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 3 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2022-11-25 23:48:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13252 states. [2022-11-25 23:48:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13252 to 13252. [2022-11-25 23:48:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 9587 states have (on average 4.893710232606655) internal successors, (46916), 13251 states have internal predecessors, (46916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 46916 transitions. [2022-11-25 23:48:44,512 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 46916 transitions. Word has length 13 [2022-11-25 23:48:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:44,513 INFO L495 AbstractCegarLoop]: Abstraction has 13252 states and 46916 transitions. [2022-11-25 23:48:44,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 46916 transitions. [2022-11-25 23:48:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:48:44,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:44,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:44,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (30)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:48:44,714 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:48:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash 854757268, now seen corresponding path program 1 times [2022-11-25 23:48:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:48:44,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844955957] [2022-11-25 23:48:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:44,715 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 [2022-11-25 23:48:44,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:48:44,716 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:48:44,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:48:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:48:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,290 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:48:45,291 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 [2022-11-25 23:48:45,331 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 23:48:45,331 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 [2022-11-25 23:48:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,414 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 [2022-11-25 23:48:45,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,467 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 [2022-11-25 23:48:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,521 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 [2022-11-25 23:48:45,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,586 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 [2022-11-25 23:48:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:48:45,645 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 [2022-11-25 23:48:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:48:45,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:45,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:48:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844955957] [2022-11-25 23:48:45,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844955957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:45,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:45,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005923899] [2022-11-25 23:48:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:45,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:48:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:48:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:48:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:48:45,878 INFO L87 Difference]: Start difference. First operand 13252 states and 46916 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:46,677 INFO L93 Difference]: Finished difference Result 9641 states and 32453 transitions. [2022-11-25 23:48:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:48:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:46,706 INFO L225 Difference]: With dead ends: 9641 [2022-11-25 23:48:46,706 INFO L226 Difference]: Without dead ends: 9641 [2022-11-25 23:48:46,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:48:46,707 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 153 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:46,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 3 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:48:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2022-11-25 23:48:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 9641. [2022-11-25 23:48:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9641 states, 7498 states have (on average 4.328220858895706) internal successors, (32453), 9640 states have internal predecessors, (32453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 32453 transitions. [2022-11-25 23:48:46,886 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 32453 transitions. Word has length 13 [2022-11-25 23:48:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:46,887 INFO L495 AbstractCegarLoop]: Abstraction has 9641 states and 32453 transitions. [2022-11-25 23:48:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 32453 transitions. [2022-11-25 23:48:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:48:46,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:46,887 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:46,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:48:47,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:48:47,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:48:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1661535271, now seen corresponding path program 1 times [2022-11-25 23:48:47,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:48:47,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124183070] [2022-11-25 23:48:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:47,089 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 [2022-11-25 23:48:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:48:47,090 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:48:47,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (32)] Waiting until timeout for monitored process [2022-11-25 23:48:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:48:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:47,330 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 5 [2022-11-25 23:48:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:48:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:48:48,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:48:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124183070] [2022-11-25 23:48:48,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124183070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1941933854] [2022-11-25 23:48:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:48:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:48:48,505 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:48:48,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-25 23:48:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:48:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:48:49,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:48:50,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1941933854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143543509] [2022-11-25 23:48:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:50,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:50,411 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:50,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 23:48:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:48:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:51,091 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 5 [2022-11-25 23:48:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:48:51,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:48:52,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143543509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:52,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:48:52,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 36 [2022-11-25 23:48:52,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390498480] [2022-11-25 23:48:52,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:52,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 23:48:52,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:48:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 23:48:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:48:52,464 INFO L87 Difference]: Start difference. First operand 9641 states and 32453 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:57,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:48:59,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:01,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:03,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:08,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:10,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:12,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:14,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:17,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:19,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:21,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:23,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:25,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:27,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:30,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:33,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:35,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:37,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:39,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:42,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:44,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:48,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:53,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:49:59,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:50:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:31,158 INFO L93 Difference]: Finished difference Result 66968 states and 226198 transitions. [2022-11-25 23:50:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 23:50:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:50:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:31,696 INFO L225 Difference]: With dead ends: 66968 [2022-11-25 23:50:31,696 INFO L226 Difference]: Without dead ends: 66968 [2022-11-25 23:50:31,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=805, Invalid=4025, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 23:50:31,697 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1592 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4469 mSolverCounterSat, 107 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 4592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 4469 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:31,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1592 Valid, 178 Invalid, 4592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 4469 Invalid, 16 Unknown, 0 Unchecked, 84.9s Time] [2022-11-25 23:50:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66968 states. [2022-11-25 23:50:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66968 to 9688. [2022-11-25 23:50:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 7545 states have (on average 4.3131875414181575) internal successors, (32543), 9687 states have internal predecessors, (32543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 32543 transitions. [2022-11-25 23:50:32,516 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 32543 transitions. Word has length 13 [2022-11-25 23:50:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:32,517 INFO L495 AbstractCegarLoop]: Abstraction has 9688 states and 32543 transitions. [2022-11-25 23:50:32,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 32543 transitions. [2022-11-25 23:50:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:50:32,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:32,518 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-25 23:50:32,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:32,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (32)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:32,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:33,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:33,133 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:50:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1024344038, now seen corresponding path program 3 times [2022-11-25 23:50:33,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:50:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646988726] [2022-11-25 23:50:33,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:50:33,134 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 [2022-11-25 23:50:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:50:33,137 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:50:33,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (35)] Waiting until timeout for monitored process [2022-11-25 23:50:33,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 23:50:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:50:33,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:33,588 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:50:33,589 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 [2022-11-25 23:50:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:34,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:37,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:50:37,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646988726] [2022-11-25 23:50:37,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646988726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:37,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840385589] [2022-11-25 23:50:37,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:50:37,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:50:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:50:37,725 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:50:37,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-25 23:50:39,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 23:50:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:50:39,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:39,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:50:39,263 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 [2022-11-25 23:50:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:39,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:39,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840385589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833310813] [2022-11-25 23:50:39,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:50:39,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:39,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:39,951 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:39,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 23:50:45,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 23:50:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:50:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:45,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:50:45,897 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 [2022-11-25 23:50:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:46,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:46,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833310813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:46,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:50:46,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 24 [2022-11-25 23:50:46,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942350922] [2022-11-25 23:50:46,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:46,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:50:46,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:50:46,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:50:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:50:46,577 INFO L87 Difference]: Start difference. First operand 9688 states and 32543 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:03,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:05,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:07,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:09,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:11,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:13,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:15,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:17,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:19,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:21,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:23,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:32,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:34,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:36,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:38,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:40,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:42,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:44,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:46,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:48,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:50,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:51:52,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:03,763 INFO L93 Difference]: Finished difference Result 9727 states and 32615 transitions. [2022-11-25 23:52:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:52:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:52:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:03,790 INFO L225 Difference]: With dead ends: 9727 [2022-11-25 23:52:03,790 INFO L226 Difference]: Without dead ends: 9727 [2022-11-25 23:52:03,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:52:03,791 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 688 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:03,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 45 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 2010 Invalid, 21 Unknown, 0 Unchecked, 57.2s Time] [2022-11-25 23:52:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2022-11-25 23:52:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 9710. [2022-11-25 23:52:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9710 states, 7567 states have (on average 4.306462270384564) internal successors, (32587), 9709 states have internal predecessors, (32587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9710 states to 9710 states and 32587 transitions. [2022-11-25 23:52:03,967 INFO L78 Accepts]: Start accepts. Automaton has 9710 states and 32587 transitions. Word has length 13 [2022-11-25 23:52:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:03,967 INFO L495 AbstractCegarLoop]: Abstraction has 9710 states and 32587 transitions. [2022-11-25 23:52:03,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9710 states and 32587 transitions. [2022-11-25 23:52:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:52:03,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:03,968 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:03,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:04,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (35)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:04,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:04,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:04,569 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:52:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 723494619, now seen corresponding path program 1 times [2022-11-25 23:52:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758307474] [2022-11-25 23:52:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:04,570 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 [2022-11-25 23:52:04,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:04,571 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:52:04,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Waiting until timeout for monitored process [2022-11-25 23:52:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:04,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:52:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:04,808 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 5 [2022-11-25 23:52:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:52:04,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:52:06,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758307474] [2022-11-25 23:52:06,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758307474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1449222452] [2022-11-25 23:52:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:06,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:06,028 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:06,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-25 23:52:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:06,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:52:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:52:06,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:52:07,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1449222452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:07,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621600016] [2022-11-25 23:52:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:07,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:07,415 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 23:52:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:52:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:07,699 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 5 [2022-11-25 23:52:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:52:09,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621600016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:09,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:09,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 7, 9, 9] total 34 [2022-11-25 23:52:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081569175] [2022-11-25 23:52:09,854 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 23:52:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 23:52:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:52:09,856 INFO L87 Difference]: Start difference. First operand 9710 states and 32587 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:15,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:18,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:19,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:21,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:23,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:27,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:29,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:32,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:34,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:36,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:38,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:40,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:44,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:52:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:56,568 INFO L93 Difference]: Finished difference Result 28964 states and 97435 transitions. [2022-11-25 23:52:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 23:52:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:52:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:56,803 INFO L225 Difference]: With dead ends: 28964 [2022-11-25 23:52:56,803 INFO L226 Difference]: Without dead ends: 28964 [2022-11-25 23:52:56,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=796, Invalid=3896, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 23:52:56,805 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 816 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 113 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:56,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 64 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1522 Invalid, 10 Unknown, 0 Unchecked, 35.6s Time] [2022-11-25 23:52:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28964 states. [2022-11-25 23:52:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28964 to 9854. [2022-11-25 23:52:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9854 states, 7711 states have (on average 4.2615743742705225) internal successors, (32861), 9853 states have internal predecessors, (32861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9854 states to 9854 states and 32861 transitions. [2022-11-25 23:52:57,111 INFO L78 Accepts]: Start accepts. Automaton has 9854 states and 32861 transitions. Word has length 14 [2022-11-25 23:52:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:57,111 INFO L495 AbstractCegarLoop]: Abstraction has 9854 states and 32861 transitions. [2022-11-25 23:52:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 9854 states and 32861 transitions. [2022-11-25 23:52:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:52:57,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:57,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:57,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:57,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:57,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:57,713 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:52:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029173, now seen corresponding path program 1 times [2022-11-25 23:52:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:57,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381827257] [2022-11-25 23:52:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:57,714 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 [2022-11-25 23:52:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:57,715 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:52:57,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Waiting until timeout for monitored process [2022-11-25 23:52:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:58,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:52:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:58,201 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 [2022-11-25 23:52:58,238 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:52:58,239 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 [2022-11-25 23:52:58,278 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:52:58,278 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 [2022-11-25 23:52:58,310 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:52:58,310 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 [2022-11-25 23:52:58,332 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:52:58,333 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 [2022-11-25 23:52:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:52:58,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:58,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:58,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381827257] [2022-11-25 23:52:58,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381827257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:58,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:58,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:52:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712045740] [2022-11-25 23:52:58,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:58,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:58,374 INFO L87 Difference]: Start difference. First operand 9854 states and 32861 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:59,130 INFO L93 Difference]: Finished difference Result 8208 states and 27184 transitions. [2022-11-25 23:52:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:52:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:59,153 INFO L225 Difference]: With dead ends: 8208 [2022-11-25 23:52:59,153 INFO L226 Difference]: Without dead ends: 8208 [2022-11-25 23:52:59,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:52:59,154 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 219 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:59,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 2 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:52:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8208 states. [2022-11-25 23:52:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8208 to 8208. [2022-11-25 23:52:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8208 states, 6526 states have (on average 4.165491878639289) internal successors, (27184), 8207 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8208 states to 8208 states and 27184 transitions. [2022-11-25 23:52:59,459 INFO L78 Accepts]: Start accepts. Automaton has 8208 states and 27184 transitions. Word has length 15 [2022-11-25 23:52:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:59,459 INFO L495 AbstractCegarLoop]: Abstraction has 8208 states and 27184 transitions. [2022-11-25 23:52:59,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:52:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8208 states and 27184 transitions. [2022-11-25 23:52:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:52:59,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:59,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:59,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Ended with exit code 0 [2022-11-25 23:52:59,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:52:59,664 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:52:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029174, now seen corresponding path program 1 times [2022-11-25 23:52:59,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:59,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635579986] [2022-11-25 23:52:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:59,665 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 [2022-11-25 23:52:59,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:59,666 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:52:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (42)] Waiting until timeout for monitored process [2022-11-25 23:53:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:53:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:00,152 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 [2022-11-25 23:53:00,160 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 [2022-11-25 23:53:00,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:00,314 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 [2022-11-25 23:53:00,355 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:53:00,356 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 [2022-11-25 23:53:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:00,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-25 23:53:00,570 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:53:00,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 23:53:00,724 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:53:00,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 23:53:00,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-25 23:53:00,856 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 23:53:00,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 23:53:00,867 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 [2022-11-25 23:53:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:53:01,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:16,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:53:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:53:16,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:53:16,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:53:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:53:16,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:16,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635579986] [2022-11-25 23:53:16,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635579986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:16,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263209996] [2022-11-25 23:53:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:16,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:53:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:53:16,532 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:53:16,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-25 23:53:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:53:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:17,272 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 [2022-11-25 23:53:17,282 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 [2022-11-25 23:53:17,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:17,552 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 [2022-11-25 23:53:17,581 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:53:17,581 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 [2022-11-25 23:53:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:17,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-25 23:53:17,779 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:53:17,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 23:53:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:18,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-25 23:53:18,159 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-25 23:53:18,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-25 23:53:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:18,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-25 23:53:18,611 INFO L321 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2022-11-25 23:53:18,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 40 [2022-11-25 23:53:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:53:18,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:53:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263209996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61710430] [2022-11-25 23:53:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:53,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:53,836 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:53,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 23:53:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:54,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:53:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:54,129 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 23:53:54,145 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 [2022-11-25 23:53:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:54,199 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 [2022-11-25 23:53:54,225 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:53:54,225 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 [2022-11-25 23:53:54,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:54,443 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:53:54,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:53:54,468 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 [2022-11-25 23:53:54,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:54,535 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 [2022-11-25 23:53:54,569 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:53:54,569 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 [2022-11-25 23:53:54,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:54,620 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 [2022-11-25 23:53:54,632 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:53:54,632 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 [2022-11-25 23:53:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:53:54,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:54:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61710430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:23,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:23,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7, 7, 5, 7] total 24 [2022-11-25 23:54:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682761821] [2022-11-25 23:54:23,841 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:54:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:54:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=450, Unknown=20, NotChecked=0, Total=600 [2022-11-25 23:54:23,843 INFO L87 Difference]: Start difference. First operand 8208 states and 27184 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:37,809 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:54:42,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:54:51,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:54:53,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:54:55,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:54:57,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:54:59,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:55:06,595 WARN L233 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:55:08,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:55:10,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:55:12,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 23:55:18,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:55:37,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:55:38,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:55:40,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:55:42,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:55:45,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 23:55:47,541 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] [2022-11-25 23:56:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:04,163 INFO L93 Difference]: Finished difference Result 14684 states and 49137 transitions. [2022-11-25 23:56:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:56:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:04,209 INFO L225 Difference]: With dead ends: 14684 [2022-11-25 23:56:04,209 INFO L226 Difference]: Without dead ends: 14684 [2022-11-25 23:56:04,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 126.9s TimeCoverageRelationStatistics Valid=288, Invalid=946, Unknown=26, NotChecked=0, Total=1260 [2022-11-25 23:56:04,210 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 690 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 60 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:04,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 2 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1123 Invalid, 12 Unknown, 0 Unchecked, 51.3s Time] [2022-11-25 23:56:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14684 states. [2022-11-25 23:56:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14684 to 8146. [2022-11-25 23:56:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8146 states, 6596 states have (on average 4.157822922983627) internal successors, (27425), 8145 states have internal predecessors, (27425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 27425 transitions. [2022-11-25 23:56:04,391 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 27425 transitions. Word has length 15 [2022-11-25 23:56:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:04,391 INFO L495 AbstractCegarLoop]: Abstraction has 8146 states and 27425 transitions. [2022-11-25 23:56:04,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 27425 transitions. [2022-11-25 23:56:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:56:04,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:04,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:04,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:04,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:04,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (42)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:56:05,001 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:56:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029214, now seen corresponding path program 1 times [2022-11-25 23:56:05,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:05,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182699884] [2022-11-25 23:56:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:05,002 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 [2022-11-25 23:56:05,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:05,003 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:56:05,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (45)] Waiting until timeout for monitored process [2022-11-25 23:56:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:56:05,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:05,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:05,485 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-25 23:56:05,485 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 [2022-11-25 23:56:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:05,595 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 20 [2022-11-25 23:56:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:05,637 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 20 [2022-11-25 23:56:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:05,668 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 20 [2022-11-25 23:56:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:05,715 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 20 [2022-11-25 23:56:05,781 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:56:05,781 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 [2022-11-25 23:56:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:05,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:05,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182699884] [2022-11-25 23:56:05,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182699884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:05,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:05,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:56:05,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002740011] [2022-11-25 23:56:05,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:05,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:56:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:56:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:56:05,833 INFO L87 Difference]: Start difference. First operand 8146 states and 27425 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:06,602 INFO L93 Difference]: Finished difference Result 7958 states and 26901 transitions. [2022-11-25 23:56:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:56:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:06,626 INFO L225 Difference]: With dead ends: 7958 [2022-11-25 23:56:06,626 INFO L226 Difference]: Without dead ends: 7958 [2022-11-25 23:56:06,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:56:06,626 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:06,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 3 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:56:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2022-11-25 23:56:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7958. [2022-11-25 23:56:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 6522 states have (on average 4.124655013799448) internal successors, (26901), 7957 states have internal predecessors, (26901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 26901 transitions. [2022-11-25 23:56:06,767 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 26901 transitions. Word has length 15 [2022-11-25 23:56:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:06,767 INFO L495 AbstractCegarLoop]: Abstraction has 7958 states and 26901 transitions. [2022-11-25 23:56:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 26901 transitions. [2022-11-25 23:56:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:56:06,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:06,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:06,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (45)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:56:06,970 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:56:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1083028527, now seen corresponding path program 1 times [2022-11-25 23:56:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368917062] [2022-11-25 23:56:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:06,971 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 [2022-11-25 23:56:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:06,972 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:56:06,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:56:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:56:07,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:07,579 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:56:07,580 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 [2022-11-25 23:56:07,628 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:07,628 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 [2022-11-25 23:56:07,726 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:56:07,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 23:56:07,941 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-25 23:56:07,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-25 23:56:08,164 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-25 23:56:08,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-25 23:56:08,281 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-25 23:56:08,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-25 23:56:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:08,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:08,412 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368917062] [2022-11-25 23:56:08,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368917062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:08,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:08,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:56:08,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542077783] [2022-11-25 23:56:08,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:08,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:56:08,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:56:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:56:08,413 INFO L87 Difference]: Start difference. First operand 7958 states and 26901 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:09,451 INFO L93 Difference]: Finished difference Result 6340 states and 21188 transitions. [2022-11-25 23:56:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:56:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:09,469 INFO L225 Difference]: With dead ends: 6340 [2022-11-25 23:56:09,469 INFO L226 Difference]: Without dead ends: 6340 [2022-11-25 23:56:09,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:56:09,470 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:09,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:56:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2022-11-25 23:56:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6340. [2022-11-25 23:56:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 5342 states have (on average 3.966304754773493) internal successors, (21188), 6339 states have internal predecessors, (21188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 21188 transitions. [2022-11-25 23:56:09,580 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 21188 transitions. Word has length 15 [2022-11-25 23:56:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:09,581 INFO L495 AbstractCegarLoop]: Abstraction has 6340 states and 21188 transitions. [2022-11-25 23:56:09,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 21188 transitions. [2022-11-25 23:56:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:56:09,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:09,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:09,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:09,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:56:09,791 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:56:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029215, now seen corresponding path program 1 times [2022-11-25 23:56:09,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:09,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225871238] [2022-11-25 23:56:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:09,792 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 [2022-11-25 23:56:09,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:09,793 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:56:09,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (47)] Waiting until timeout for monitored process [2022-11-25 23:56:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:56:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,464 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 23:56:10,464 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 15 treesize of output 32 [2022-11-25 23:56:10,487 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 [2022-11-25 23:56:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,576 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 [2022-11-25 23:56:10,610 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 [2022-11-25 23:56:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,627 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 [2022-11-25 23:56:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,725 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 [2022-11-25 23:56:10,768 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:10,768 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 [2022-11-25 23:56:10,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:10,924 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 [2022-11-25 23:56:10,973 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 23:56:10,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 23:56:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:11,222 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 [2022-11-25 23:56:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:56:11,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:11,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225871238] [2022-11-25 23:56:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225871238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:11,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:56:11,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:56:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184636360] [2022-11-25 23:56:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:11,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:56:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:56:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:56:11,542 INFO L87 Difference]: Start difference. First operand 6340 states and 21188 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:13,772 INFO L93 Difference]: Finished difference Result 6172 states and 20720 transitions. [2022-11-25 23:56:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:56:13,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:56:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:13,791 INFO L225 Difference]: With dead ends: 6172 [2022-11-25 23:56:13,791 INFO L226 Difference]: Without dead ends: 6172 [2022-11-25 23:56:13,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:56:13,792 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 207 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:13,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 23:56:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2022-11-25 23:56:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 6172. [2022-11-25 23:56:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6172 states, 5270 states have (on average 3.9316888045540797) internal successors, (20720), 6171 states have internal predecessors, (20720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6172 states to 6172 states and 20720 transitions. [2022-11-25 23:56:13,899 INFO L78 Accepts]: Start accepts. Automaton has 6172 states and 20720 transitions. Word has length 15 [2022-11-25 23:56:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:13,899 INFO L495 AbstractCegarLoop]: Abstraction has 6172 states and 20720 transitions. [2022-11-25 23:56:13,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6172 states and 20720 transitions. [2022-11-25 23:56:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:56:13,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:13,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:13,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (47)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:14,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 [2022-11-25 23:56:14,101 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-25 23:56:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1083028528, now seen corresponding path program 1 times [2022-11-25 23:56:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:14,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301399925] [2022-11-25 23:56:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:14,102 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 [2022-11-25 23:56:14,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:14,103 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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) [2022-11-25 23:56:14,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/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 (48)] Waiting until timeout for monitored process [2022-11-25 23:56:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:14,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 23:56:14,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:14,740 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:56:14,740 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 [2022-11-25 23:56:14,923 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:56:14,923 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 [2022-11-25 23:56:15,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:15,090 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 16 treesize of output 18 [2022-11-25 23:56:15,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:15,132 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 [2022-11-25 23:56:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:15,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-25 23:56:15,364 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:56:15,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 23:56:15,721 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-25 23:56:15,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-25 23:56:15,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 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 [2022-11-25 23:56:15,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:15,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-25 23:56:16,046 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-25 23:56:16,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-25 23:56:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:16,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-25 23:56:16,318 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-11-25 23:56:16,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-11-25 23:56:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:56:16,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:19,181 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_~id_0~0 (_ bv4 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_~get_2~0.offset .cse0))) (and (or (bvule (bvadd c_~get_2~0.offset .cse0) .cse1) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_205| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206| (_ BitVec 32)) (v_ArrVal_2013 (_ BitVec 1))) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206| v_ArrVal_2013) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_205|) (_ bv0 1))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206|) (_ bv0 1)))))) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206| (_ BitVec 32))) (or (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_205| (_ BitVec 32)) (v_ArrVal_2013 (_ BitVec 1)) (v_ArrVal_2012 (_ BitVec 32))) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206| v_ArrVal_2013) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_205|) (_ bv0 1))) (forall ((v_ArrVal_2014 (_ BitVec 32))) (bvule .cse1 (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206| v_ArrVal_2012) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_205| v_ArrVal_2014) c_~get_2~0.base))))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_206|) (_ bv0 1)))))))) is different from false [2022-11-25 23:56:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:56:37,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301399925] [2022-11-25 23:56:37,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301399925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [543312074] [2022-11-25 23:56:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:37,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:37,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:37,752 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:37,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-25 23:56:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 23:56:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:38,634 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:56:38,634 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 [2022-11-25 23:56:38,818 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:56:38,819 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 [2022-11-25 23:56:39,244 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:39,245 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 [2022-11-25 23:56:39,266 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 [2022-11-25 23:56:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:39,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-25 23:56:39,585 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:56:39,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-25 23:56:39,879 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-25 23:56:39,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-25 23:56:39,960 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 [2022-11-25 23:56:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:40,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-25 23:56:40,731 INFO L321 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2022-11-25 23:56:40,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 75 [2022-11-25 23:56:41,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:41,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 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 [2022-11-25 23:56:41,513 INFO L321 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2022-11-25 23:56:41,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 49 [2022-11-25 23:56:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:56:41,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:58:07,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [543312074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:07,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493221245] [2022-11-25 23:58:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:07,775 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:07,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d35dc9f-0e09-491d-9bf8-d76d5a9c991e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 23:58:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:58:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:08,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:58:08,253 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 [2022-11-25 23:58:08,442 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:58:08,443 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 [2022-11-25 23:58:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:08,672 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 [2022-11-25 23:58:08,705 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:08,706 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 [2022-11-25 23:58:08,969 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:08,969 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 [2022-11-25 23:58:08,980 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 [2022-11-25 23:58:09,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:09,057 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 [2022-11-25 23:58:09,103 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:09,104 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 [2022-11-25 23:58:09,197 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:09,198 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 [2022-11-25 23:58:09,216 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 [2022-11-25 23:58:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:09,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-25 23:58:09,554 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 23:58:09,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 23:58:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:58:09,661 INFO L328 TraceCheckSpWp]: Computing backward predicates...