./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9 --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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- 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-6b4ec56 [2022-11-20 21:00:19,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:00:19,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:00:19,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:00:19,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:00:19,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:00:19,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:00:19,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:00:19,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:00:19,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:00:19,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:00:19,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:00:19,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:00:19,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:00:19,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:00:19,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:00:19,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:00:19,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:00:19,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:00:19,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:00:19,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:00:19,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:00:19,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:00:19,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:00:19,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:00:19,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:00:19,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:00:19,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:00:19,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:00:19,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:00:19,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:00:19,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:00:19,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:00:19,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:00:19,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:00:19,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:00:19,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:00:19,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:00:19,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:00:19,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:00:19,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:00:19,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 21:00:19,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:00:19,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:00:19,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:00:19,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:00:19,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:00:19,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:00:19,654 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:00:19,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:00:19,655 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:00:19,655 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:00:19,656 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:00:19,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:00:19,656 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:00:19,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:00:19,657 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:00:19,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:00:19,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:00:19,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:00:19,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:00:19,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:00:19,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:00:19,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:00:19,661 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:00:19,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:00:19,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:00:19,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:00:19,662 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:00:19,662 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:00:19,663 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:00:19,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:00:19,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:00:19,664 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:00:19,664 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:00:19,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:00:19,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:00:19,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:00:19,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:00:19,666 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:00:19,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:00:19,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:00:19,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:00:19,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:00:19,667 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-11-20 21:00:19,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:00:20,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:00:20,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:00:20,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:00:20,022 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:00:20,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-20 21:00:23,282 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:00:23,524 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:00:23,525 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-20 21:00:23,539 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data/553dcfc04/1571bda115c54cd58bc76351da1c6396/FLAGa57e1a22c [2022-11-20 21:00:23,561 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data/553dcfc04/1571bda115c54cd58bc76351da1c6396 [2022-11-20 21:00:23,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:00:23,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:00:23,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:00:23,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:00:23,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:00:23,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:00:23" (1/1) ... [2022-11-20 21:00:23,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f2be51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:23, skipping insertion in model container [2022-11-20 21:00:23,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:00:23" (1/1) ... [2022-11-20 21:00:23,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:00:23,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:00:23,888 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-20 21:00:23,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:00:23,913 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) [2022-11-20 21:00:23,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@224c5b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:23, skipping insertion in model container [2022-11-20 21:00:23,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:00:23,915 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 21:00:23,917 INFO L158 Benchmark]: Toolchain (without parser) took 346.38ms. Allocated memory was 130.0MB in the beginning and 178.3MB in the end (delta: 48.2MB). Free memory was 71.1MB in the beginning and 148.0MB in the end (delta: -77.0MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2022-11-20 21:00:23,918 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory is still 103.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:00:23,919 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.31ms. Allocated memory was 130.0MB in the beginning and 178.3MB in the end (delta: 48.2MB). Free memory was 70.9MB in the beginning and 148.1MB in the end (delta: -77.2MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2022-11-20 21:00:23,920 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory is still 103.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 340.31ms. Allocated memory was 130.0MB in the beginning and 178.3MB in the end (delta: 48.2MB). Free memory was 70.9MB in the beginning and 148.1MB in the end (delta: -77.2MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9 --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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- 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-6b4ec56 [2022-11-20 21:00:26,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:00:26,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:00:26,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:00:26,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:00:26,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:00:26,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:00:26,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:00:26,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:00:26,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:00:26,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:00:26,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:00:26,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:00:26,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:00:26,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:00:26,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:00:26,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:00:26,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:00:26,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:00:26,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:00:26,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:00:26,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:00:26,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:00:26,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:00:26,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:00:26,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:00:26,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:00:26,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:00:26,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:00:26,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:00:26,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:00:26,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:00:26,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:00:26,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:00:26,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:00:26,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:00:26,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:00:26,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:00:26,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:00:26,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:00:26,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:00:26,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 21:00:26,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:00:26,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:00:26,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:00:26,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:00:26,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:00:26,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:00:26,597 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:00:26,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:00:26,598 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:00:26,598 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:00:26,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:00:26,599 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:00:26,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:00:26,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:00:26,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:00:26,601 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:00:26,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:00:26,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:00:26,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:00:26,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:00:26,603 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:00:26,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:00:26,604 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:00:26,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:00:26,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:00:26,605 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 21:00:26,605 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 21:00:26,605 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:00:26,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:00:26,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:00:26,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 21:00:26,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:00:26,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:00:26,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:00:26,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:00:26,608 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 21:00:26,608 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 21:00:26,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:00:26,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 21:00:26,609 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-11-20 21:00:27,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:00:27,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:00:27,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:00:27,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:00:27,081 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:00:27,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-20 21:00:30,248 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:00:30,512 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:00:30,512 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-11-20 21:00:30,526 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data/75b3f72cf/3bd631547390437b8a2812a3f7fa9329/FLAG0909a60f2 [2022-11-20 21:00:30,545 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/data/75b3f72cf/3bd631547390437b8a2812a3f7fa9329 [2022-11-20 21:00:30,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:00:30,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:00:30,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:00:30,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:00:30,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:00:30,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:30,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70812bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30, skipping insertion in model container [2022-11-20 21:00:30,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:30,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:00:30,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:00:30,800 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-20 21:00:30,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:00:30,829 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 21:00:30,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:00:30,879 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-20 21:00:30,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:00:30,913 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:00:30,950 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_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-11-20 21:00:30,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:00:30,994 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:00:30,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30 WrapperNode [2022-11-20 21:00:30,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:00:30,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:00:30,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:00:30,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:00:31,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,081 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 167 [2022-11-20 21:00:31,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:00:31,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:00:31,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:00:31,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:00:31,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,153 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:00:31,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:00:31,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:00:31,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:00:31,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (1/1) ... [2022-11-20 21:00:31,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:00:31,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:00:31,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:00:31,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:00:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:00:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 21:00:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:00:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 21:00:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 21:00:31,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 21:00:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 21:00:31,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 21:00:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 21:00:31,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 21:00:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:00:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:00:31,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:00:31,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:00:31,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 21:00:31,271 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 21:00:31,503 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:00:31,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:00:32,419 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:00:32,432 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:00:32,432 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 21:00:32,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:00:32 BoogieIcfgContainer [2022-11-20 21:00:32,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:00:32,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:00:32,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:00:32,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:00:32,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:00:30" (1/3) ... [2022-11-20 21:00:32,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad39a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:00:32, skipping insertion in model container [2022-11-20 21:00:32,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:00:30" (2/3) ... [2022-11-20 21:00:32,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad39a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:00:32, skipping insertion in model container [2022-11-20 21:00:32,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:00:32" (3/3) ... [2022-11-20 21:00:32,447 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2022-11-20 21:00:32,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:00:32,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-20 21:00:32,473 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 21:00:32,710 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 21:00:32,778 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 21:00:32,802 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 328 places, 347 transitions, 718 flow [2022-11-20 21:00:32,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 328 places, 347 transitions, 718 flow [2022-11-20 21:00:32,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 347 transitions, 718 flow [2022-11-20 21:00:32,976 INFO L130 PetriNetUnfolder]: 29/344 cut-off events. [2022-11-20 21:00:32,976 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 21:00:32,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 344 events. 29/344 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 621 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2022-11-20 21:00:32,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2022-11-20 21:01:27,729 INFO L134 LiptonReduction]: Checked pairs total: 24989 [2022-11-20 21:01:27,729 INFO L136 LiptonReduction]: Total number of compositions: 387 [2022-11-20 21:01:27,737 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 86 transitions, 196 flow [2022-11-20 21:01:28,217 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:28,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:01:28,243 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;@14dda1b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:01:28,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-20 21:01:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:01:28,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:28,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:01:28,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 42934, now seen corresponding path program 1 times [2022-11-20 21:01:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:28,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30338957] [2022-11-20 21:01:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:28,369 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 [2022-11-20 21:01:28,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:28,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:28,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:28,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:01:28,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:28,856 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:28,857 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 [2022-11-20 21:01:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:28,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:01:28,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30338957] [2022-11-20 21:01:28,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30338957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:28,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:28,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:01:28,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120838489] [2022-11-20 21:01:28,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:01:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:01:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:28,974 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 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) [2022-11-20 21:01:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:30,621 INFO L93 Difference]: Finished difference Result 13522 states and 53984 transitions. [2022-11-20 21:01:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:30,624 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 [2022-11-20 21:01:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:30,863 INFO L225 Difference]: With dead ends: 13522 [2022-11-20 21:01:30,864 INFO L226 Difference]: Without dead ends: 13522 [2022-11-20 21:01:30,865 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 [2022-11-20 21:01:30,870 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:30,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 21:01:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2022-11-20 21:01:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 6766. [2022-11-20 21:01:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 5263 states have (on average 5.131103933117994) internal successors, (27005), 6765 states have internal predecessors, (27005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 27005 transitions. [2022-11-20 21:01:31,791 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 27005 transitions. Word has length 2 [2022-11-20 21:01:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:31,793 INFO L495 AbstractCegarLoop]: Abstraction has 6766 states and 27005 transitions. [2022-11-20 21:01:31,794 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) [2022-11-20 21:01:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 27005 transitions. [2022-11-20 21:01:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:01:31,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:31,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:01:31,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:32,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:32,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash 42935, now seen corresponding path program 1 times [2022-11-20 21:01:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:32,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48739935] [2022-11-20 21:01:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:01:32,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:32,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:01:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:32,323 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:01:32,323 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 [2022-11-20 21:01:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:32,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:01:32,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48739935] [2022-11-20 21:01:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48739935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:32,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:01:32,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955528005] [2022-11-20 21:01:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:32,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:01:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:01:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:32,356 INFO L87 Difference]: Start difference. First operand 6766 states and 27005 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) [2022-11-20 21:01:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:33,104 INFO L93 Difference]: Finished difference Result 6763 states and 26999 transitions. [2022-11-20 21:01:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:33,105 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 [2022-11-20 21:01:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:33,152 INFO L225 Difference]: With dead ends: 6763 [2022-11-20 21:01:33,152 INFO L226 Difference]: Without dead ends: 6763 [2022-11-20 21:01:33,153 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 [2022-11-20 21:01:33,157 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:33,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:01:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-11-20 21:01:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-11-20 21:01:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 5.129963898916968) internal successors, (26999), 6762 states have internal predecessors, (26999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 26999 transitions. [2022-11-20 21:01:33,602 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 26999 transitions. Word has length 2 [2022-11-20 21:01:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:33,603 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 26999 transitions. [2022-11-20 21:01:33,603 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) [2022-11-20 21:01:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 26999 transitions. [2022-11-20 21:01:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:01:33,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:33,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:01:33,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:33,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:33,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1338455, now seen corresponding path program 1 times [2022-11-20 21:01:33,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:33,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109037998] [2022-11-20 21:01:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:33,821 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 [2022-11-20 21:01:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:33,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:33,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:01:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:34,178 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:34,179 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 [2022-11-20 21:01:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:34,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:34,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109037998] [2022-11-20 21:01:34,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109037998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1654924665] [2022-11-20 21:01:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:34,553 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:01:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:01:34,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:01:34,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 21:01:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:01:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:34,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:34,885 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 [2022-11-20 21:01:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:35,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:35,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1654924665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:35,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718803909] [2022-11-20 21:01:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:35,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:01:35,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:35,090 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:01:35,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:01:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:01:35,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:35,350 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:35,351 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 [2022-11-20 21:01:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:35,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:35,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718803909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:35,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:01:35,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-20 21:01:35,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607282871] [2022-11-20 21:01:35,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:01:35,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:01:35,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:01:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:01:35,618 INFO L87 Difference]: Start difference. First operand 6763 states and 26999 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) [2022-11-20 21:01:37,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:01:38,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:01:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:41,980 INFO L93 Difference]: Finished difference Result 27031 states and 107960 transitions. [2022-11-20 21:01:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:01:41,982 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 [2022-11-20 21:01:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:42,232 INFO L225 Difference]: With dead ends: 27031 [2022-11-20 21:01:42,233 INFO L226 Difference]: Without dead ends: 27031 [2022-11-20 21:01:42,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:01:42,237 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 517 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:42,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 0 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-20 21:01:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-11-20 21:01:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-11-20 21:01:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 5.125758725341426) internal successors, (27023), 6771 states have internal predecessors, (27023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 27023 transitions. [2022-11-20 21:01:42,898 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 27023 transitions. Word has length 3 [2022-11-20 21:01:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:42,899 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 27023 transitions. [2022-11-20 21:01:42,900 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) [2022-11-20 21:01:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 27023 transitions. [2022-11-20 21:01:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:01:42,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:42,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:01:42,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:01:43,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:01:43,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:43,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:43,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash 41581335, now seen corresponding path program 1 times [2022-11-20 21:01:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737578089] [2022-11-20 21:01:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:43,513 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 [2022-11-20 21:01:43,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:43,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:43,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:01:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:43,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:43,818 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 21:01:43,818 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 [2022-11-20 21:01:43,851 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 21:01:43,851 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 [2022-11-20 21:01:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:43,913 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 [2022-11-20 21:01:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:43,949 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 [2022-11-20 21:01:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:43,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:01:43,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737578089] [2022-11-20 21:01:43,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737578089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:43,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:43,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:01:43,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78074631] [2022-11-20 21:01:43,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:43,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:01:43,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:01:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:43,986 INFO L87 Difference]: Start difference. First operand 6772 states and 27023 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:44,682 INFO L93 Difference]: Finished difference Result 5399 states and 20942 transitions. [2022-11-20 21:01:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-20 21:01:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:44,728 INFO L225 Difference]: With dead ends: 5399 [2022-11-20 21:01:44,729 INFO L226 Difference]: Without dead ends: 5399 [2022-11-20 21:01:44,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:44,731 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:44,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 2 Unchecked, 0.6s Time] [2022-11-20 21:01:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-11-20 21:01:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2022-11-20 21:01:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 4305 states have (on average 4.864576074332172) internal successors, (20942), 5398 states have internal predecessors, (20942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 20942 transitions. [2022-11-20 21:01:44,972 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 20942 transitions. Word has length 4 [2022-11-20 21:01:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:44,973 INFO L495 AbstractCegarLoop]: Abstraction has 5399 states and 20942 transitions. [2022-11-20 21:01:44,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 20942 transitions. [2022-11-20 21:01:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:01:44,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:44,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:01:44,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Forceful destruction successful, exit code 0 [2022-11-20 21:01:45,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:45,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 41581336, now seen corresponding path program 1 times [2022-11-20 21:01:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141184337] [2022-11-20 21:01:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:45,189 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 [2022-11-20 21:01:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:45,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:45,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:01:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:45,456 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 21:01:45,456 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 [2022-11-20 21:01:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:45,550 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 [2022-11-20 21:01:45,608 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:01:45,608 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 [2022-11-20 21:01:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:45,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:01:45,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:45,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141184337] [2022-11-20 21:01:45,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141184337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:45,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:45,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:01:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893169005] [2022-11-20 21:01:45,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:45,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:01:45,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:01:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:45,628 INFO L87 Difference]: Start difference. First operand 5399 states and 20942 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:46,116 INFO L93 Difference]: Finished difference Result 4026 states and 14861 transitions. [2022-11-20 21:01:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-20 21:01:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:46,140 INFO L225 Difference]: With dead ends: 4026 [2022-11-20 21:01:46,141 INFO L226 Difference]: Without dead ends: 4026 [2022-11-20 21:01:46,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:46,142 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:46,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 1 Unchecked, 0.5s Time] [2022-11-20 21:01:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-20 21:01:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4026. [2022-11-20 21:01:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.452067106051528) internal successors, (14861), 4025 states have internal predecessors, (14861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14861 transitions. [2022-11-20 21:01:46,309 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14861 transitions. Word has length 4 [2022-11-20 21:01:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:46,309 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 14861 transitions. [2022-11-20 21:01:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14861 transitions. [2022-11-20 21:01:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:01:46,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:46,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:01:46,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:01:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:46,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1304989203, now seen corresponding path program 1 times [2022-11-20 21:01:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416327153] [2022-11-20 21:01:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:46,529 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 [2022-11-20 21:01:46,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:46,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:46,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:01:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:46,777 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 21:01:46,778 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 [2022-11-20 21:01:46,796 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 [2022-11-20 21:01:46,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:46,866 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 [2022-11-20 21:01:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:46,900 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 [2022-11-20 21:01:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:46,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:01:46,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416327153] [2022-11-20 21:01:46,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416327153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:46,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:46,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:01:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425604208] [2022-11-20 21:01:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:46,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:01:46,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:01:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:46,972 INFO L87 Difference]: Start difference. First operand 4026 states and 14861 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-20 21:01:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:47,476 INFO L93 Difference]: Finished difference Result 3914 states and 14509 transitions. [2022-11-20 21:01:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:47,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-20 21:01:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:47,498 INFO L225 Difference]: With dead ends: 3914 [2022-11-20 21:01:47,498 INFO L226 Difference]: Without dead ends: 3914 [2022-11-20 21:01:47,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:47,500 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:47,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2022-11-20 21:01:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-20 21:01:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3914. [2022-11-20 21:01:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3280 states have (on average 4.423475609756098) internal successors, (14509), 3913 states have internal predecessors, (14509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 14509 transitions. [2022-11-20 21:01:47,659 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 14509 transitions. Word has length 6 [2022-11-20 21:01:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:47,661 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 14509 transitions. [2022-11-20 21:01:47,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-20 21:01:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 14509 transitions. [2022-11-20 21:01:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:01:47,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:47,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:01:47,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:47,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:47,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1304989204, now seen corresponding path program 1 times [2022-11-20 21:01:47,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:47,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968853470] [2022-11-20 21:01:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:47,878 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 [2022-11-20 21:01:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:47,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:47,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 21:01:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:48,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:01:48,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:48,142 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:01:48,143 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 [2022-11-20 21:01:48,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:01:48,425 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 21:01:48,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 21:01:48,645 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:01:48,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:01:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:48,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:01:48,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:48,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968853470] [2022-11-20 21:01:48,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968853470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:48,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:48,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:01:48,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501653351] [2022-11-20 21:01:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:48,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:01:48,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:48,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:01:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:48,799 INFO L87 Difference]: Start difference. First operand 3914 states and 14509 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-20 21:01:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:49,169 INFO L93 Difference]: Finished difference Result 3918 states and 14517 transitions. [2022-11-20 21:01:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:01:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-20 21:01:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:49,192 INFO L225 Difference]: With dead ends: 3918 [2022-11-20 21:01:49,192 INFO L226 Difference]: Without dead ends: 3918 [2022-11-20 21:01:49,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:49,194 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:49,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-20 21:01:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-11-20 21:01:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2022-11-20 21:01:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3284 states have (on average 4.420523751522533) internal successors, (14517), 3917 states have internal predecessors, (14517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 14517 transitions. [2022-11-20 21:01:49,355 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 14517 transitions. Word has length 6 [2022-11-20 21:01:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:49,356 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 14517 transitions. [2022-11-20 21:01:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-20 21:01:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 14517 transitions. [2022-11-20 21:01:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:01:49,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:49,357 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 21:01:49,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:01:49,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:49,569 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:01:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1226655734, now seen corresponding path program 2 times [2022-11-20 21:01:49,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:01:49,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205847980] [2022-11-20 21:01:49,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:01:49,570 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 [2022-11-20 21:01:49,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:01:49,571 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:01:49,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:01:49,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:01:49,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:01:49,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:01:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:49,838 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:49,838 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 [2022-11-20 21:01:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:50,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:01:50,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205847980] [2022-11-20 21:01:50,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205847980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1658233510] [2022-11-20 21:01:50,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:01:50,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:01:50,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:01:50,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:01:50,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 21:01:50,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:01:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:01:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:01:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:51,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:51,141 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 [2022-11-20 21:01:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:51,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1658233510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461815079] [2022-11-20 21:01:52,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:01:52,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:01:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:52,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:01:52,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:01:52,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:01:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:01:52,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:01:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:01:52,466 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:01:52,466 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 [2022-11-20 21:01:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:52,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:01:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:52,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461815079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:01:52,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:01:52,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-20 21:01:52,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660311891] [2022-11-20 21:01:52,769 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:01:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:01:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:01:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:01:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:01:52,770 INFO L87 Difference]: Start difference. First operand 3918 states and 14517 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:01:56,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:01:58,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:00,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:02,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:04,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:05,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:07,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:11,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:12,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:14,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:16,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:18,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:20,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:22,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:25,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:27,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:28,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:30,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:32,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:35,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:37,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:38,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:41,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:02:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:52,524 INFO L93 Difference]: Finished difference Result 38991 states and 144825 transitions. [2022-11-20 21:02:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:02:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:02:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:52,704 INFO L225 Difference]: With dead ends: 38991 [2022-11-20 21:02:52,704 INFO L226 Difference]: Without dead ends: 38991 [2022-11-20 21:02:52,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:02:52,705 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3544 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 253 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3544 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:52,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3544 Valid, 0 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2387 Invalid, 11 Unknown, 0 Unchecked, 56.3s Time] [2022-11-20 21:02:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38991 states. [2022-11-20 21:02:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38991 to 3932. [2022-11-20 21:02:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3298 states have (on average 4.410855063674955) internal successors, (14547), 3931 states have internal predecessors, (14547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 14547 transitions. [2022-11-20 21:02:53,257 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 14547 transitions. Word has length 6 [2022-11-20 21:02:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:53,257 INFO L495 AbstractCegarLoop]: Abstraction has 3932 states and 14547 transitions. [2022-11-20 21:02:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 14547 transitions. [2022-11-20 21:02:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:02:53,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:53,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:53,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:53,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:53,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:53,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:02:53,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:02:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1799959352, now seen corresponding path program 1 times [2022-11-20 21:02:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093335661] [2022-11-20 21:02:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:53,873 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 [2022-11-20 21:02:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:53,874 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:02:53,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 21:02:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:02:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:54,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:54,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:54,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093335661] [2022-11-20 21:02:54,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093335661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:54,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:54,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:02:54,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231086872] [2022-11-20 21:02:54,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:54,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:02:54,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:54,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:02:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:02:54,051 INFO L87 Difference]: Start difference. First operand 3932 states and 14547 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) [2022-11-20 21:02:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:55,171 INFO L93 Difference]: Finished difference Result 5620 states and 20083 transitions. [2022-11-20 21:02:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:02:55,172 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 [2022-11-20 21:02:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:55,187 INFO L225 Difference]: With dead ends: 5620 [2022-11-20 21:02:55,187 INFO L226 Difference]: Without dead ends: 5620 [2022-11-20 21:02:55,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:02:55,189 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:55,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 3 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 21:02:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5620 states. [2022-11-20 21:02:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5620 to 4460. [2022-11-20 21:02:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 3826 states have (on average 4.361996863565081) internal successors, (16689), 4459 states have internal predecessors, (16689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 16689 transitions. [2022-11-20 21:02:55,338 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 16689 transitions. Word has length 7 [2022-11-20 21:02:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:55,339 INFO L495 AbstractCegarLoop]: Abstraction has 4460 states and 16689 transitions. [2022-11-20 21:02:55,339 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) [2022-11-20 21:02:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 16689 transitions. [2022-11-20 21:02:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:02:55,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:55,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:55,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Forceful destruction successful, exit code 0 [2022-11-20 21:02:55,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:55,552 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:02:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1799959601, now seen corresponding path program 1 times [2022-11-20 21:02:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:55,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938357397] [2022-11-20 21:02:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:55,554 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 [2022-11-20 21:02:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:55,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:02:55,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:02:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:02:55,795 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:02:55,795 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 [2022-11-20 21:02:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:02:56,071 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 21:02:56,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 21:02:56,279 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:02:56,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:02:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:56,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:56,447 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938357397] [2022-11-20 21:02:56,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938357397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:56,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:56,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:02:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310963591] [2022-11-20 21:02:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:56,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:02:56,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:02:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:56,449 INFO L87 Difference]: Start difference. First operand 4460 states and 16689 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:56,813 INFO L93 Difference]: Finished difference Result 4461 states and 16691 transitions. [2022-11-20 21:02:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:02:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:02:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:56,833 INFO L225 Difference]: With dead ends: 4461 [2022-11-20 21:02:56,833 INFO L226 Difference]: Without dead ends: 4461 [2022-11-20 21:02:56,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:56,834 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:56,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-20 21:02:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2022-11-20 21:02:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 4461. [2022-11-20 21:02:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4461 states, 3827 states have (on average 4.361379670760387) internal successors, (16691), 4460 states have internal predecessors, (16691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 16691 transitions. [2022-11-20 21:02:56,942 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 16691 transitions. Word has length 7 [2022-11-20 21:02:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:56,942 INFO L495 AbstractCegarLoop]: Abstraction has 4461 states and 16691 transitions. [2022-11-20 21:02:56,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 16691 transitions. [2022-11-20 21:02:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:02:56,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:56,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:56,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:57,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:57,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:02:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1799960748, now seen corresponding path program 1 times [2022-11-20 21:02:57,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:57,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350705356] [2022-11-20 21:02:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:57,156 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 [2022-11-20 21:02:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:57,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:02:57,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:02:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:02:57,372 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:02:57,372 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 [2022-11-20 21:02:57,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:02:57,614 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 21:02:57,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 21:02:57,788 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:02:57,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:02:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:58,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:58,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350705356] [2022-11-20 21:02:58,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350705356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:58,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:58,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:02:58,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847683969] [2022-11-20 21:02:58,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:58,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:02:58,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:02:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:58,128 INFO L87 Difference]: Start difference. First operand 4461 states and 16691 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:02:58,540 INFO L93 Difference]: Finished difference Result 4462 states and 16692 transitions. [2022-11-20 21:02:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:02:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:02:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:02:58,553 INFO L225 Difference]: With dead ends: 4462 [2022-11-20 21:02:58,553 INFO L226 Difference]: Without dead ends: 4462 [2022-11-20 21:02:58,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:58,554 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:02:58,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-20 21:02:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2022-11-20 21:02:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4462. [2022-11-20 21:02:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 3828 states have (on average 4.360501567398119) internal successors, (16692), 4461 states have internal predecessors, (16692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 16692 transitions. [2022-11-20 21:02:58,661 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 16692 transitions. Word has length 7 [2022-11-20 21:02:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:02:58,662 INFO L495 AbstractCegarLoop]: Abstraction has 4462 states and 16692 transitions. [2022-11-20 21:02:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:02:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 16692 transitions. [2022-11-20 21:02:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:02:58,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:02:58,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:02:58,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:58,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:58,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:02:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:02:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1798953620, now seen corresponding path program 1 times [2022-11-20 21:02:58,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:02:58,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682509796] [2022-11-20 21:02:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:02:58,876 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 [2022-11-20 21:02:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:02:58,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:02:58,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:02:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:02:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:02:59,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:02:59,117 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:02:59,118 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 [2022-11-20 21:02:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:02:59,350 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 21:02:59,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 21:02:59,558 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:02:59,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:02:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:02:59,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:02:59,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:02:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682509796] [2022-11-20 21:02:59,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682509796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:59,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:02:59,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:02:59,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293104786] [2022-11-20 21:02:59,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:59,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:02:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:02:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:02:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:02:59,941 INFO L87 Difference]: Start difference. First operand 4462 states and 16692 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:00,294 INFO L93 Difference]: Finished difference Result 4474 states and 16719 transitions. [2022-11-20 21:03:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:03:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:03:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:00,317 INFO L225 Difference]: With dead ends: 4474 [2022-11-20 21:03:00,317 INFO L226 Difference]: Without dead ends: 4474 [2022-11-20 21:03:00,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:00,319 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:00,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-11-20 21:03:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2022-11-20 21:03:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 4474. [2022-11-20 21:03:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 3840 states have (on average 4.35390625) internal successors, (16719), 4473 states have internal predecessors, (16719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 16719 transitions. [2022-11-20 21:03:00,430 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 16719 transitions. Word has length 7 [2022-11-20 21:03:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:00,431 INFO L495 AbstractCegarLoop]: Abstraction has 4474 states and 16719 transitions. [2022-11-20 21:03:00,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 16719 transitions. [2022-11-20 21:03:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:03:00,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:00,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:00,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:00,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1718130637, now seen corresponding path program 1 times [2022-11-20 21:03:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933406297] [2022-11-20 21:03:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:00,633 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 [2022-11-20 21:03:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:00,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:00,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 21:03:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:00,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:03:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:00,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:00,887 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:03:00,887 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 [2022-11-20 21:03:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:01,163 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 21:03:01,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 21:03:01,378 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:03:01,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:03:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:01,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:01,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933406297] [2022-11-20 21:03:01,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933406297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:01,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:01,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234798396] [2022-11-20 21:03:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:01,504 INFO L87 Difference]: Start difference. First operand 4474 states and 16719 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:01,817 INFO L93 Difference]: Finished difference Result 4476 states and 16723 transitions. [2022-11-20 21:03:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:03:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:03:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:01,831 INFO L225 Difference]: With dead ends: 4476 [2022-11-20 21:03:01,831 INFO L226 Difference]: Without dead ends: 4476 [2022-11-20 21:03:01,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:01,832 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:01,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-11-20 21:03:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2022-11-20 21:03:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2022-11-20 21:03:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 3840 states have (on average 4.35390625) internal successors, (16719), 4473 states have internal predecessors, (16719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 16719 transitions. [2022-11-20 21:03:01,918 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 16719 transitions. Word has length 7 [2022-11-20 21:03:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:01,919 INFO L495 AbstractCegarLoop]: Abstraction has 4474 states and 16719 transitions. [2022-11-20 21:03:01,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 16719 transitions. [2022-11-20 21:03:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:03:01,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:01,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:01,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:02,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:02,122 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash -550036939, now seen corresponding path program 1 times [2022-11-20 21:03:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108690985] [2022-11-20 21:03:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:02,123 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 [2022-11-20 21:03:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:02,124 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:02,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Waiting until timeout for monitored process [2022-11-20 21:03:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:02,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:03:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:02,380 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:03:02,381 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 [2022-11-20 21:03:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:02,642 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 21:03:02,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 21:03:02,856 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:03:02,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:03:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:02,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:02,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108690985] [2022-11-20 21:03:02,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108690985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:02,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:02,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630178293] [2022-11-20 21:03:02,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:02,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:02,990 INFO L87 Difference]: Start difference. First operand 4474 states and 16719 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:03,321 INFO L93 Difference]: Finished difference Result 4477 states and 16725 transitions. [2022-11-20 21:03:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:03:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:03:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:03,335 INFO L225 Difference]: With dead ends: 4477 [2022-11-20 21:03:03,335 INFO L226 Difference]: Without dead ends: 4477 [2022-11-20 21:03:03,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:03,336 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:03,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-20 21:03:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2022-11-20 21:03:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 4477. [2022-11-20 21:03:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 3843 states have (on average 4.352068696330991) internal successors, (16725), 4476 states have internal predecessors, (16725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 16725 transitions. [2022-11-20 21:03:03,435 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 16725 transitions. Word has length 7 [2022-11-20 21:03:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:03,435 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 16725 transitions. [2022-11-20 21:03:03,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 16725 transitions. [2022-11-20 21:03:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:03:03,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:03,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:03,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:03,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:03,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:03,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash -35823618, now seen corresponding path program 1 times [2022-11-20 21:03:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:03,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631427888] [2022-11-20 21:03:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:03,650 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 [2022-11-20 21:03:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:03,651 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:03,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:03,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:03:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:03,874 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 21:03:03,874 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 [2022-11-20 21:03:03,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:03,968 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 [2022-11-20 21:03:04,009 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:03:04,010 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 [2022-11-20 21:03:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:04,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:04,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:04,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631427888] [2022-11-20 21:03:04,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631427888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:04,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:04,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722962311] [2022-11-20 21:03:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:04,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:04,080 INFO L87 Difference]: Start difference. First operand 4477 states and 16725 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:04,493 INFO L93 Difference]: Finished difference Result 4363 states and 16368 transitions. [2022-11-20 21:03:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:04,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:03:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:04,507 INFO L225 Difference]: With dead ends: 4363 [2022-11-20 21:03:04,507 INFO L226 Difference]: Without dead ends: 4363 [2022-11-20 21:03:04,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:04,509 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:04,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-20 21:03:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2022-11-20 21:03:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 4343. [2022-11-20 21:03:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 3763 states have (on average 4.338559659845868) internal successors, (16326), 4342 states have internal predecessors, (16326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 16326 transitions. [2022-11-20 21:03:04,590 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 16326 transitions. Word has length 8 [2022-11-20 21:03:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:04,591 INFO L495 AbstractCegarLoop]: Abstraction has 4343 states and 16326 transitions. [2022-11-20 21:03:04,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 16326 transitions. [2022-11-20 21:03:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:03:04,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:04,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:04,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:04,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:04,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:04,799 INFO L85 PathProgramCache]: Analyzing trace with hash -35797331, now seen corresponding path program 1 times [2022-11-20 21:03:04,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:04,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528281640] [2022-11-20 21:03:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:04,799 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 [2022-11-20 21:03:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:04,801 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:04,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 21:03:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:04,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:03:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:05,091 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 21:03:05,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-20 21:03:05,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:05,116 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 98 treesize of output 94 [2022-11-20 21:03:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:05,178 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 [2022-11-20 21:03:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:05,205 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 [2022-11-20 21:03:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:05,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:05,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:05,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528281640] [2022-11-20 21:03:05,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528281640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:05,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:05,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:05,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010401677] [2022-11-20 21:03:05,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:05,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:05,299 INFO L87 Difference]: Start difference. First operand 4343 states and 16326 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:05,750 INFO L93 Difference]: Finished difference Result 4112 states and 15565 transitions. [2022-11-20 21:03:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:03:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:05,763 INFO L225 Difference]: With dead ends: 4112 [2022-11-20 21:03:05,763 INFO L226 Difference]: Without dead ends: 4112 [2022-11-20 21:03:05,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:05,764 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:05,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-20 21:03:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2022-11-20 21:03:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 4112. [2022-11-20 21:03:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 3618 states have (on average 4.302100608070758) internal successors, (15565), 4111 states have internal predecessors, (15565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 15565 transitions. [2022-11-20 21:03:05,843 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 15565 transitions. Word has length 8 [2022-11-20 21:03:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:05,844 INFO L495 AbstractCegarLoop]: Abstraction has 4112 states and 15565 transitions. [2022-11-20 21:03:05,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 15565 transitions. [2022-11-20 21:03:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:03:05,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:05,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:05,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:06,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:06,059 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:06,059 INFO L85 PathProgramCache]: Analyzing trace with hash -35797330, now seen corresponding path program 1 times [2022-11-20 21:03:06,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:06,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480443822] [2022-11-20 21:03:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:06,059 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 [2022-11-20 21:03:06,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:06,060 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 21:03:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:06,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:03:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:06,323 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:03:06,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:03:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:06,366 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 [2022-11-20 21:03:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:06,399 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 [2022-11-20 21:03:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:06,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:06,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:06,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480443822] [2022-11-20 21:03:06,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480443822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:06,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:06,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:06,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221625873] [2022-11-20 21:03:06,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:06,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:06,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:06,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:06,492 INFO L87 Difference]: Start difference. First operand 4112 states and 15565 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:06,918 INFO L93 Difference]: Finished difference Result 4120 states and 15589 transitions. [2022-11-20 21:03:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:03:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:06,931 INFO L225 Difference]: With dead ends: 4120 [2022-11-20 21:03:06,931 INFO L226 Difference]: Without dead ends: 4120 [2022-11-20 21:03:06,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:03:06,932 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:06,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-20 21:03:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2022-11-20 21:03:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 4120. [2022-11-20 21:03:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 3626 states have (on average 4.2992277992278) internal successors, (15589), 4119 states have internal predecessors, (15589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 15589 transitions. [2022-11-20 21:03:07,013 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 15589 transitions. Word has length 8 [2022-11-20 21:03:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:07,013 INFO L495 AbstractCegarLoop]: Abstraction has 4120 states and 15589 transitions. [2022-11-20 21:03:07,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 15589 transitions. [2022-11-20 21:03:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:03:07,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:07,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:07,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:07,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 128723767, now seen corresponding path program 1 times [2022-11-20 21:03:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629870103] [2022-11-20 21:03:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:07,216 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 [2022-11-20 21:03:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:07,217 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:07,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:03:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:07,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:07,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:07,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629870103] [2022-11-20 21:03:07,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629870103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:07,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:07,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:03:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690436826] [2022-11-20 21:03:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:07,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:07,416 INFO L87 Difference]: Start difference. First operand 4120 states and 15589 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:08,602 INFO L93 Difference]: Finished difference Result 6031 states and 22315 transitions. [2022-11-20 21:03:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:03:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:08,623 INFO L225 Difference]: With dead ends: 6031 [2022-11-20 21:03:08,623 INFO L226 Difference]: Without dead ends: 6031 [2022-11-20 21:03:08,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:08,623 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 79 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:08,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 3 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 21:03:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2022-11-20 21:03:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 4120. [2022-11-20 21:03:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 3626 states have (on average 4.2992277992278) internal successors, (15589), 4119 states have internal predecessors, (15589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 15589 transitions. [2022-11-20 21:03:08,737 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 15589 transitions. Word has length 8 [2022-11-20 21:03:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:08,737 INFO L495 AbstractCegarLoop]: Abstraction has 4120 states and 15589 transitions. [2022-11-20 21:03:08,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 15589 transitions. [2022-11-20 21:03:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:08,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:08,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:08,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:08,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:08,940 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1110615669, now seen corresponding path program 1 times [2022-11-20 21:03:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:08,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969259241] [2022-11-20 21:03:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:08,941 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 [2022-11-20 21:03:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:08,942 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:08,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:09,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:03:09,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:09,163 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:03:09,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:03:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:09,211 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 [2022-11-20 21:03:09,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:09,251 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 [2022-11-20 21:03:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:09,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:09,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969259241] [2022-11-20 21:03:09,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969259241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:09,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:09,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907745962] [2022-11-20 21:03:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:09,364 INFO L87 Difference]: Start difference. First operand 4120 states and 15589 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:09,737 INFO L93 Difference]: Finished difference Result 4126 states and 15620 transitions. [2022-11-20 21:03:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:09,749 INFO L225 Difference]: With dead ends: 4126 [2022-11-20 21:03:09,749 INFO L226 Difference]: Without dead ends: 4126 [2022-11-20 21:03:09,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:03:09,750 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:09,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-11-20 21:03:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2022-11-20 21:03:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 4126. [2022-11-20 21:03:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4126 states, 3632 states have (on average 4.3006607929515415) internal successors, (15620), 4125 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4126 states to 4126 states and 15620 transitions. [2022-11-20 21:03:09,847 INFO L78 Accepts]: Start accepts. Automaton has 4126 states and 15620 transitions. Word has length 9 [2022-11-20 21:03:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:09,847 INFO L495 AbstractCegarLoop]: Abstraction has 4126 states and 15620 transitions. [2022-11-20 21:03:09,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4126 states and 15620 transitions. [2022-11-20 21:03:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:09,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:09,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:09,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:10,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:10,049 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:10,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1109513402, now seen corresponding path program 1 times [2022-11-20 21:03:10,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:10,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186465013] [2022-11-20 21:03:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:10,050 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 [2022-11-20 21:03:10,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:10,050 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:10,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 21:03:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:03:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:10,263 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:03:10,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:03:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:10,306 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 [2022-11-20 21:03:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:10,348 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 [2022-11-20 21:03:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:10,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:10,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:10,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186465013] [2022-11-20 21:03:10,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186465013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:10,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:10,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861871850] [2022-11-20 21:03:10,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:10,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:10,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:10,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:10,476 INFO L87 Difference]: Start difference. First operand 4126 states and 15620 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:10,973 INFO L93 Difference]: Finished difference Result 4129 states and 15625 transitions. [2022-11-20 21:03:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:10,986 INFO L225 Difference]: With dead ends: 4129 [2022-11-20 21:03:10,987 INFO L226 Difference]: Without dead ends: 4129 [2022-11-20 21:03:10,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:03:10,988 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:10,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-20 21:03:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-11-20 21:03:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4129. [2022-11-20 21:03:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 3635 states have (on average 4.298486932599725) internal successors, (15625), 4128 states have internal predecessors, (15625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 15625 transitions. [2022-11-20 21:03:11,101 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 15625 transitions. Word has length 9 [2022-11-20 21:03:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:11,102 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 15625 transitions. [2022-11-20 21:03:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 15625 transitions. [2022-11-20 21:03:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:11,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:11,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:11,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:11,316 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1109716731, now seen corresponding path program 1 times [2022-11-20 21:03:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:11,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970706077] [2022-11-20 21:03:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:11,317 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 [2022-11-20 21:03:11,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:11,318 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:11,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 21:03:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:03:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:11,589 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:03:11,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:03:11,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:11,637 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 [2022-11-20 21:03:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:11,670 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 [2022-11-20 21:03:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:11,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:11,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970706077] [2022-11-20 21:03:11,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970706077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:11,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:11,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013310554] [2022-11-20 21:03:11,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:11,799 INFO L87 Difference]: Start difference. First operand 4129 states and 15625 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:12,336 INFO L93 Difference]: Finished difference Result 4131 states and 15631 transitions. [2022-11-20 21:03:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:12,349 INFO L225 Difference]: With dead ends: 4131 [2022-11-20 21:03:12,349 INFO L226 Difference]: Without dead ends: 4131 [2022-11-20 21:03:12,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:03:12,350 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:12,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-11-20 21:03:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2022-11-20 21:03:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4131. [2022-11-20 21:03:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4131 states, 3637 states have (on average 4.297772889744294) internal successors, (15631), 4130 states have internal predecessors, (15631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4131 states to 4131 states and 15631 transitions. [2022-11-20 21:03:12,426 INFO L78 Accepts]: Start accepts. Automaton has 4131 states and 15631 transitions. Word has length 9 [2022-11-20 21:03:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:12,427 INFO L495 AbstractCegarLoop]: Abstraction has 4131 states and 15631 transitions. [2022-11-20 21:03:12,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4131 states and 15631 transitions. [2022-11-20 21:03:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:12,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:12,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:12,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:12,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:12,630 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717499, now seen corresponding path program 1 times [2022-11-20 21:03:12,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:12,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522539570] [2022-11-20 21:03:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:12,631 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 [2022-11-20 21:03:12,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:12,632 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:12,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:03:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:12,767 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 [2022-11-20 21:03:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:12,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:12,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522539570] [2022-11-20 21:03:12,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522539570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:12,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:12,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:03:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715237620] [2022-11-20 21:03:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:12,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:12,866 INFO L87 Difference]: Start difference. First operand 4131 states and 15631 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:13,775 INFO L93 Difference]: Finished difference Result 7586 states and 28624 transitions. [2022-11-20 21:03:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:13,802 INFO L225 Difference]: With dead ends: 7586 [2022-11-20 21:03:13,802 INFO L226 Difference]: Without dead ends: 7586 [2022-11-20 21:03:13,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:03:13,803 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 183 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:13,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:03:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7586 states. [2022-11-20 21:03:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7586 to 4417. [2022-11-20 21:03:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4417 states, 3923 states have (on average 4.5449910782564364) internal successors, (17830), 4416 states have internal predecessors, (17830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4417 states to 4417 states and 17830 transitions. [2022-11-20 21:03:13,926 INFO L78 Accepts]: Start accepts. Automaton has 4417 states and 17830 transitions. Word has length 9 [2022-11-20 21:03:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:13,926 INFO L495 AbstractCegarLoop]: Abstraction has 4417 states and 17830 transitions. [2022-11-20 21:03:13,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4417 states and 17830 transitions. [2022-11-20 21:03:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:13,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:13,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:13,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:14,139 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717498, now seen corresponding path program 1 times [2022-11-20 21:03:14,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876266264] [2022-11-20 21:03:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:14,140 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 [2022-11-20 21:03:14,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:14,141 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:14,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 21:03:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:14,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:03:14,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:14,286 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 [2022-11-20 21:03:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:14,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:14,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:14,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876266264] [2022-11-20 21:03:14,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876266264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:14,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:14,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058447157] [2022-11-20 21:03:14,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:14,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:14,310 INFO L87 Difference]: Start difference. First operand 4417 states and 17830 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:14,743 INFO L93 Difference]: Finished difference Result 3400 states and 13646 transitions. [2022-11-20 21:03:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:03:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:14,752 INFO L225 Difference]: With dead ends: 3400 [2022-11-20 21:03:14,752 INFO L226 Difference]: Without dead ends: 3400 [2022-11-20 21:03:14,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:14,753 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:14,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:03:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-20 21:03:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3400. [2022-11-20 21:03:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3078 states have (on average 4.433398310591293) internal successors, (13646), 3399 states have internal predecessors, (13646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 13646 transitions. [2022-11-20 21:03:14,816 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 13646 transitions. Word has length 9 [2022-11-20 21:03:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:14,816 INFO L495 AbstractCegarLoop]: Abstraction has 3400 states and 13646 transitions. [2022-11-20 21:03:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 13646 transitions. [2022-11-20 21:03:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:14,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:14,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:14,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:15,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:15,018 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717561, now seen corresponding path program 1 times [2022-11-20 21:03:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:15,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671644329] [2022-11-20 21:03:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:15,018 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 [2022-11-20 21:03:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:15,019 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:15,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 21:03:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:03:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:15,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:15,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671644329] [2022-11-20 21:03:15,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671644329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:15,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:15,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815803411] [2022-11-20 21:03:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:15,223 INFO L87 Difference]: Start difference. First operand 3400 states and 13646 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:16,118 INFO L93 Difference]: Finished difference Result 3699 states and 14525 transitions. [2022-11-20 21:03:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:16,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:16,130 INFO L225 Difference]: With dead ends: 3699 [2022-11-20 21:03:16,130 INFO L226 Difference]: Without dead ends: 3699 [2022-11-20 21:03:16,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:16,131 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:16,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:03:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2022-11-20 21:03:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3542. [2022-11-20 21:03:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 3220 states have (on average 4.39751552795031) internal successors, (14160), 3541 states have internal predecessors, (14160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 14160 transitions. [2022-11-20 21:03:16,206 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 14160 transitions. Word has length 9 [2022-11-20 21:03:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:16,206 INFO L495 AbstractCegarLoop]: Abstraction has 3542 states and 14160 transitions. [2022-11-20 21:03:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 14160 transitions. [2022-11-20 21:03:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:16,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:16,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:16,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:16,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:16,411 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:16,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1109717382, now seen corresponding path program 1 times [2022-11-20 21:03:16,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:16,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501274262] [2022-11-20 21:03:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:16,411 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 [2022-11-20 21:03:16,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:16,412 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:16,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:03:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:16,619 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:03:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:03:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:16,681 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 [2022-11-20 21:03:16,717 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:03:16,717 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 [2022-11-20 21:03:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:16,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:16,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501274262] [2022-11-20 21:03:16,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501274262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:16,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:16,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:16,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179170207] [2022-11-20 21:03:16,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:16,788 INFO L87 Difference]: Start difference. First operand 3542 states and 14160 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:17,157 INFO L93 Difference]: Finished difference Result 3549 states and 14185 transitions. [2022-11-20 21:03:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:17,170 INFO L225 Difference]: With dead ends: 3549 [2022-11-20 21:03:17,170 INFO L226 Difference]: Without dead ends: 3549 [2022-11-20 21:03:17,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:17,171 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:17,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-20 21:03:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-11-20 21:03:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3549. [2022-11-20 21:03:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 3227 states have (on average 4.395723582274559) internal successors, (14185), 3548 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 14185 transitions. [2022-11-20 21:03:17,263 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 14185 transitions. Word has length 9 [2022-11-20 21:03:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:17,264 INFO L495 AbstractCegarLoop]: Abstraction has 3549 states and 14185 transitions. [2022-11-20 21:03:17,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:17,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 14185 transitions. [2022-11-20 21:03:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:17,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:17,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:17,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:03:17,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:17,465 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2077363410, now seen corresponding path program 1 times [2022-11-20 21:03:17,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768333092] [2022-11-20 21:03:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:17,466 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 [2022-11-20 21:03:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:17,467 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:17,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:03:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:17,758 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:03:17,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:03:17,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:17,801 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 [2022-11-20 21:03:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:17,831 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 [2022-11-20 21:03:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:17,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:17,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:17,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768333092] [2022-11-20 21:03:17,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768333092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:17,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:17,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:17,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655769832] [2022-11-20 21:03:17,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:17,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:17,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:17,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:17,935 INFO L87 Difference]: Start difference. First operand 3549 states and 14185 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:18,452 INFO L93 Difference]: Finished difference Result 3546 states and 14170 transitions. [2022-11-20 21:03:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:03:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:03:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:18,464 INFO L225 Difference]: With dead ends: 3546 [2022-11-20 21:03:18,464 INFO L226 Difference]: Without dead ends: 3546 [2022-11-20 21:03:18,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:03:18,465 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:18,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-11-20 21:03:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2022-11-20 21:03:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3546. [2022-11-20 21:03:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3224 states have (on average 4.395161290322581) internal successors, (14170), 3545 states have internal predecessors, (14170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 14170 transitions. [2022-11-20 21:03:18,550 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 14170 transitions. Word has length 9 [2022-11-20 21:03:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:18,550 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 14170 transitions. [2022-11-20 21:03:18,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 14170 transitions. [2022-11-20 21:03:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:03:18,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:18,550 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1] [2022-11-20 21:03:18,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:18,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:18,751 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:03:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -765156062, now seen corresponding path program 1 times [2022-11-20 21:03:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42926664] [2022-11-20 21:03:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:18,752 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 [2022-11-20 21:03:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:18,753 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:03:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:03:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:03:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:18,922 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 [2022-11-20 21:03:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:19,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:20,803 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42926664] [2022-11-20 21:03:20,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42926664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113784704] [2022-11-20 21:03:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:20,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:03:20,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:03:20,810 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:03:20,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-20 21:03:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:03:21,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:21,088 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 [2022-11-20 21:03:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:21,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:21,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113784704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:21,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589046878] [2022-11-20 21:03:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:21,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:21,987 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:21,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 21:03:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:03:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:22,162 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 [2022-11-20 21:03:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:22,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:22,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589046878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:22,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:03:22,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2022-11-20 21:03:22,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044923386] [2022-11-20 21:03:22,602 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:22,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:03:22,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:03:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:03:22,603 INFO L87 Difference]: Start difference. First operand 3546 states and 14170 transitions. Second operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:27,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:29,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:31,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:33,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:35,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:37,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:40,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:42,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:44,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:46,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:48,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:50,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:04:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:01,431 INFO L93 Difference]: Finished difference Result 31124 states and 125522 transitions. [2022-11-20 21:04:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:04:01,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:04:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:01,555 INFO L225 Difference]: With dead ends: 31124 [2022-11-20 21:04:01,555 INFO L226 Difference]: Without dead ends: 31124 [2022-11-20 21:04:01,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:04:01,556 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2183 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3865 mSolverCounterSat, 259 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3865 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:01,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2183 Valid, 0 Invalid, 4135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3865 Invalid, 11 Unknown, 0 Unchecked, 34.8s Time] [2022-11-20 21:04:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31124 states. [2022-11-20 21:04:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31124 to 3562. [2022-11-20 21:04:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3240 states have (on average 4.381481481481481) internal successors, (14196), 3561 states have internal predecessors, (14196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 14196 transitions. [2022-11-20 21:04:01,915 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 14196 transitions. Word has length 9 [2022-11-20 21:04:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:01,915 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 14196 transitions. [2022-11-20 21:04:01,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 14196 transitions. [2022-11-20 21:04:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:04:01,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:01,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:01,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-20 21:04:02,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-20 21:04:02,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:04:02,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:02,517 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746304, now seen corresponding path program 1 times [2022-11-20 21:04:02,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:02,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661446721] [2022-11-20 21:04:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:02,518 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 [2022-11-20 21:04:02,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:02,519 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:02,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:02,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:04:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:02,812 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:04:02,812 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 [2022-11-20 21:04:02,846 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:04:02,847 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 [2022-11-20 21:04:02,870 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:04:02,870 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 [2022-11-20 21:04:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:02,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:02,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:02,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661446721] [2022-11-20 21:04:02,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661446721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:02,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:02,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106499888] [2022-11-20 21:04:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:02,888 INFO L87 Difference]: Start difference. First operand 3562 states and 14196 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:03,335 INFO L93 Difference]: Finished difference Result 2724 states and 10784 transitions. [2022-11-20 21:04:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:03,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:04:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:03,344 INFO L225 Difference]: With dead ends: 2724 [2022-11-20 21:04:03,344 INFO L226 Difference]: Without dead ends: 2724 [2022-11-20 21:04:03,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:03,345 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:03,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:04:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-11-20 21:04:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2724. [2022-11-20 21:04:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2542 states have (on average 4.242328874901652) internal successors, (10784), 2723 states have internal predecessors, (10784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 10784 transitions. [2022-11-20 21:04:03,402 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 10784 transitions. Word has length 9 [2022-11-20 21:04:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:03,403 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 10784 transitions. [2022-11-20 21:04:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 10784 transitions. [2022-11-20 21:04:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:04:03,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:03,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:03,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:03,604 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746305, now seen corresponding path program 1 times [2022-11-20 21:04:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386628525] [2022-11-20 21:04:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:03,605 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 [2022-11-20 21:04:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:03,606 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:03,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 21:04:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:04:03,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:03,965 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:04:03,966 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 [2022-11-20 21:04:04,111 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:04:04,112 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 [2022-11-20 21:04:04,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:04:04,266 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 [2022-11-20 21:04:04,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:04,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:04,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:04,354 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:04,355 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 [2022-11-20 21:04:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:04,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:11,043 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:04:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:13,403 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386628525] [2022-11-20 21:04:13,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386628525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [642549672] [2022-11-20 21:04:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:13,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:04:13,411 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:04:13,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-20 21:04:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:13,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:13,916 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:04:13,916 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 [2022-11-20 21:04:14,055 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:04:14,056 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 [2022-11-20 21:04:14,296 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:04:14,297 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 [2022-11-20 21:04:14,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:14,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:14,378 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:14,378 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 [2022-11-20 21:04:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:14,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:18,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [642549672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:18,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053465955] [2022-11-20 21:04:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:18,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:18,422 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:18,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 21:04:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:04:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:18,712 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:04:18,712 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 [2022-11-20 21:04:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:18,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:18,879 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:04:18,880 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 [2022-11-20 21:04:18,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:18,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:18,939 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:18,939 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 [2022-11-20 21:04:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:18,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:21,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:04:21,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-11-20 21:04:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:25,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053465955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:25,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:04:25,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-20 21:04:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280411339] [2022-11-20 21:04:25,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 21:04:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 21:04:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2022-11-20 21:04:25,149 INFO L87 Difference]: Start difference. First operand 2724 states and 10784 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:29,700 INFO L93 Difference]: Finished difference Result 6809 states and 27226 transitions. [2022-11-20 21:04:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 21:04:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:04:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:29,720 INFO L225 Difference]: With dead ends: 6809 [2022-11-20 21:04:29,720 INFO L226 Difference]: Without dead ends: 6809 [2022-11-20 21:04:29,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=169, Invalid=532, Unknown=1, NotChecked=0, Total=702 [2022-11-20 21:04:29,721 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 555 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1963 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:29,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 789 Invalid, 0 Unknown, 1963 Unchecked, 3.6s Time] [2022-11-20 21:04:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6809 states. [2022-11-20 21:04:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6809 to 2961. [2022-11-20 21:04:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2779 states have (on average 4.328175602734797) internal successors, (12028), 2960 states have internal predecessors, (12028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 12028 transitions. [2022-11-20 21:04:29,835 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 12028 transitions. Word has length 9 [2022-11-20 21:04:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:29,835 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 12028 transitions. [2022-11-20 21:04:29,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 12028 transitions. [2022-11-20 21:04:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:04:29,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:29,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:29,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:30,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-20 21:04:30,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 21:04:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:30,443 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746514, now seen corresponding path program 1 times [2022-11-20 21:04:30,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:30,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706312590] [2022-11-20 21:04:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:30,444 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 [2022-11-20 21:04:30,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:30,445 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:30,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (39)] Waiting until timeout for monitored process [2022-11-20 21:04:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:04:30,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:30,670 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 [2022-11-20 21:04:30,701 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:04:30,702 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 [2022-11-20 21:04:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:30,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:30,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706312590] [2022-11-20 21:04:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706312590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:30,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:30,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:30,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763955297] [2022-11-20 21:04:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:30,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:30,720 INFO L87 Difference]: Start difference. First operand 2961 states and 12028 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:31,093 INFO L93 Difference]: Finished difference Result 2300 states and 9281 transitions. [2022-11-20 21:04:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:04:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:31,100 INFO L225 Difference]: With dead ends: 2300 [2022-11-20 21:04:31,100 INFO L226 Difference]: Without dead ends: 2300 [2022-11-20 21:04:31,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:31,101 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:31,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:04:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-11-20 21:04:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2300. [2022-11-20 21:04:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2194 states have (on average 4.230173199635369) internal successors, (9281), 2299 states have internal predecessors, (9281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 9281 transitions. [2022-11-20 21:04:31,147 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 9281 transitions. Word has length 9 [2022-11-20 21:04:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:31,147 INFO L495 AbstractCegarLoop]: Abstraction has 2300 states and 9281 transitions. [2022-11-20 21:04:31,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 9281 transitions. [2022-11-20 21:04:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:04:31,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:31,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:31,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (39)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:31,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:31,349 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1453746515, now seen corresponding path program 1 times [2022-11-20 21:04:31,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:31,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955123349] [2022-11-20 21:04:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:31,349 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 [2022-11-20 21:04:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:31,350 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:31,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 21:04:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:31,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:31,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:31,630 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 [2022-11-20 21:04:31,642 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 [2022-11-20 21:04:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:31,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:31,741 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:31,741 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 [2022-11-20 21:04:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:34,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955123349] [2022-11-20 21:04:34,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955123349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [611804300] [2022-11-20 21:04:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:34,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:34,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:04:34,403 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:04:34,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-20 21:04:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:04:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:34,769 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 [2022-11-20 21:04:34,780 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 [2022-11-20 21:04:34,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:34,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:34,918 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:34,919 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 [2022-11-20 21:04:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:34,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:35,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [611804300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:35,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110400093] [2022-11-20 21:04:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:35,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:35,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:35,191 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:35,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 21:04:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:35,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:35,382 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 [2022-11-20 21:04:35,394 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 [2022-11-20 21:04:35,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:35,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:35,460 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:35,460 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 [2022-11-20 21:04:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:35,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:35,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110400093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:35,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:04:35,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-11-20 21:04:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564862051] [2022-11-20 21:04:35,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:35,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:04:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:35,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:04:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:04:35,763 INFO L87 Difference]: Start difference. First operand 2300 states and 9281 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:37,027 INFO L93 Difference]: Finished difference Result 3032 states and 11720 transitions. [2022-11-20 21:04:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:04:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:04:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:37,037 INFO L225 Difference]: With dead ends: 3032 [2022-11-20 21:04:37,037 INFO L226 Difference]: Without dead ends: 3032 [2022-11-20 21:04:37,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:04:37,043 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:37,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 0 Unknown, 348 Unchecked, 1.2s Time] [2022-11-20 21:04:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-11-20 21:04:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2452. [2022-11-20 21:04:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2346 states have (on average 4.202898550724638) internal successors, (9860), 2451 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 9860 transitions. [2022-11-20 21:04:37,093 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 9860 transitions. Word has length 9 [2022-11-20 21:04:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:37,093 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 9860 transitions. [2022-11-20 21:04:37,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 9860 transitions. [2022-11-20 21:04:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:37,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:37,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:37,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:37,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:04:37,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:37,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:37,701 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash -66730472, now seen corresponding path program 1 times [2022-11-20 21:04:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:37,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025022494] [2022-11-20 21:04:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:37,702 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 [2022-11-20 21:04:37,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:37,703 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:37,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 21:04:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:37,958 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:37,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:38,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:38,012 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 [2022-11-20 21:04:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:38,050 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 [2022-11-20 21:04:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:38,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:38,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:38,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025022494] [2022-11-20 21:04:38,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025022494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:38,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:38,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:38,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231276066] [2022-11-20 21:04:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:38,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:38,199 INFO L87 Difference]: Start difference. First operand 2452 states and 9860 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:38,621 INFO L93 Difference]: Finished difference Result 2458 states and 9870 transitions. [2022-11-20 21:04:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:38,631 INFO L225 Difference]: With dead ends: 2458 [2022-11-20 21:04:38,631 INFO L226 Difference]: Without dead ends: 2458 [2022-11-20 21:04:38,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:38,632 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:38,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-11-20 21:04:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-20 21:04:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2452. [2022-11-20 21:04:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2346 states have (on average 4.202898550724638) internal successors, (9860), 2451 states have internal predecessors, (9860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 9860 transitions. [2022-11-20 21:04:38,684 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 9860 transitions. Word has length 10 [2022-11-20 21:04:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:38,684 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 9860 transitions. [2022-11-20 21:04:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 9860 transitions. [2022-11-20 21:04:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:38,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:38,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:38,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-20 21:04:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:38,886 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -69346872, now seen corresponding path program 1 times [2022-11-20 21:04:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:38,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363031468] [2022-11-20 21:04:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:38,887 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 [2022-11-20 21:04:38,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:38,888 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:38,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 21:04:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:04:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:39,138 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:39,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:39,191 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 [2022-11-20 21:04:39,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:39,229 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 [2022-11-20 21:04:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:39,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:39,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:39,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363031468] [2022-11-20 21:04:39,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363031468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:39,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:39,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:39,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476908471] [2022-11-20 21:04:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:39,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:39,373 INFO L87 Difference]: Start difference. First operand 2452 states and 9860 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:39,708 INFO L93 Difference]: Finished difference Result 2455 states and 9871 transitions. [2022-11-20 21:04:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:39,715 INFO L225 Difference]: With dead ends: 2455 [2022-11-20 21:04:39,715 INFO L226 Difference]: Without dead ends: 2455 [2022-11-20 21:04:39,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:39,716 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:39,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-20 21:04:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-11-20 21:04:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2455. [2022-11-20 21:04:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2349 states have (on average 4.202213707960834) internal successors, (9871), 2454 states have internal predecessors, (9871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 9871 transitions. [2022-11-20 21:04:39,753 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 9871 transitions. Word has length 10 [2022-11-20 21:04:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:39,753 INFO L495 AbstractCegarLoop]: Abstraction has 2455 states and 9871 transitions. [2022-11-20 21:04:39,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 9871 transitions. [2022-11-20 21:04:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:39,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:39,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:39,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-20 21:04:39,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:39,959 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -69347523, now seen corresponding path program 1 times [2022-11-20 21:04:39,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674918467] [2022-11-20 21:04:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:39,959 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 [2022-11-20 21:04:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:39,960 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:39,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:04:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:40,244 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:40,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:40,298 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 [2022-11-20 21:04:40,349 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:04:40,350 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 [2022-11-20 21:04:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:40,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:40,432 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:40,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674918467] [2022-11-20 21:04:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674918467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:40,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088586421] [2022-11-20 21:04:40,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:40,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:40,433 INFO L87 Difference]: Start difference. First operand 2455 states and 9871 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 21:04:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:40,825 INFO L93 Difference]: Finished difference Result 2460 states and 9887 transitions. [2022-11-20 21:04:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 21:04:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:40,880 INFO L225 Difference]: With dead ends: 2460 [2022-11-20 21:04:40,880 INFO L226 Difference]: Without dead ends: 2460 [2022-11-20 21:04:40,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:40,880 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:40,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:04:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2022-11-20 21:04:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2460. [2022-11-20 21:04:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2354 states have (on average 4.200084961767205) internal successors, (9887), 2459 states have internal predecessors, (9887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 9887 transitions. [2022-11-20 21:04:40,926 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 9887 transitions. Word has length 10 [2022-11-20 21:04:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:40,927 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 9887 transitions. [2022-11-20 21:04:40,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 21:04:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 9887 transitions. [2022-11-20 21:04:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:40,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:40,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:40,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:04:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:41,130 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash -35176595, now seen corresponding path program 1 times [2022-11-20 21:04:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:41,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35195402] [2022-11-20 21:04:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:41,132 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 [2022-11-20 21:04:41,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:41,133 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:41,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:04:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:41,400 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:41,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:41,453 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 [2022-11-20 21:04:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:41,490 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 [2022-11-20 21:04:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:41,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:41,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35195402] [2022-11-20 21:04:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35195402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:41,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:41,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:41,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750023037] [2022-11-20 21:04:41,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:41,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:41,640 INFO L87 Difference]: Start difference. First operand 2460 states and 9887 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:42,196 INFO L93 Difference]: Finished difference Result 2467 states and 9898 transitions. [2022-11-20 21:04:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:42,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:42,204 INFO L225 Difference]: With dead ends: 2467 [2022-11-20 21:04:42,204 INFO L226 Difference]: Without dead ends: 2467 [2022-11-20 21:04:42,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:42,205 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:42,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-11-20 21:04:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-11-20 21:04:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2467. [2022-11-20 21:04:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2361 states have (on average 4.192291401948327) internal successors, (9898), 2466 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 9898 transitions. [2022-11-20 21:04:42,250 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 9898 transitions. Word has length 10 [2022-11-20 21:04:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:42,250 INFO L495 AbstractCegarLoop]: Abstraction has 2467 states and 9898 transitions. [2022-11-20 21:04:42,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 9898 transitions. [2022-11-20 21:04:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:42,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:42,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:42,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:04:42,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:42,452 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash -35177246, now seen corresponding path program 1 times [2022-11-20 21:04:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:42,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26813113] [2022-11-20 21:04:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:42,453 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 [2022-11-20 21:04:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:42,454 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:42,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:42,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:04:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:42,709 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:42,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:42,762 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 [2022-11-20 21:04:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:42,798 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 [2022-11-20 21:04:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:42,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:42,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26813113] [2022-11-20 21:04:42,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26813113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:42,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:42,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:42,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295270263] [2022-11-20 21:04:42,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:42,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:42,942 INFO L87 Difference]: Start difference. First operand 2467 states and 9898 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:43,382 INFO L93 Difference]: Finished difference Result 2472 states and 9920 transitions. [2022-11-20 21:04:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:43,388 INFO L225 Difference]: With dead ends: 2472 [2022-11-20 21:04:43,388 INFO L226 Difference]: Without dead ends: 2472 [2022-11-20 21:04:43,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:43,389 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:43,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:04:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2022-11-20 21:04:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2472. [2022-11-20 21:04:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2366 states have (on average 4.1927303465765) internal successors, (9920), 2471 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 9920 transitions. [2022-11-20 21:04:43,431 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 9920 transitions. Word has length 10 [2022-11-20 21:04:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:43,431 INFO L495 AbstractCegarLoop]: Abstraction has 2472 states and 9920 transitions. [2022-11-20 21:04:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 9920 transitions. [2022-11-20 21:04:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:43,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:43,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:43,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:04:43,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:43,632 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -41497867, now seen corresponding path program 1 times [2022-11-20 21:04:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:43,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301411532] [2022-11-20 21:04:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:43,633 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 [2022-11-20 21:04:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:43,634 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:43,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:43,909 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:43,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:43,973 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 [2022-11-20 21:04:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:44,014 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 [2022-11-20 21:04:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:44,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:44,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301411532] [2022-11-20 21:04:44,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301411532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:44,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:44,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:44,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677105437] [2022-11-20 21:04:44,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:44,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:44,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:44,161 INFO L87 Difference]: Start difference. First operand 2472 states and 9920 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:44,570 INFO L93 Difference]: Finished difference Result 2475 states and 9929 transitions. [2022-11-20 21:04:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:44,579 INFO L225 Difference]: With dead ends: 2475 [2022-11-20 21:04:44,579 INFO L226 Difference]: Without dead ends: 2475 [2022-11-20 21:04:44,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:44,580 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:44,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:04:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-11-20 21:04:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2475. [2022-11-20 21:04:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2369 states have (on average 4.191219924018573) internal successors, (9929), 2474 states have internal predecessors, (9929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9929 transitions. [2022-11-20 21:04:44,631 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9929 transitions. Word has length 10 [2022-11-20 21:04:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:44,631 INFO L495 AbstractCegarLoop]: Abstraction has 2475 states and 9929 transitions. [2022-11-20 21:04:44,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9929 transitions. [2022-11-20 21:04:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:44,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:44,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:44,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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)] Ended with exit code 0 [2022-11-20 21:04:44,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:44,835 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash 25345291, now seen corresponding path program 1 times [2022-11-20 21:04:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416378184] [2022-11-20 21:04:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:44,835 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 [2022-11-20 21:04:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:44,836 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (49)] Waiting until timeout for monitored process [2022-11-20 21:04:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:04:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:45,182 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:45,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:45,232 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 [2022-11-20 21:04:45,286 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:04:45,286 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 [2022-11-20 21:04:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:45,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:45,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:45,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416378184] [2022-11-20 21:04:45,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416378184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:45,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:45,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131235880] [2022-11-20 21:04:45,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:45,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:45,374 INFO L87 Difference]: Start difference. First operand 2475 states and 9929 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 21:04:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:45,742 INFO L93 Difference]: Finished difference Result 2491 states and 9966 transitions. [2022-11-20 21:04:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 21:04:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:45,751 INFO L225 Difference]: With dead ends: 2491 [2022-11-20 21:04:45,751 INFO L226 Difference]: Without dead ends: 2491 [2022-11-20 21:04:45,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:45,751 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:45,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-20 21:04:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-11-20 21:04:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2491. [2022-11-20 21:04:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2385 states have (on average 4.178616352201258) internal successors, (9966), 2490 states have internal predecessors, (9966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 9966 transitions. [2022-11-20 21:04:45,804 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 9966 transitions. Word has length 10 [2022-11-20 21:04:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:45,804 INFO L495 AbstractCegarLoop]: Abstraction has 2491 states and 9966 transitions. [2022-11-20 21:04:45,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 21:04:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 9966 transitions. [2022-11-20 21:04:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:45,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:45,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:45,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (49)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:46,005 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 26447558, now seen corresponding path program 1 times [2022-11-20 21:04:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700811519] [2022-11-20 21:04:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:46,006 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 [2022-11-20 21:04:46,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:46,007 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:46,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (50)] Waiting until timeout for monitored process [2022-11-20 21:04:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:04:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:46,334 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:46,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:46,385 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 [2022-11-20 21:04:46,429 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:04:46,429 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 [2022-11-20 21:04:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:46,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:46,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:46,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700811519] [2022-11-20 21:04:46,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700811519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:46,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:46,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314564301] [2022-11-20 21:04:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:46,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:46,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:46,522 INFO L87 Difference]: Start difference. First operand 2491 states and 9966 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 21:04:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:46,931 INFO L93 Difference]: Finished difference Result 2503 states and 9986 transitions. [2022-11-20 21:04:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:46,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 21:04:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:46,939 INFO L225 Difference]: With dead ends: 2503 [2022-11-20 21:04:46,939 INFO L226 Difference]: Without dead ends: 2503 [2022-11-20 21:04:46,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:46,939 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:46,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:04:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-11-20 21:04:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2491. [2022-11-20 21:04:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2385 states have (on average 4.178616352201258) internal successors, (9966), 2490 states have internal predecessors, (9966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 9966 transitions. [2022-11-20 21:04:46,988 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 9966 transitions. Word has length 10 [2022-11-20 21:04:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:46,988 INFO L495 AbstractCegarLoop]: Abstraction has 2491 states and 9966 transitions. [2022-11-20 21:04:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 21:04:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 9966 transitions. [2022-11-20 21:04:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:46,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:46,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:47,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (50)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:47,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:47,189 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash 26244229, now seen corresponding path program 1 times [2022-11-20 21:04:47,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:47,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322686634] [2022-11-20 21:04:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:47,190 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 [2022-11-20 21:04:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:47,191 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:47,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (51)] Waiting until timeout for monitored process [2022-11-20 21:04:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:47,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:47,499 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:47,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:47,556 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 [2022-11-20 21:04:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:47,592 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 [2022-11-20 21:04:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:47,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:47,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:47,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322686634] [2022-11-20 21:04:47,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322686634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:47,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:47,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:47,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290781634] [2022-11-20 21:04:47,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:47,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:47,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:47,735 INFO L87 Difference]: Start difference. First operand 2491 states and 9966 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:48,148 INFO L93 Difference]: Finished difference Result 2495 states and 9978 transitions. [2022-11-20 21:04:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:48,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:48,155 INFO L225 Difference]: With dead ends: 2495 [2022-11-20 21:04:48,156 INFO L226 Difference]: Without dead ends: 2495 [2022-11-20 21:04:48,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:48,156 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:48,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:04:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-11-20 21:04:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2492. [2022-11-20 21:04:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2386 states have (on average 4.178122380553227) internal successors, (9969), 2491 states have internal predecessors, (9969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 9969 transitions. [2022-11-20 21:04:48,203 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 9969 transitions. Word has length 10 [2022-11-20 21:04:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:48,203 INFO L495 AbstractCegarLoop]: Abstraction has 2492 states and 9969 transitions. [2022-11-20 21:04:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 9969 transitions. [2022-11-20 21:04:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:48,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:48,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:48,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (51)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:48,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:48,404 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 26243578, now seen corresponding path program 1 times [2022-11-20 21:04:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619815280] [2022-11-20 21:04:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:48,405 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 [2022-11-20 21:04:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:48,406 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (52)] Waiting until timeout for monitored process [2022-11-20 21:04:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:48,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:04:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:48,719 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:04:48,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:04:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:48,772 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 [2022-11-20 21:04:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:48,806 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 [2022-11-20 21:04:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:48,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:48,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619815280] [2022-11-20 21:04:48,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619815280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:48,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:48,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604999711] [2022-11-20 21:04:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:48,944 INFO L87 Difference]: Start difference. First operand 2492 states and 9969 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:49,340 INFO L93 Difference]: Finished difference Result 2486 states and 9935 transitions. [2022-11-20 21:04:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-20 21:04:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:49,348 INFO L225 Difference]: With dead ends: 2486 [2022-11-20 21:04:49,348 INFO L226 Difference]: Without dead ends: 2486 [2022-11-20 21:04:49,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:49,349 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:49,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:04:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-11-20 21:04:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2486. [2022-11-20 21:04:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2380 states have (on average 4.17436974789916) internal successors, (9935), 2485 states have internal predecessors, (9935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 9935 transitions. [2022-11-20 21:04:49,398 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 9935 transitions. Word has length 10 [2022-11-20 21:04:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:49,398 INFO L495 AbstractCegarLoop]: Abstraction has 2486 states and 9935 transitions. [2022-11-20 21:04:49,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-20 21:04:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 9935 transitions. [2022-11-20 21:04:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:49,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:49,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:49,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (52)] Ended with exit code 0 [2022-11-20 21:04:49,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:49,607 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:49,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:49,607 INFO L85 PathProgramCache]: Analyzing trace with hash -849346041, now seen corresponding path program 1 times [2022-11-20 21:04:49,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:49,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283015399] [2022-11-20 21:04:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:49,608 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 [2022-11-20 21:04:49,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:49,609 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:49,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (53)] Waiting until timeout for monitored process [2022-11-20 21:04:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:49,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:04:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:49,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:49,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283015399] [2022-11-20 21:04:49,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283015399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:49,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:49,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:04:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271653605] [2022-11-20 21:04:49,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:49,907 INFO L87 Difference]: Start difference. First operand 2486 states and 9935 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2022-11-20 21:04:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:50,909 INFO L93 Difference]: Finished difference Result 3423 states and 13276 transitions. [2022-11-20 21:04:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2022-11-20 21:04:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:50,919 INFO L225 Difference]: With dead ends: 3423 [2022-11-20 21:04:50,919 INFO L226 Difference]: Without dead ends: 3423 [2022-11-20 21:04:50,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:04:50,919 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 98 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:50,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 5 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:04:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2022-11-20 21:04:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 2791. [2022-11-20 21:04:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2685 states have (on average 4.206703910614525) internal successors, (11295), 2790 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 11295 transitions. [2022-11-20 21:04:51,024 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 11295 transitions. Word has length 10 [2022-11-20 21:04:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:51,025 INFO L495 AbstractCegarLoop]: Abstraction has 2791 states and 11295 transitions. [2022-11-20 21:04:51,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2022-11-20 21:04:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 11295 transitions. [2022-11-20 21:04:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:51,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:51,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:51,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (53)] Ended with exit code 0 [2022-11-20 21:04:51,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:51,226 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:51,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2116463761, now seen corresponding path program 1 times [2022-11-20 21:04:51,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129904658] [2022-11-20 21:04:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:51,228 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 [2022-11-20 21:04:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:51,229 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:51,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (54)] Waiting until timeout for monitored process [2022-11-20 21:04:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:04:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:51,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:51,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:51,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129904658] [2022-11-20 21:04:51,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129904658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:51,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:51,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:04:51,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904630120] [2022-11-20 21:04:51,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:51,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:04:51,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:51,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:04:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:51,478 INFO L87 Difference]: Start difference. First operand 2791 states and 11295 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2022-11-20 21:04:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:52,555 INFO L93 Difference]: Finished difference Result 5161 states and 20378 transitions. [2022-11-20 21:04:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:04:52,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2022-11-20 21:04:52,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:52,573 INFO L225 Difference]: With dead ends: 5161 [2022-11-20 21:04:52,574 INFO L226 Difference]: Without dead ends: 5161 [2022-11-20 21:04:52,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:04:52,574 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 176 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:52,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 21:04:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-11-20 21:04:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3237. [2022-11-20 21:04:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3131 states have (on average 4.441711913126796) internal successors, (13907), 3236 states have internal predecessors, (13907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 13907 transitions. [2022-11-20 21:04:52,668 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 13907 transitions. Word has length 10 [2022-11-20 21:04:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:52,669 INFO L495 AbstractCegarLoop]: Abstraction has 3237 states and 13907 transitions. [2022-11-20 21:04:52,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2022-11-20 21:04:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 13907 transitions. [2022-11-20 21:04:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:04:52,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:52,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:52,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (54)] Ended with exit code 0 [2022-11-20 21:04:52,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:04:52,884 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:04:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2116471295, now seen corresponding path program 1 times [2022-11-20 21:04:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645705306] [2022-11-20 21:04:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:52,885 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 [2022-11-20 21:04:52,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:52,886 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:04:52,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (55)] Waiting until timeout for monitored process [2022-11-20 21:04:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:53,234 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 [2022-11-20 21:04:53,243 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 [2022-11-20 21:04:53,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:53,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:53,350 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:53,350 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 [2022-11-20 21:04:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:56,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645705306] [2022-11-20 21:04:56,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645705306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031952938] [2022-11-20 21:04:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:56,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:04:56,047 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:04:56,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-20 21:04:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:56,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:04:56,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:56,492 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 [2022-11-20 21:04:56,499 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 [2022-11-20 21:04:56,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:56,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:56,642 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:56,642 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 [2022-11-20 21:04:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:56,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:56,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2031952938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:56,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241468664] [2022-11-20 21:04:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:56,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:56,930 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:56,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 21:04:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:04:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:57,142 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 [2022-11-20 21:04:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:57,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:57,246 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:57,246 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 [2022-11-20 21:04:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:57,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:57,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:04:57,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-20 21:05:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:00,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241468664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:00,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:05:00,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 13 [2022-11-20 21:05:00,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086695239] [2022-11-20 21:05:00,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:00,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:05:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:05:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-11-20 21:05:00,063 INFO L87 Difference]: Start difference. First operand 3237 states and 13907 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:03,569 INFO L93 Difference]: Finished difference Result 7184 states and 29860 transitions. [2022-11-20 21:05:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:05:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:05:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:03,592 INFO L225 Difference]: With dead ends: 7184 [2022-11-20 21:05:03,593 INFO L226 Difference]: Without dead ends: 7184 [2022-11-20 21:05:03,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=72, Invalid=199, Unknown=1, NotChecked=0, Total=272 [2022-11-20 21:05:03,593 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 185 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:03,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 0 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 716 Invalid, 0 Unknown, 296 Unchecked, 3.2s Time] [2022-11-20 21:05:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2022-11-20 21:05:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 3253. [2022-11-20 21:05:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 3147 states have (on average 4.4337464251668255) internal successors, (13953), 3252 states have internal predecessors, (13953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 13953 transitions. [2022-11-20 21:05:03,686 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 13953 transitions. Word has length 10 [2022-11-20 21:05:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:03,687 INFO L495 AbstractCegarLoop]: Abstraction has 3253 states and 13953 transitions. [2022-11-20 21:05:03,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 13953 transitions. [2022-11-20 21:05:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:05:03,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:03,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:03,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-20 21:05:03,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:04,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (55)] Ended with exit code 0 [2022-11-20 21:05:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:04,288 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2116507565, now seen corresponding path program 2 times [2022-11-20 21:05:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998549824] [2022-11-20 21:05:04,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:05:04,289 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 [2022-11-20 21:05:04,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:04,290 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (58)] Waiting until timeout for monitored process [2022-11-20 21:05:04,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:05:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:05:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:05:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:04,576 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 [2022-11-20 21:05:04,583 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 [2022-11-20 21:05:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:04,637 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 16 [2022-11-20 21:05:04,654 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:04,655 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 [2022-11-20 21:05:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:05:04,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:04,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:04,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998549824] [2022-11-20 21:05:04,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998549824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:04,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:04,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:05:04,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492825573] [2022-11-20 21:05:04,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:04,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:04,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:04,741 INFO L87 Difference]: Start difference. First operand 3253 states and 13953 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2022-11-20 21:05:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:05,567 INFO L93 Difference]: Finished difference Result 4436 states and 17746 transitions. [2022-11-20 21:05:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2022-11-20 21:05:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:05,579 INFO L225 Difference]: With dead ends: 4436 [2022-11-20 21:05:05,579 INFO L226 Difference]: Without dead ends: 4436 [2022-11-20 21:05:05,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:05,580 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:05,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:05:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2022-11-20 21:05:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3242. [2022-11-20 21:05:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 3136 states have (on average 4.318239795918367) internal successors, (13542), 3241 states have internal predecessors, (13542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 13542 transitions. [2022-11-20 21:05:05,644 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 13542 transitions. Word has length 10 [2022-11-20 21:05:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:05,644 INFO L495 AbstractCegarLoop]: Abstraction has 3242 states and 13542 transitions. [2022-11-20 21:05:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2022-11-20 21:05:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 13542 transitions. [2022-11-20 21:05:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:05,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:05,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:05,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (58)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:05,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:05,845 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2068644133, now seen corresponding path program 1 times [2022-11-20 21:05:05,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:05,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211832277] [2022-11-20 21:05:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:05,846 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 [2022-11-20 21:05:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:05,847 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:05,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (59)] Waiting until timeout for monitored process [2022-11-20 21:05:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:05:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:06,122 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:06,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:06,168 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 [2022-11-20 21:05:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:06,201 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 [2022-11-20 21:05:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:06,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:06,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211832277] [2022-11-20 21:05:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211832277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:06,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:06,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:06,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869361619] [2022-11-20 21:05:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:06,354 INFO L87 Difference]: Start difference. First operand 3242 states and 13542 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:06,739 INFO L93 Difference]: Finished difference Result 3246 states and 13548 transitions. [2022-11-20 21:05:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:06,749 INFO L225 Difference]: With dead ends: 3246 [2022-11-20 21:05:06,749 INFO L226 Difference]: Without dead ends: 3246 [2022-11-20 21:05:06,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:06,750 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:06,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-20 21:05:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2022-11-20 21:05:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3245. [2022-11-20 21:05:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3139 states have (on average 4.315705638738452) internal successors, (13547), 3244 states have internal predecessors, (13547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 13547 transitions. [2022-11-20 21:05:06,814 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 13547 transitions. Word has length 11 [2022-11-20 21:05:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:06,814 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 13547 transitions. [2022-11-20 21:05:06,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 13547 transitions. [2022-11-20 21:05:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:06,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:06,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:06,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (59)] Ended with exit code 0 [2022-11-20 21:05:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:07,016 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2068644784, now seen corresponding path program 1 times [2022-11-20 21:05:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:07,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446789104] [2022-11-20 21:05:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:07,016 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 [2022-11-20 21:05:07,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:07,018 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:07,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (60)] Waiting until timeout for monitored process [2022-11-20 21:05:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:05:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:07,319 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:07,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:07,367 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 [2022-11-20 21:05:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:07,401 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 [2022-11-20 21:05:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:07,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:07,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446789104] [2022-11-20 21:05:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446789104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:07,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:07,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:07,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653986415] [2022-11-20 21:05:07,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:07,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:07,551 INFO L87 Difference]: Start difference. First operand 3245 states and 13547 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:08,055 INFO L93 Difference]: Finished difference Result 3249 states and 13550 transitions. [2022-11-20 21:05:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:08,065 INFO L225 Difference]: With dead ends: 3249 [2022-11-20 21:05:08,065 INFO L226 Difference]: Without dead ends: 3249 [2022-11-20 21:05:08,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:08,066 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:08,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-20 21:05:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-11-20 21:05:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 3236. [2022-11-20 21:05:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3130 states have (on average 4.318210862619808) internal successors, (13516), 3235 states have internal predecessors, (13516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 13516 transitions. [2022-11-20 21:05:08,124 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 13516 transitions. Word has length 11 [2022-11-20 21:05:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:08,124 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 13516 transitions. [2022-11-20 21:05:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 13516 transitions. [2022-11-20 21:05:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:08,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:08,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:08,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (60)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:08,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:08,338 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2145196690, now seen corresponding path program 1 times [2022-11-20 21:05:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:08,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409508914] [2022-11-20 21:05:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:08,339 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 [2022-11-20 21:05:08,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:08,340 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:08,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (61)] Waiting until timeout for monitored process [2022-11-20 21:05:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:08,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:05:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:08,624 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:08,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:08,677 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 [2022-11-20 21:05:08,723 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:05:08,723 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 [2022-11-20 21:05:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:08,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:08,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:08,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409508914] [2022-11-20 21:05:08,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409508914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:08,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:08,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:05:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300059545] [2022-11-20 21:05:08,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:08,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:05:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:05:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:05:08,803 INFO L87 Difference]: Start difference. First operand 3236 states and 13516 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:09,180 INFO L93 Difference]: Finished difference Result 3247 states and 13548 transitions. [2022-11-20 21:05:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:09,190 INFO L225 Difference]: With dead ends: 3247 [2022-11-20 21:05:09,190 INFO L226 Difference]: Without dead ends: 3247 [2022-11-20 21:05:09,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:09,190 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:09,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-20 21:05:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-20 21:05:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3247. [2022-11-20 21:05:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3141 states have (on average 4.313276026743075) internal successors, (13548), 3246 states have internal predecessors, (13548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 13548 transitions. [2022-11-20 21:05:09,249 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 13548 transitions. Word has length 11 [2022-11-20 21:05:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:09,249 INFO L495 AbstractCegarLoop]: Abstraction has 3247 states and 13548 transitions. [2022-11-20 21:05:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 13548 transitions. [2022-11-20 21:05:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:09,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:09,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:09,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (61)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:09,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:09,450 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1090492019, now seen corresponding path program 1 times [2022-11-20 21:05:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104690778] [2022-11-20 21:05:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:09,451 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 [2022-11-20 21:05:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:09,452 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:09,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (62)] Waiting until timeout for monitored process [2022-11-20 21:05:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:05:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:09,741 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:09,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:09,789 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 [2022-11-20 21:05:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:09,821 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 [2022-11-20 21:05:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:09,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:09,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104690778] [2022-11-20 21:05:09,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104690778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:09,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:09,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:09,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069365237] [2022-11-20 21:05:09,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:09,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:09,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:09,967 INFO L87 Difference]: Start difference. First operand 3247 states and 13548 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:10,366 INFO L93 Difference]: Finished difference Result 3255 states and 13565 transitions. [2022-11-20 21:05:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:10,376 INFO L225 Difference]: With dead ends: 3255 [2022-11-20 21:05:10,376 INFO L226 Difference]: Without dead ends: 3255 [2022-11-20 21:05:10,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:10,376 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:10,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:05:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-11-20 21:05:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3254. [2022-11-20 21:05:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3148 states have (on average 4.30876747141042) internal successors, (13564), 3253 states have internal predecessors, (13564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 13564 transitions. [2022-11-20 21:05:10,433 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 13564 transitions. Word has length 11 [2022-11-20 21:05:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:10,434 INFO L495 AbstractCegarLoop]: Abstraction has 3254 states and 13564 transitions. [2022-11-20 21:05:10,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 13564 transitions. [2022-11-20 21:05:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:10,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:10,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:10,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (62)] Ended with exit code 0 [2022-11-20 21:05:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:10,639 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1285497160, now seen corresponding path program 1 times [2022-11-20 21:05:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979982180] [2022-11-20 21:05:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:10,639 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 [2022-11-20 21:05:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:10,640 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:10,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (63)] Waiting until timeout for monitored process [2022-11-20 21:05:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:10,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:05:10,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:10,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:10,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979982180] [2022-11-20 21:05:10,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979982180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:10,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:10,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:05:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207435284] [2022-11-20 21:05:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:10,922 INFO L87 Difference]: Start difference. First operand 3254 states and 13564 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:11,749 INFO L93 Difference]: Finished difference Result 3555 states and 14270 transitions. [2022-11-20 21:05:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:11,760 INFO L225 Difference]: With dead ends: 3555 [2022-11-20 21:05:11,760 INFO L226 Difference]: Without dead ends: 3555 [2022-11-20 21:05:11,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:11,760 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:11,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:05:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2022-11-20 21:05:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3360. [2022-11-20 21:05:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3254 states have (on average 4.241856177012907) internal successors, (13803), 3359 states have internal predecessors, (13803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 13803 transitions. [2022-11-20 21:05:11,819 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 13803 transitions. Word has length 11 [2022-11-20 21:05:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:11,819 INFO L495 AbstractCegarLoop]: Abstraction has 3360 states and 13803 transitions. [2022-11-20 21:05:11,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 13803 transitions. [2022-11-20 21:05:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:11,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:11,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:11,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (63)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:12,020 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 788320920, now seen corresponding path program 1 times [2022-11-20 21:05:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264456083] [2022-11-20 21:05:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:12,021 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 [2022-11-20 21:05:12,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:12,022 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:12,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (64)] Waiting until timeout for monitored process [2022-11-20 21:05:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:05:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:12,340 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:12,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:12,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:12,385 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 [2022-11-20 21:05:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:12,417 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 [2022-11-20 21:05:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:12,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:12,560 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264456083] [2022-11-20 21:05:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264456083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:12,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:12,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854262446] [2022-11-20 21:05:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:12,561 INFO L87 Difference]: Start difference. First operand 3360 states and 13803 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:12,928 INFO L93 Difference]: Finished difference Result 3363 states and 13795 transitions. [2022-11-20 21:05:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:12,938 INFO L225 Difference]: With dead ends: 3363 [2022-11-20 21:05:12,938 INFO L226 Difference]: Without dead ends: 3363 [2022-11-20 21:05:12,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:12,939 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:12,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-20 21:05:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-11-20 21:05:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3357. [2022-11-20 21:05:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3357 states, 3251 states have (on average 4.240233774223316) internal successors, (13785), 3356 states have internal predecessors, (13785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 13785 transitions. [2022-11-20 21:05:12,998 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 13785 transitions. Word has length 11 [2022-11-20 21:05:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:12,998 INFO L495 AbstractCegarLoop]: Abstraction has 3357 states and 13785 transitions. [2022-11-20 21:05:12,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 13785 transitions. [2022-11-20 21:05:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:12,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:12,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:13,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (64)] Ended with exit code 0 [2022-11-20 21:05:13,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:13,203 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash 785704520, now seen corresponding path program 1 times [2022-11-20 21:05:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:13,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318951595] [2022-11-20 21:05:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:13,204 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 [2022-11-20 21:05:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:13,206 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:13,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (65)] Waiting until timeout for monitored process [2022-11-20 21:05:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:05:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:13,521 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:13,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:13,567 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 [2022-11-20 21:05:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:13,601 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 [2022-11-20 21:05:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:13,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:13,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:13,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318951595] [2022-11-20 21:05:13,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318951595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:13,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:13,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120740282] [2022-11-20 21:05:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:13,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:13,749 INFO L87 Difference]: Start difference. First operand 3357 states and 13785 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:14,201 INFO L93 Difference]: Finished difference Result 3362 states and 13799 transitions. [2022-11-20 21:05:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:14,211 INFO L225 Difference]: With dead ends: 3362 [2022-11-20 21:05:14,211 INFO L226 Difference]: Without dead ends: 3362 [2022-11-20 21:05:14,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:14,212 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:14,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-11-20 21:05:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2022-11-20 21:05:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 3361. [2022-11-20 21:05:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3255 states have (on average 4.2387096774193544) internal successors, (13797), 3360 states have internal predecessors, (13797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 13797 transitions. [2022-11-20 21:05:14,273 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 13797 transitions. Word has length 11 [2022-11-20 21:05:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:14,274 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 13797 transitions. [2022-11-20 21:05:14,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 13797 transitions. [2022-11-20 21:05:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:14,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:14,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:14,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (65)] Ended with exit code 0 [2022-11-20 21:05:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:14,483 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash 785703869, now seen corresponding path program 1 times [2022-11-20 21:05:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:14,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234914662] [2022-11-20 21:05:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:14,484 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 [2022-11-20 21:05:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:14,485 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:14,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (66)] Waiting until timeout for monitored process [2022-11-20 21:05:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:14,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:05:14,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:14,806 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:14,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:14,851 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 [2022-11-20 21:05:14,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:14,886 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 [2022-11-20 21:05:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:15,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:15,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:15,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234914662] [2022-11-20 21:05:15,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234914662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:15,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:15,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324244179] [2022-11-20 21:05:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:15,043 INFO L87 Difference]: Start difference. First operand 3361 states and 13797 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:15,416 INFO L93 Difference]: Finished difference Result 3357 states and 13774 transitions. [2022-11-20 21:05:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:15,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:15,449 INFO L225 Difference]: With dead ends: 3357 [2022-11-20 21:05:15,449 INFO L226 Difference]: Without dead ends: 3357 [2022-11-20 21:05:15,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:15,450 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:15,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-20 21:05:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-11-20 21:05:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3357. [2022-11-20 21:05:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3357 states, 3251 states have (on average 4.23685019993848) internal successors, (13774), 3356 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 13774 transitions. [2022-11-20 21:05:15,531 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 13774 transitions. Word has length 11 [2022-11-20 21:05:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:15,531 INFO L495 AbstractCegarLoop]: Abstraction has 3357 states and 13774 transitions. [2022-11-20 21:05:15,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 13774 transitions. [2022-11-20 21:05:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:15,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:15,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:15,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (66)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:15,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:15,745 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash 819874797, now seen corresponding path program 1 times [2022-11-20 21:05:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:15,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893199948] [2022-11-20 21:05:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:15,746 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 [2022-11-20 21:05:15,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:15,747 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:15,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (67)] Waiting until timeout for monitored process [2022-11-20 21:05:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:15,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:05:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:16,093 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:16,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:16,149 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 [2022-11-20 21:05:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:16,187 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 [2022-11-20 21:05:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:16,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:16,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:16,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893199948] [2022-11-20 21:05:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893199948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:16,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419678736] [2022-11-20 21:05:16,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:16,429 INFO L87 Difference]: Start difference. First operand 3357 states and 13774 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:16,833 INFO L93 Difference]: Finished difference Result 3373 states and 13798 transitions. [2022-11-20 21:05:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:16,850 INFO L225 Difference]: With dead ends: 3373 [2022-11-20 21:05:16,850 INFO L226 Difference]: Without dead ends: 3373 [2022-11-20 21:05:16,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:16,851 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:16,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-20 21:05:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2022-11-20 21:05:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3368. [2022-11-20 21:05:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3262 states have (on average 4.227774371551195) internal successors, (13791), 3367 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 13791 transitions. [2022-11-20 21:05:16,939 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 13791 transitions. Word has length 11 [2022-11-20 21:05:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:16,939 INFO L495 AbstractCegarLoop]: Abstraction has 3368 states and 13791 transitions. [2022-11-20 21:05:16,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 13791 transitions. [2022-11-20 21:05:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:16,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:16,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:16,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (67)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:17,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:17,152 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash 819874146, now seen corresponding path program 1 times [2022-11-20 21:05:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:17,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805274919] [2022-11-20 21:05:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:17,153 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 [2022-11-20 21:05:17,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:17,154 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:17,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (68)] Waiting until timeout for monitored process [2022-11-20 21:05:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:05:17,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:17,485 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:17,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:17,549 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 [2022-11-20 21:05:17,593 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:05:17,594 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 [2022-11-20 21:05:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:17,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:17,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805274919] [2022-11-20 21:05:17,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805274919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:17,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:17,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:05:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632346988] [2022-11-20 21:05:17,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:17,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:05:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:05:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:05:17,692 INFO L87 Difference]: Start difference. First operand 3368 states and 13791 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:18,044 INFO L93 Difference]: Finished difference Result 3370 states and 13797 transitions. [2022-11-20 21:05:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:18,057 INFO L225 Difference]: With dead ends: 3370 [2022-11-20 21:05:18,057 INFO L226 Difference]: Without dead ends: 3370 [2022-11-20 21:05:18,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:18,058 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:18,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-20 21:05:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2022-11-20 21:05:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 3366. [2022-11-20 21:05:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3260 states have (on average 4.230061349693251) internal successors, (13790), 3365 states have internal predecessors, (13790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 13790 transitions. [2022-11-20 21:05:18,120 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 13790 transitions. Word has length 11 [2022-11-20 21:05:18,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:18,121 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 13790 transitions. [2022-11-20 21:05:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 13790 transitions. [2022-11-20 21:05:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:18,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:18,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:18,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (68)] Ended with exit code 0 [2022-11-20 21:05:18,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:18,322 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash 813553525, now seen corresponding path program 1 times [2022-11-20 21:05:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:18,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42182095] [2022-11-20 21:05:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:18,323 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 [2022-11-20 21:05:18,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:18,324 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:18,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (69)] Waiting until timeout for monitored process [2022-11-20 21:05:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:18,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:05:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:18,658 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:18,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:18,707 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 [2022-11-20 21:05:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:18,739 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 [2022-11-20 21:05:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:18,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:18,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42182095] [2022-11-20 21:05:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42182095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:18,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:18,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:18,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530299237] [2022-11-20 21:05:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:18,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:18,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:18,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:18,883 INFO L87 Difference]: Start difference. First operand 3366 states and 13790 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:19,294 INFO L93 Difference]: Finished difference Result 3368 states and 13794 transitions. [2022-11-20 21:05:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:19,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:05:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:19,306 INFO L225 Difference]: With dead ends: 3368 [2022-11-20 21:05:19,306 INFO L226 Difference]: Without dead ends: 3368 [2022-11-20 21:05:19,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:19,307 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:19,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:05:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2022-11-20 21:05:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3367. [2022-11-20 21:05:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3367 states, 3261 states have (on average 4.229070837166513) internal successors, (13791), 3366 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 13791 transitions. [2022-11-20 21:05:19,394 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 13791 transitions. Word has length 11 [2022-11-20 21:05:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:19,394 INFO L495 AbstractCegarLoop]: Abstraction has 3367 states and 13791 transitions. [2022-11-20 21:05:19,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 13791 transitions. [2022-11-20 21:05:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:19,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:19,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:19,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (69)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:19,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:19,607 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash -492174103, now seen corresponding path program 1 times [2022-11-20 21:05:19,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:19,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167186770] [2022-11-20 21:05:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:19,608 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 [2022-11-20 21:05:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:19,609 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:19,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (70)] Waiting until timeout for monitored process [2022-11-20 21:05:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:05:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:20,045 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:05:20,046 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 [2022-11-20 21:05:20,187 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:05:20,187 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 [2022-11-20 21:05:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:20,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:20,351 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:20,351 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 [2022-11-20 21:05:20,409 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:05:20,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:05:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:22,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167186770] [2022-11-20 21:05:22,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167186770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054895042] [2022-11-20 21:05:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:22,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:05:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:05:22,074 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:05:22,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-20 21:05:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:05:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:22,660 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:05:22,661 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 [2022-11-20 21:05:22,805 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:05:22,805 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 [2022-11-20 21:05:23,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:23,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:23,021 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:23,022 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 [2022-11-20 21:05:23,063 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:05:23,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:05:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:23,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:26,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054895042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:26,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43700135] [2022-11-20 21:05:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:26,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:26,902 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:26,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 21:05:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:05:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:27,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:05:27,260 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 [2022-11-20 21:05:27,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:27,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:27,403 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:27,404 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 [2022-11-20 21:05:27,450 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:05:27,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:05:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:27,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:28,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:05:28,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 75 [2022-11-20 21:05:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43700135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:31,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:05:31,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 20 [2022-11-20 21:05:31,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231306808] [2022-11-20 21:05:31,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:31,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:05:31,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:05:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=377, Unknown=2, NotChecked=0, Total=462 [2022-11-20 21:05:31,164 INFO L87 Difference]: Start difference. First operand 3367 states and 13791 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:34,015 INFO L93 Difference]: Finished difference Result 4999 states and 18819 transitions. [2022-11-20 21:05:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:05:34,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:05:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:34,032 INFO L225 Difference]: With dead ends: 4999 [2022-11-20 21:05:34,032 INFO L226 Difference]: Without dead ends: 4999 [2022-11-20 21:05:34,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=123, Invalid=525, Unknown=2, NotChecked=0, Total=650 [2022-11-20 21:05:34,033 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:34,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 0 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 398 Invalid, 0 Unknown, 465 Unchecked, 2.3s Time] [2022-11-20 21:05:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2022-11-20 21:05:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 3447. [2022-11-20 21:05:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3341 states have (on average 4.218198144268183) internal successors, (14093), 3446 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 14093 transitions. [2022-11-20 21:05:34,194 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 14093 transitions. Word has length 11 [2022-11-20 21:05:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:34,195 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 14093 transitions. [2022-11-20 21:05:34,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 14093 transitions. [2022-11-20 21:05:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:34,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:34,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:34,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:34,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-20 21:05:34,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (70)] Ended with exit code 0 [2022-11-20 21:05:34,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:34,803 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1185868735, now seen corresponding path program 1 times [2022-11-20 21:05:34,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:34,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565005933] [2022-11-20 21:05:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:34,804 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 [2022-11-20 21:05:34,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:34,805 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:34,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (73)] Waiting until timeout for monitored process [2022-11-20 21:05:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:05:35,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:35,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:35,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565005933] [2022-11-20 21:05:35,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565005933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1976108556] [2022-11-20 21:05:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:35,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:05:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:05:35,351 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:05:35,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-20 21:05:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:05:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:35,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:36,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1976108556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:36,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908360802] [2022-11-20 21:05:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:36,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:36,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:36,241 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:36,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 21:05:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:36,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:05:36,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:36,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908360802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:36,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:05:36,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 21 [2022-11-20 21:05:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871732817] [2022-11-20 21:05:36,577 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:36,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:05:36,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:05:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:05:36,578 INFO L87 Difference]: Start difference. First operand 3447 states and 14093 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:49,248 INFO L93 Difference]: Finished difference Result 13672 states and 51616 transitions. [2022-11-20 21:05:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 21:05:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:05:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:49,295 INFO L225 Difference]: With dead ends: 13672 [2022-11-20 21:05:49,295 INFO L226 Difference]: Without dead ends: 13672 [2022-11-20 21:05:49,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=542, Invalid=2214, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 21:05:49,296 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 4259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:49,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 0 Invalid, 4315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 4259 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-11-20 21:05:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13672 states. [2022-11-20 21:05:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13672 to 4912. [2022-11-20 21:05:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4806 states have (on average 4.376820640865585) internal successors, (21035), 4911 states have internal predecessors, (21035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 21035 transitions. [2022-11-20 21:05:49,481 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 21035 transitions. Word has length 11 [2022-11-20 21:05:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:49,481 INFO L495 AbstractCegarLoop]: Abstraction has 4912 states and 21035 transitions. [2022-11-20 21:05:49,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 21035 transitions. [2022-11-20 21:05:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:05:49,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:49,482 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:49,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-20 21:05:49,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:49,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (73)] Ended with exit code 0 [2022-11-20 21:05:50,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:50,083 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1195700321, now seen corresponding path program 2 times [2022-11-20 21:05:50,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:50,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332527928] [2022-11-20 21:05:50,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:05:50,084 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 [2022-11-20 21:05:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:50,085 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:50,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (76)] Waiting until timeout for monitored process [2022-11-20 21:05:50,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:05:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:05:50,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:05:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:50,453 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:05:50,453 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 [2022-11-20 21:05:50,607 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:05:50,607 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 [2022-11-20 21:05:50,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:50,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:50,735 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:05:50,736 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 [2022-11-20 21:05:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:50,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:50,807 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:50,807 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 [2022-11-20 21:05:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:05:50,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:50,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332527928] [2022-11-20 21:05:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332527928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:50,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:50,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:05:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796886451] [2022-11-20 21:05:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:50,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:05:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:05:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:50,880 INFO L87 Difference]: Start difference. First operand 4912 states and 21035 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:51,728 INFO L93 Difference]: Finished difference Result 6141 states and 24972 transitions. [2022-11-20 21:05:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:51,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:05:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:51,747 INFO L225 Difference]: With dead ends: 6141 [2022-11-20 21:05:51,747 INFO L226 Difference]: Without dead ends: 6141 [2022-11-20 21:05:51,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:05:51,748 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:51,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:05:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2022-11-20 21:05:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 4083. [2022-11-20 21:05:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 3977 states have (on average 4.221775207442796) internal successors, (16790), 4082 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 16790 transitions. [2022-11-20 21:05:51,840 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 16790 transitions. Word has length 11 [2022-11-20 21:05:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:51,841 INFO L495 AbstractCegarLoop]: Abstraction has 4083 states and 16790 transitions. [2022-11-20 21:05:51,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 16790 transitions. [2022-11-20 21:05:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:51,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:51,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:51,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (76)] Ended with exit code 0 [2022-11-20 21:05:52,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:52,050 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash 296523743, now seen corresponding path program 1 times [2022-11-20 21:05:52,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:52,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194018127] [2022-11-20 21:05:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:52,051 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 [2022-11-20 21:05:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:52,051 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:52,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (77)] Waiting until timeout for monitored process [2022-11-20 21:05:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:05:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:52,363 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:52,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:52,409 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 [2022-11-20 21:05:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:52,440 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 [2022-11-20 21:05:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:52,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:52,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194018127] [2022-11-20 21:05:52,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194018127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:52,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:52,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:52,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450217543] [2022-11-20 21:05:52,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:52,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:52,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:52,593 INFO L87 Difference]: Start difference. First operand 4083 states and 16790 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:52,967 INFO L93 Difference]: Finished difference Result 4095 states and 16814 transitions. [2022-11-20 21:05:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 21:05:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:52,979 INFO L225 Difference]: With dead ends: 4095 [2022-11-20 21:05:52,979 INFO L226 Difference]: Without dead ends: 4095 [2022-11-20 21:05:52,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:52,980 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:52,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-20 21:05:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-11-20 21:05:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 4075. [2022-11-20 21:05:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3969 states have (on average 4.225497606449988) internal successors, (16771), 4074 states have internal predecessors, (16771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 16771 transitions. [2022-11-20 21:05:53,107 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 16771 transitions. Word has length 12 [2022-11-20 21:05:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:53,108 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 16771 transitions. [2022-11-20 21:05:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 16771 transitions. [2022-11-20 21:05:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:53,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:53,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:53,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (77)] Ended with exit code 0 [2022-11-20 21:05:53,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:53,309 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1331854757, now seen corresponding path program 1 times [2022-11-20 21:05:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:53,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888363936] [2022-11-20 21:05:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:53,310 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 [2022-11-20 21:05:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:53,311 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:53,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (78)] Waiting until timeout for monitored process [2022-11-20 21:05:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:05:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:53,641 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:53,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:53,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:53,689 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 [2022-11-20 21:05:53,731 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:05:53,731 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 [2022-11-20 21:05:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:53,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:53,832 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:53,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888363936] [2022-11-20 21:05:53,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888363936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:53,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:53,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:05:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209970877] [2022-11-20 21:05:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:05:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:05:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:05:53,833 INFO L87 Difference]: Start difference. First operand 4075 states and 16771 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-20 21:05:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:54,198 INFO L93 Difference]: Finished difference Result 4082 states and 16783 transitions. [2022-11-20 21:05:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 12 [2022-11-20 21:05:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:54,210 INFO L225 Difference]: With dead ends: 4082 [2022-11-20 21:05:54,210 INFO L226 Difference]: Without dead ends: 4082 [2022-11-20 21:05:54,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:54,211 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:54,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-20 21:05:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2022-11-20 21:05:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4073. [2022-11-20 21:05:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 3967 states have (on average 4.226367532140157) internal successors, (16766), 4072 states have internal predecessors, (16766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 16766 transitions. [2022-11-20 21:05:54,280 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 16766 transitions. Word has length 12 [2022-11-20 21:05:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:54,280 INFO L495 AbstractCegarLoop]: Abstraction has 4073 states and 16766 transitions. [2022-11-20 21:05:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-20 21:05:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 16766 transitions. [2022-11-20 21:05:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:54,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:54,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:54,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (78)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:54,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:54,482 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1331855408, now seen corresponding path program 1 times [2022-11-20 21:05:54,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:54,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88572938] [2022-11-20 21:05:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:54,483 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 [2022-11-20 21:05:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:54,483 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:54,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (79)] Waiting until timeout for monitored process [2022-11-20 21:05:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:05:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:54,828 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:54,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:54,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:54,874 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 [2022-11-20 21:05:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:54,908 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 [2022-11-20 21:05:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:55,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:55,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:55,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88572938] [2022-11-20 21:05:55,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88572938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:55,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:55,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:55,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825845267] [2022-11-20 21:05:55,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:55,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:55,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:55,067 INFO L87 Difference]: Start difference. First operand 4073 states and 16766 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:55,490 INFO L93 Difference]: Finished difference Result 4083 states and 16783 transitions. [2022-11-20 21:05:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 21:05:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:55,501 INFO L225 Difference]: With dead ends: 4083 [2022-11-20 21:05:55,501 INFO L226 Difference]: Without dead ends: 4083 [2022-11-20 21:05:55,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:55,502 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:55,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:05:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-11-20 21:05:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4063. [2022-11-20 21:05:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 3957 states have (on average 4.231741218094516) internal successors, (16745), 4062 states have internal predecessors, (16745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 16745 transitions. [2022-11-20 21:05:55,574 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 16745 transitions. Word has length 12 [2022-11-20 21:05:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:55,574 INFO L495 AbstractCegarLoop]: Abstraction has 4063 states and 16745 transitions. [2022-11-20 21:05:55,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 16745 transitions. [2022-11-20 21:05:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:55,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:55,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:55,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (79)] Ended with exit code 0 [2022-11-20 21:05:55,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:55,779 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1412981230, now seen corresponding path program 1 times [2022-11-20 21:05:55,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:55,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150483533] [2022-11-20 21:05:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:55,779 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 [2022-11-20 21:05:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:55,780 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:55,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (80)] Waiting until timeout for monitored process [2022-11-20 21:05:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:05:56,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:56,125 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:56,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:56,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:56,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:05:56,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:56,207 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 [2022-11-20 21:05:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:56,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:56,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150483533] [2022-11-20 21:05:56,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150483533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:56,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:56,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:56,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104593344] [2022-11-20 21:05:56,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:56,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:56,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:56,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:56,364 INFO L87 Difference]: Start difference. First operand 4063 states and 16745 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:56,774 INFO L93 Difference]: Finished difference Result 4078 states and 16784 transitions. [2022-11-20 21:05:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 21:05:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:56,786 INFO L225 Difference]: With dead ends: 4078 [2022-11-20 21:05:56,786 INFO L226 Difference]: Without dead ends: 4078 [2022-11-20 21:05:56,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:56,786 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:56,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:05:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2022-11-20 21:05:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 4064. [2022-11-20 21:05:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4064 states, 3958 states have (on average 4.231177362304194) internal successors, (16747), 4063 states have internal predecessors, (16747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 16747 transitions. [2022-11-20 21:05:56,855 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 16747 transitions. Word has length 12 [2022-11-20 21:05:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:56,856 INFO L495 AbstractCegarLoop]: Abstraction has 4064 states and 16747 transitions. [2022-11-20 21:05:56,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 16747 transitions. [2022-11-20 21:05:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:56,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:56,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:56,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (80)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:57,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:57,058 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash -353702643, now seen corresponding path program 1 times [2022-11-20 21:05:57,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:57,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060442465] [2022-11-20 21:05:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:57,059 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 [2022-11-20 21:05:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:57,060 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:57,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (81)] Waiting until timeout for monitored process [2022-11-20 21:05:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:05:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:57,407 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:05:57,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:05:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:57,454 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 [2022-11-20 21:05:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:57,486 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 [2022-11-20 21:05:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:57,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:57,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:57,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060442465] [2022-11-20 21:05:57,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060442465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:57,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:57,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028960383] [2022-11-20 21:05:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:57,673 INFO L87 Difference]: Start difference. First operand 4064 states and 16747 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:58,048 INFO L93 Difference]: Finished difference Result 4095 states and 16810 transitions. [2022-11-20 21:05:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 21:05:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:58,060 INFO L225 Difference]: With dead ends: 4095 [2022-11-20 21:05:58,060 INFO L226 Difference]: Without dead ends: 4095 [2022-11-20 21:05:58,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:58,060 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:58,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-20 21:05:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2022-11-20 21:05:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 4066. [2022-11-20 21:05:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 3960 states have (on average 4.230050505050505) internal successors, (16751), 4065 states have internal predecessors, (16751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 16751 transitions. [2022-11-20 21:05:58,131 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 16751 transitions. Word has length 12 [2022-11-20 21:05:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:58,131 INFO L495 AbstractCegarLoop]: Abstraction has 4066 states and 16751 transitions. [2022-11-20 21:05:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 21:05:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 16751 transitions. [2022-11-20 21:05:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:58,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:58,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:58,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (81)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:58,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:58,333 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1777401697, now seen corresponding path program 1 times [2022-11-20 21:05:58,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:58,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157310593] [2022-11-20 21:05:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:58,334 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 [2022-11-20 21:05:58,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:58,335 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:58,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (82)] Waiting until timeout for monitored process [2022-11-20 21:05:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:58,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:05:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:58,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:58,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157310593] [2022-11-20 21:05:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157310593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:58,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:58,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:05:58,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53133961] [2022-11-20 21:05:58,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:58,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:58,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:58,691 INFO L87 Difference]: Start difference. First operand 4066 states and 16751 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-11-20 21:05:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:59,593 INFO L93 Difference]: Finished difference Result 4375 states and 17392 transitions. [2022-11-20 21:05:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 12 [2022-11-20 21:05:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:59,605 INFO L225 Difference]: With dead ends: 4375 [2022-11-20 21:05:59,605 INFO L226 Difference]: Without dead ends: 4375 [2022-11-20 21:05:59,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:05:59,605 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:59,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 5 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:05:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2022-11-20 21:05:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 4017. [2022-11-20 21:05:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3911 states have (on average 4.183073382766556) internal successors, (16360), 4016 states have internal predecessors, (16360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 16360 transitions. [2022-11-20 21:05:59,675 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 16360 transitions. Word has length 12 [2022-11-20 21:05:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:59,676 INFO L495 AbstractCegarLoop]: Abstraction has 4017 states and 16360 transitions. [2022-11-20 21:05:59,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-11-20 21:05:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 16360 transitions. [2022-11-20 21:05:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:05:59,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:59,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:59,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (82)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:59,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:05:59,877 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:05:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:59,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1922476342, now seen corresponding path program 1 times [2022-11-20 21:05:59,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:59,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38625892] [2022-11-20 21:05:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:59,878 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 [2022-11-20 21:05:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:59,879 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:05:59,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (83)] Waiting until timeout for monitored process [2022-11-20 21:06:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:00,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:06:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:00,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:00,328 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 [2022-11-20 21:06:00,475 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:00,476 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 [2022-11-20 21:06:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:00,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:00,615 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:00,615 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 [2022-11-20 21:06:00,678 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:00,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:01,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:02,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38625892] [2022-11-20 21:06:02,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38625892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401151552] [2022-11-20 21:06:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:02,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:02,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:02,644 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:02,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-20 21:06:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:03,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:03,284 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 [2022-11-20 21:06:03,425 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:03,425 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 [2022-11-20 21:06:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:03,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:03,625 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:03,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:06:03,679 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:03,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:04,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:05,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401151552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120495047] [2022-11-20 21:06:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:05,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:05,921 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:05,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-20 21:06:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:06:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:06,315 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:06,315 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 [2022-11-20 21:06:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:06,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:06,463 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:06,463 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 [2022-11-20 21:06:06,519 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:06,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:06,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:07,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:06:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 75 [2022-11-20 21:06:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:10,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120495047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:10,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:06:10,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-20 21:06:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290461537] [2022-11-20 21:06:10,042 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:06:10,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 21:06:10,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 21:06:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-20 21:06:10,043 INFO L87 Difference]: Start difference. First operand 4017 states and 16360 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:15,251 INFO L93 Difference]: Finished difference Result 6613 states and 25311 transitions. [2022-11-20 21:06:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 21:06:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:06:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:15,270 INFO L225 Difference]: With dead ends: 6613 [2022-11-20 21:06:15,270 INFO L226 Difference]: Without dead ends: 6613 [2022-11-20 21:06:15,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=214, Invalid=777, Unknown=1, NotChecked=0, Total=992 [2022-11-20 21:06:15,271 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 322 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1136 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:15,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 0 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 817 Invalid, 0 Unknown, 1136 Unchecked, 3.8s Time] [2022-11-20 21:06:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2022-11-20 21:06:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4060. [2022-11-20 21:06:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 3954 states have (on average 4.178806272129489) internal successors, (16523), 4059 states have internal predecessors, (16523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16523 transitions. [2022-11-20 21:06:15,366 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16523 transitions. Word has length 12 [2022-11-20 21:06:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:15,366 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 16523 transitions. [2022-11-20 21:06:15,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16523 transitions. [2022-11-20 21:06:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:15,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:15,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:15,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (83)] Ended with exit code 0 [2022-11-20 21:06:15,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:15,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-20 21:06:15,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:15,968 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1922475090, now seen corresponding path program 1 times [2022-11-20 21:06:15,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567362765] [2022-11-20 21:06:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:15,969 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 [2022-11-20 21:06:15,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:15,970 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:15,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (86)] Waiting until timeout for monitored process [2022-11-20 21:06:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:06:16,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:16,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:16,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:16,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567362765] [2022-11-20 21:06:16,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567362765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:16,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:16,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:06:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026626362] [2022-11-20 21:06:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:06:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:06:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:16,316 INFO L87 Difference]: Start difference. First operand 4060 states and 16523 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:17,225 INFO L93 Difference]: Finished difference Result 6695 states and 25945 transitions. [2022-11-20 21:06:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:06:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-20 21:06:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:17,244 INFO L225 Difference]: With dead ends: 6695 [2022-11-20 21:06:17,244 INFO L226 Difference]: Without dead ends: 6695 [2022-11-20 21:06:17,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:06:17,244 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:17,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:06:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6695 states. [2022-11-20 21:06:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6695 to 4502. [2022-11-20 21:06:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4396 states have (on average 4.246132848043676) internal successors, (18666), 4501 states have internal predecessors, (18666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 18666 transitions. [2022-11-20 21:06:17,339 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 18666 transitions. Word has length 12 [2022-11-20 21:06:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:17,339 INFO L495 AbstractCegarLoop]: Abstraction has 4502 states and 18666 transitions. [2022-11-20 21:06:17,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 18666 transitions. [2022-11-20 21:06:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:17,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:17,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:17,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (86)] Ended with exit code 0 [2022-11-20 21:06:17,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:06:17,540 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1922475094, now seen corresponding path program 1 times [2022-11-20 21:06:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534385897] [2022-11-20 21:06:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:17,541 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 [2022-11-20 21:06:17,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:17,542 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:17,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (87)] Waiting until timeout for monitored process [2022-11-20 21:06:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:17,969 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:06:17,969 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 41 [2022-11-20 21:06:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:18,023 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 18 treesize of output 24 [2022-11-20 21:06:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:18,065 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 18 treesize of output 24 [2022-11-20 21:06:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:18,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:18,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534385897] [2022-11-20 21:06:18,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534385897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:18,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:18,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:06:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769705342] [2022-11-20 21:06:18,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:06:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:06:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:18,276 INFO L87 Difference]: Start difference. First operand 4502 states and 18666 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:18,753 INFO L93 Difference]: Finished difference Result 4498 states and 18646 transitions. [2022-11-20 21:06:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:06:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-20 21:06:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:18,766 INFO L225 Difference]: With dead ends: 4498 [2022-11-20 21:06:18,766 INFO L226 Difference]: Without dead ends: 4498 [2022-11-20 21:06:18,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:06:18,766 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:18,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-11-20 21:06:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2022-11-20 21:06:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4498. [2022-11-20 21:06:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4498 states, 4392 states have (on average 4.245446265938069) internal successors, (18646), 4497 states have internal predecessors, (18646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 18646 transitions. [2022-11-20 21:06:18,845 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 18646 transitions. Word has length 12 [2022-11-20 21:06:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:18,845 INFO L495 AbstractCegarLoop]: Abstraction has 4498 states and 18646 transitions. [2022-11-20 21:06:18,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 18646 transitions. [2022-11-20 21:06:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:18,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:18,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:18,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (87)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:19,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:06:19,047 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1922477489, now seen corresponding path program 1 times [2022-11-20 21:06:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065990135] [2022-11-20 21:06:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:19,048 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 [2022-11-20 21:06:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:19,049 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (88)] Waiting until timeout for monitored process [2022-11-20 21:06:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:19,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:06:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:19,572 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:19,573 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 [2022-11-20 21:06:19,715 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:19,716 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 [2022-11-20 21:06:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:19,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:19,851 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:19,851 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 [2022-11-20 21:06:19,919 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:19,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:20,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:21,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:21,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065990135] [2022-11-20 21:06:21,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065990135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [490790938] [2022-11-20 21:06:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:21,574 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:21,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:21,575 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:21,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-20 21:06:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:22,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:22,229 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:22,229 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 [2022-11-20 21:06:22,371 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:22,371 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 [2022-11-20 21:06:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:22,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:22,602 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:22,603 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 [2022-11-20 21:06:22,651 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:22,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:23,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:23,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [490790938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:23,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094280357] [2022-11-20 21:06:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:23,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:23,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:23,701 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:23,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-20 21:06:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:06:23,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:24,104 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:24,104 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 [2022-11-20 21:06:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:24,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:24,229 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:24,230 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 [2022-11-20 21:06:24,300 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:24,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:24,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:25,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:06:25,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 75 [2022-11-20 21:06:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:27,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094280357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:27,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:06:27,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 19 [2022-11-20 21:06:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100524564] [2022-11-20 21:06:27,825 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:06:27,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 21:06:27,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 21:06:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2022-11-20 21:06:27,826 INFO L87 Difference]: Start difference. First operand 4498 states and 18646 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:29,875 INFO L93 Difference]: Finished difference Result 5770 states and 22576 transitions. [2022-11-20 21:06:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:06:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:06:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:29,892 INFO L225 Difference]: With dead ends: 5770 [2022-11-20 21:06:29,892 INFO L226 Difference]: Without dead ends: 5770 [2022-11-20 21:06:29,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2022-11-20 21:06:29,893 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:29,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 302 Invalid, 0 Unknown, 397 Unchecked, 1.7s Time] [2022-11-20 21:06:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2022-11-20 21:06:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4503. [2022-11-20 21:06:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4397 states have (on average 4.244484876051853) internal successors, (18663), 4502 states have internal predecessors, (18663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 18663 transitions. [2022-11-20 21:06:30,001 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 18663 transitions. Word has length 12 [2022-11-20 21:06:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:30,001 INFO L495 AbstractCegarLoop]: Abstraction has 4503 states and 18663 transitions. [2022-11-20 21:06:30,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 18663 transitions. [2022-11-20 21:06:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:30,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:30,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:30,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (88)] Ended with exit code 0 [2022-11-20 21:06:30,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-20 21:06:30,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-20 21:06:30,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:30,603 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1922478512, now seen corresponding path program 1 times [2022-11-20 21:06:30,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:30,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336508883] [2022-11-20 21:06:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:30,604 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 [2022-11-20 21:06:30,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:30,605 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:30,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (91)] Waiting until timeout for monitored process [2022-11-20 21:06:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 21:06:30,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:31,100 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:31,100 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 [2022-11-20 21:06:31,255 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:31,255 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 [2022-11-20 21:06:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:31,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:31,400 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:31,400 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 [2022-11-20 21:06:31,460 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:31,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:31,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:33,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:33,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336508883] [2022-11-20 21:06:33,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336508883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527002008] [2022-11-20 21:06:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:33,452 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:33,453 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:33,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-20 21:06:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:33,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:34,133 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:34,133 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 [2022-11-20 21:06:34,285 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:34,285 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 [2022-11-20 21:06:34,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:34,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:34,516 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:34,516 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 [2022-11-20 21:06:34,567 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:34,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:34,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527002008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028423510] [2022-11-20 21:06:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:38,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:38,176 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:38,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-20 21:06:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:06:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:38,649 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:38,649 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 [2022-11-20 21:06:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:38,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:38,777 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:38,777 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 [2022-11-20 21:06:38,836 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:38,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:39,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:40,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:06:40,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 81 [2022-11-20 21:06:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028423510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:43,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:06:43,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 22 [2022-11-20 21:06:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989026775] [2022-11-20 21:06:43,532 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:06:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 21:06:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 21:06:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=451, Unknown=2, NotChecked=0, Total=552 [2022-11-20 21:06:43,533 INFO L87 Difference]: Start difference. First operand 4503 states and 18663 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:47,465 INFO L93 Difference]: Finished difference Result 5803 states and 22360 transitions. [2022-11-20 21:06:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:06:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:06:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:47,482 INFO L225 Difference]: With dead ends: 5803 [2022-11-20 21:06:47,482 INFO L226 Difference]: Without dead ends: 5803 [2022-11-20 21:06:47,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=157, Invalid=653, Unknown=2, NotChecked=0, Total=812 [2022-11-20 21:06:47,482 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 368 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1426 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:47,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 0 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 554 Invalid, 0 Unknown, 1426 Unchecked, 3.3s Time] [2022-11-20 21:06:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5803 states. [2022-11-20 21:06:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5803 to 4466. [2022-11-20 21:06:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 4360 states have (on average 4.245871559633027) internal successors, (18512), 4465 states have internal predecessors, (18512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 18512 transitions. [2022-11-20 21:06:47,573 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 18512 transitions. Word has length 12 [2022-11-20 21:06:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:47,573 INFO L495 AbstractCegarLoop]: Abstraction has 4466 states and 18512 transitions. [2022-11-20 21:06:47,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 18512 transitions. [2022-11-20 21:06:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:47,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:47,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:47,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-20 21:06:47,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (91)] Ended with exit code 0 [2022-11-20 21:06:47,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-20 21:06:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:48,175 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1892818028, now seen corresponding path program 1 times [2022-11-20 21:06:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894963463] [2022-11-20 21:06:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:48,176 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 [2022-11-20 21:06:48,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:48,177 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:48,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (94)] Waiting until timeout for monitored process [2022-11-20 21:06:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:06:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:48,617 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:06:48,617 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 41 [2022-11-20 21:06:48,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:48,667 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 18 treesize of output 24 [2022-11-20 21:06:48,737 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:06:48,737 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 18 treesize of output 28 [2022-11-20 21:06:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:48,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:48,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894963463] [2022-11-20 21:06:48,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894963463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:48,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:48,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:06:48,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067326777] [2022-11-20 21:06:48,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:48,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:06:48,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:06:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:48,929 INFO L87 Difference]: Start difference. First operand 4466 states and 18512 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:49,289 INFO L93 Difference]: Finished difference Result 4470 states and 18528 transitions. [2022-11-20 21:06:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:06:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-20 21:06:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:49,303 INFO L225 Difference]: With dead ends: 4470 [2022-11-20 21:06:49,303 INFO L226 Difference]: Without dead ends: 4470 [2022-11-20 21:06:49,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:49,304 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:49,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-11-20 21:06:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4470 states. [2022-11-20 21:06:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 4470. [2022-11-20 21:06:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4470 states, 4364 states have (on average 4.245646196150321) internal successors, (18528), 4469 states have internal predecessors, (18528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4470 states to 4470 states and 18528 transitions. [2022-11-20 21:06:49,383 INFO L78 Accepts]: Start accepts. Automaton has 4470 states and 18528 transitions. Word has length 12 [2022-11-20 21:06:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:49,383 INFO L495 AbstractCegarLoop]: Abstraction has 4470 states and 18528 transitions. [2022-11-20 21:06:49,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4470 states and 18528 transitions. [2022-11-20 21:06:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:49,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:49,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:49,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (94)] Ended with exit code 0 [2022-11-20 21:06:49,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:06:49,585 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1885754678, now seen corresponding path program 2 times [2022-11-20 21:06:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:49,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697605461] [2022-11-20 21:06:49,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:06:49,586 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 [2022-11-20 21:06:49,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:49,587 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:49,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (95)] Waiting until timeout for monitored process [2022-11-20 21:06:49,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:06:49,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:06:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:06:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:49,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:49,992 INFO L321 Elim1Store]: treesize reduction 72, result has 30.8 percent of original size [2022-11-20 21:06:49,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 46 [2022-11-20 21:06:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:50,041 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 [2022-11-20 21:06:50,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:50,096 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 [2022-11-20 21:06:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:50,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:50,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:50,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697605461] [2022-11-20 21:06:50,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697605461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:50,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:50,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:06:50,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574146938] [2022-11-20 21:06:50,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:06:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:06:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:50,345 INFO L87 Difference]: Start difference. First operand 4470 states and 18528 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:50,869 INFO L93 Difference]: Finished difference Result 4476 states and 18556 transitions. [2022-11-20 21:06:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:06:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-20 21:06:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:50,882 INFO L225 Difference]: With dead ends: 4476 [2022-11-20 21:06:50,882 INFO L226 Difference]: Without dead ends: 4476 [2022-11-20 21:06:50,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:06:50,883 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:50,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2022-11-20 21:06:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2022-11-20 21:06:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4468. [2022-11-20 21:06:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4362 states have (on average 4.246217331499312) internal successors, (18522), 4467 states have internal predecessors, (18522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 18522 transitions. [2022-11-20 21:06:50,963 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 18522 transitions. Word has length 12 [2022-11-20 21:06:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:50,963 INFO L495 AbstractCegarLoop]: Abstraction has 4468 states and 18522 transitions. [2022-11-20 21:06:50,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 18522 transitions. [2022-11-20 21:06:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:50,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:50,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:50,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (95)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:51,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:06:51,165 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:51,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1885790018, now seen corresponding path program 3 times [2022-11-20 21:06:51,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:51,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687426440] [2022-11-20 21:06:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:06:51,165 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 [2022-11-20 21:06:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:51,166 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:51,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (96)] Waiting until timeout for monitored process [2022-11-20 21:06:51,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:06:51,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:06:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:06:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:51,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:51,570 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-20 21:06:51,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-20 21:06:51,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:51,635 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 [2022-11-20 21:06:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:51,690 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 [2022-11-20 21:06:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:51,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:51,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687426440] [2022-11-20 21:06:51,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687426440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:51,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:51,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:06:51,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311634367] [2022-11-20 21:06:51,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:51,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:06:51,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:06:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:51,973 INFO L87 Difference]: Start difference. First operand 4468 states and 18522 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:52,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:52,498 INFO L93 Difference]: Finished difference Result 4468 states and 18518 transitions. [2022-11-20 21:06:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:06:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2022-11-20 21:06:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:52,512 INFO L225 Difference]: With dead ends: 4468 [2022-11-20 21:06:52,512 INFO L226 Difference]: Without dead ends: 4468 [2022-11-20 21:06:52,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:06:52,513 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:52,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2022-11-20 21:06:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2022-11-20 21:06:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 4464. [2022-11-20 21:06:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4464 states, 4358 states have (on average 4.245525470399266) internal successors, (18502), 4463 states have internal predecessors, (18502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 18502 transitions. [2022-11-20 21:06:52,592 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 18502 transitions. Word has length 12 [2022-11-20 21:06:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:52,592 INFO L495 AbstractCegarLoop]: Abstraction has 4464 states and 18502 transitions. [2022-11-20 21:06:52,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:06:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 18502 transitions. [2022-11-20 21:06:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:06:52,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:52,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:52,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (96)] Ended with exit code 0 [2022-11-20 21:06:52,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:06:52,794 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:06:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1790191872, now seen corresponding path program 1 times [2022-11-20 21:06:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587438090] [2022-11-20 21:06:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:52,794 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 [2022-11-20 21:06:52,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:52,795 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:06:52,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (97)] Waiting until timeout for monitored process [2022-11-20 21:06:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:06:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:53,329 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:53,329 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 [2022-11-20 21:06:53,531 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:53,531 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 [2022-11-20 21:06:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:53,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:53,658 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:53,659 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 [2022-11-20 21:06:53,744 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:53,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:54,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:55,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:55,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587438090] [2022-11-20 21:06:55,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587438090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:55,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2054991043] [2022-11-20 21:06:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:55,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:55,560 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-20 21:06:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:56,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:56,261 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:06:56,261 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 [2022-11-20 21:06:56,408 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:06:56,408 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 [2022-11-20 21:06:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:56,618 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:56,619 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 [2022-11-20 21:06:56,689 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:56,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:06:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:57,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2054991043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981830925] [2022-11-20 21:07:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:01,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:07:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:07:01,377 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:07:01,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-20 21:07:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:07:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:01,819 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:07:01,819 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 17 treesize of output 44 [2022-11-20 21:07:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:07:01,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:07:01,955 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:07:01,955 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 [2022-11-20 21:07:02,017 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:07:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:07:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:02,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:02,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:07:02,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 75 [2022-11-20 21:07:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:05,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981830925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:05,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:07:05,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 20 [2022-11-20 21:07:05,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326007611] [2022-11-20 21:07:05,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:07:05,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:07:05,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:07:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=377, Unknown=2, NotChecked=0, Total=462 [2022-11-20 21:07:05,316 INFO L87 Difference]: Start difference. First operand 4464 states and 18502 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:07,680 INFO L93 Difference]: Finished difference Result 7023 states and 27386 transitions. [2022-11-20 21:07:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 21:07:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:07:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:07,702 INFO L225 Difference]: With dead ends: 7023 [2022-11-20 21:07:07,702 INFO L226 Difference]: Without dead ends: 7023 [2022-11-20 21:07:07,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=134, Invalid=566, Unknown=2, NotChecked=0, Total=702 [2022-11-20 21:07:07,703 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 221 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 851 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:07,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 0 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 426 Invalid, 0 Unknown, 851 Unchecked, 1.7s Time] [2022-11-20 21:07:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7023 states. [2022-11-20 21:07:07,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7023 to 4873. [2022-11-20 21:07:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4767 states have (on average 4.275854835326201) internal successors, (20383), 4872 states have internal predecessors, (20383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 20383 transitions. [2022-11-20 21:07:07,805 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 20383 transitions. Word has length 12 [2022-11-20 21:07:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:07,805 INFO L495 AbstractCegarLoop]: Abstraction has 4873 states and 20383 transitions. [2022-11-20 21:07:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 20383 transitions. [2022-11-20 21:07:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:07:07,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:07,806 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 21:07:07,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-20 21:07:08,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2022-11-20 21:07:08,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (97)] Ended with exit code 0 [2022-11-20 21:07:08,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:07:08,407 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:07:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1717420970, now seen corresponding path program 3 times [2022-11-20 21:07:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:08,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449398314] [2022-11-20 21:07:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:07:08,408 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 [2022-11-20 21:07:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:08,410 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:07:08,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (100)] Waiting until timeout for monitored process [2022-11-20 21:07:08,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 21:07:08,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:07:08,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:07:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:08,915 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:07:08,915 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 [2022-11-20 21:07:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:09,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:12,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449398314] [2022-11-20 21:07:12,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449398314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172616182] [2022-11-20 21:07:12,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:07:12,574 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:07:12,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:07:12,574 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:07:12,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-20 21:07:13,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 21:07:13,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:07:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:07:13,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:13,783 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:07:13,783 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 [2022-11-20 21:07:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:13,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:14,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [172616182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:14,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787463459] [2022-11-20 21:07:14,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:07:14,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:07:14,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:07:14,396 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:07:14,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-20 21:07:16,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 21:07:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:07:16,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:07:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:16,227 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:07:16,227 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 [2022-11-20 21:07:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:16,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787463459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:20,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:07:20,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-20 21:07:20,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135671159] [2022-11-20 21:07:20,727 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:07:20,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 21:07:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 21:07:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 21:07:20,728 INFO L87 Difference]: Start difference. First operand 4873 states and 20383 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:33,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:35,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:37,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:39,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:41,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:43,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:45,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:47,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:49,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:51,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:53,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:55,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:57,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:59,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:01,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:03,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:05,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:11,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:13,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:15,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:17,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:19,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:21,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:23,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:25,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:27,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:29,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:31,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:33,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:35,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:37,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:39,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:41,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:43,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:09:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:01,578 INFO L93 Difference]: Finished difference Result 47033 states and 199674 transitions. [2022-11-20 21:09:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 21:09:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:09:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:01,951 INFO L225 Difference]: With dead ends: 47033 [2022-11-20 21:09:01,951 INFO L226 Difference]: Without dead ends: 47033 [2022-11-20 21:09:01,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 21:09:01,951 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3785 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7104 mSolverCounterSat, 437 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3785 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 7104 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:01,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3785 Valid, 0 Invalid, 7575 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [437 Valid, 7104 Invalid, 34 Unknown, 0 Unchecked, 86.1s Time] [2022-11-20 21:09:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47033 states. [2022-11-20 21:09:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47033 to 4899. [2022-11-20 21:09:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4899 states, 4793 states have (on average 4.263509284373044) internal successors, (20435), 4898 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4899 states to 4899 states and 20435 transitions. [2022-11-20 21:09:02,333 INFO L78 Accepts]: Start accepts. Automaton has 4899 states and 20435 transitions. Word has length 12 [2022-11-20 21:09:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:02,334 INFO L495 AbstractCegarLoop]: Abstraction has 4899 states and 20435 transitions. [2022-11-20 21:09:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4899 states and 20435 transitions. [2022-11-20 21:09:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:02,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:02,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:02,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-20 21:09:02,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (100)] Ended with exit code 0 [2022-11-20 21:09:02,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:02,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:02,936 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1662157919, now seen corresponding path program 1 times [2022-11-20 21:09:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:02,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649414515] [2022-11-20 21:09:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:02,937 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 [2022-11-20 21:09:02,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:02,938 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:02,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (103)] Waiting until timeout for monitored process [2022-11-20 21:09:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:03,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:09:03,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:03,404 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:09:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:09:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:03,458 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 [2022-11-20 21:09:03,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:03,496 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 [2022-11-20 21:09:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:03,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:03,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:03,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649414515] [2022-11-20 21:09:03,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649414515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:03,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:03,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:03,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636447369] [2022-11-20 21:09:03,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:03,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:03,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:03,687 INFO L87 Difference]: Start difference. First operand 4899 states and 20435 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 21:09:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:04,055 INFO L93 Difference]: Finished difference Result 4922 states and 20489 transitions. [2022-11-20 21:09:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 21:09:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:04,069 INFO L225 Difference]: With dead ends: 4922 [2022-11-20 21:09:04,070 INFO L226 Difference]: Without dead ends: 4922 [2022-11-20 21:09:04,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:04,070 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:04,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-20 21:09:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4922 states. [2022-11-20 21:09:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4922 to 4874. [2022-11-20 21:09:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4768 states have (on average 4.273489932885906) internal successors, (20376), 4873 states have internal predecessors, (20376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 20376 transitions. [2022-11-20 21:09:04,159 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 20376 transitions. Word has length 13 [2022-11-20 21:09:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:04,159 INFO L495 AbstractCegarLoop]: Abstraction has 4874 states and 20376 transitions. [2022-11-20 21:09:04,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 21:09:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 20376 transitions. [2022-11-20 21:09:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:04,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:04,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:04,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (103)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:04,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:09:04,362 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 598973780, now seen corresponding path program 1 times [2022-11-20 21:09:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:04,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346351785] [2022-11-20 21:09:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:04,362 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 [2022-11-20 21:09:04,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:04,363 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:04,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (104)] Waiting until timeout for monitored process [2022-11-20 21:09:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:09:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:04,804 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 21:09:04,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 21:09:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:04,852 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 [2022-11-20 21:09:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:04,897 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 [2022-11-20 21:09:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:05,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:05,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:05,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346351785] [2022-11-20 21:09:05,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346351785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:05,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:05,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338726073] [2022-11-20 21:09:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:05,058 INFO L87 Difference]: Start difference. First operand 4874 states and 20376 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 21:09:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:05,520 INFO L93 Difference]: Finished difference Result 4898 states and 20425 transitions. [2022-11-20 21:09:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 21:09:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:05,535 INFO L225 Difference]: With dead ends: 4898 [2022-11-20 21:09:05,535 INFO L226 Difference]: Without dead ends: 4898 [2022-11-20 21:09:05,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:05,536 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:05,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-20 21:09:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2022-11-20 21:09:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4856. [2022-11-20 21:09:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4750 states have (on average 4.281894736842105) internal successors, (20339), 4855 states have internal predecessors, (20339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 20339 transitions. [2022-11-20 21:09:05,626 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 20339 transitions. Word has length 13 [2022-11-20 21:09:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:05,626 INFO L495 AbstractCegarLoop]: Abstraction has 4856 states and 20339 transitions. [2022-11-20 21:09:05,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 21:09:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 20339 transitions. [2022-11-20 21:09:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:05,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:05,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:05,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (104)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:05,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:09:05,828 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1382120753, now seen corresponding path program 1 times [2022-11-20 21:09:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663617751] [2022-11-20 21:09:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:05,828 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 [2022-11-20 21:09:05,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:05,829 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:05,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (105)] Waiting until timeout for monitored process [2022-11-20 21:09:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:09:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:06,220 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 [2022-11-20 21:09:06,226 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 [2022-11-20 21:09:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:06,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:09:06,326 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:09:06,326 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 [2022-11-20 21:09:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:09,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663617751] [2022-11-20 21:09:09,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663617751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [934950858] [2022-11-20 21:09:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:09,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:09,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:09:09,072 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:09:09,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-20 21:09:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:09:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:09,679 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 [2022-11-20 21:09:09,687 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 [2022-11-20 21:09:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:09,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:09:09,840 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:09:09,840 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 [2022-11-20 21:09:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:09,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:10,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [934950858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:10,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902163687] [2022-11-20 21:09:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:10,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:10,242 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:10,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-20 21:09:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:10,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:09:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:10,572 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 [2022-11-20 21:09:10,752 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:09:10,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:09:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:11,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:16,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902163687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:16,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:09:16,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-20 21:09:16,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501342147] [2022-11-20 21:09:16,245 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:09:16,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:09:16,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:09:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=308, Unknown=2, NotChecked=0, Total=380 [2022-11-20 21:09:16,246 INFO L87 Difference]: Start difference. First operand 4856 states and 20339 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:21,837 INFO L93 Difference]: Finished difference Result 8096 states and 35960 transitions. [2022-11-20 21:09:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:09:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:09:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:21,863 INFO L225 Difference]: With dead ends: 8096 [2022-11-20 21:09:21,863 INFO L226 Difference]: Without dead ends: 8096 [2022-11-20 21:09:21,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=137, Invalid=563, Unknown=2, NotChecked=0, Total=702 [2022-11-20 21:09:21,864 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 189 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:21,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 0 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 463 Invalid, 0 Unknown, 1046 Unchecked, 2.5s Time] [2022-11-20 21:09:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2022-11-20 21:09:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 5717. [2022-11-20 21:09:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5611 states have (on average 4.429513455711994) internal successors, (24854), 5716 states have internal predecessors, (24854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 24854 transitions. [2022-11-20 21:09:21,989 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 24854 transitions. Word has length 13 [2022-11-20 21:09:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:21,989 INFO L495 AbstractCegarLoop]: Abstraction has 5717 states and 24854 transitions. [2022-11-20 21:09:21,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 24854 transitions. [2022-11-20 21:09:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:21,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:21,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:22,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (105)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:22,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-20 21:09:22,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-11-20 21:09:22,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:22,591 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1382120836, now seen corresponding path program 1 times [2022-11-20 21:09:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:22,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774462385] [2022-11-20 21:09:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:22,592 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 [2022-11-20 21:09:22,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:22,593 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:22,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (108)] Waiting until timeout for monitored process [2022-11-20 21:09:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:09:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:23,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:23,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 21:09:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:23,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774462385] [2022-11-20 21:09:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774462385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666022939] [2022-11-20 21:09:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:23,332 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:23,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:09:23,333 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:09:23,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-11-20 21:09:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:09:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:23,886 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 [2022-11-20 21:09:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:24,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:24,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1666022939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:24,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852025426] [2022-11-20 21:09:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:24,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:24,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:24,547 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:24,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-20 21:09:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:09:24,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:24,884 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 [2022-11-20 21:09:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:25,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:25,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852025426] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:25,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-20 21:09:25,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5, 5, 5] total 20 [2022-11-20 21:09:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732382846] [2022-11-20 21:09:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:09:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:09:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-20 21:09:25,447 INFO L87 Difference]: Start difference. First operand 5717 states and 24854 transitions. Second operand has 6 states, 5 states have (on average 2.6) 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) [2022-11-20 21:09:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:27,769 INFO L93 Difference]: Finished difference Result 7633 states and 32453 transitions. [2022-11-20 21:09:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:09:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) 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 [2022-11-20 21:09:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:27,793 INFO L225 Difference]: With dead ends: 7633 [2022-11-20 21:09:27,793 INFO L226 Difference]: Without dead ends: 7633 [2022-11-20 21:09:27,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:09:27,794 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:27,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 21:09:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2022-11-20 21:09:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6292. [2022-11-20 21:09:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 6186 states have (on average 4.535887487875849) internal successors, (28059), 6291 states have internal predecessors, (28059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 28059 transitions. [2022-11-20 21:09:27,929 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 28059 transitions. Word has length 13 [2022-11-20 21:09:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:27,929 INFO L495 AbstractCegarLoop]: Abstraction has 6292 states and 28059 transitions. [2022-11-20 21:09:27,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) 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) [2022-11-20 21:09:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 28059 transitions. [2022-11-20 21:09:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:27,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:27,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:27,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (109)] Ended with exit code 0 [2022-11-20 21:09:28,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (108)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:28,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:28,531 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1396000299, now seen corresponding path program 1 times [2022-11-20 21:09:28,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:28,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982108500] [2022-11-20 21:09:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:28,532 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 [2022-11-20 21:09:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:28,533 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:28,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (111)] Waiting until timeout for monitored process [2022-11-20 21:09:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:29,017 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:09:29,017 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 41 [2022-11-20 21:09:29,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:29,073 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 18 treesize of output 24 [2022-11-20 21:09:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:29,117 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 18 treesize of output 24 [2022-11-20 21:09:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:29,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:29,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:29,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982108500] [2022-11-20 21:09:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982108500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:29,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:29,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609447713] [2022-11-20 21:09:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:29,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:09:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:09:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:29,339 INFO L87 Difference]: Start difference. First operand 6292 states and 28059 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:09:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:29,854 INFO L93 Difference]: Finished difference Result 6298 states and 28086 transitions. [2022-11-20 21:09:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:09:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-20 21:09:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:29,875 INFO L225 Difference]: With dead ends: 6298 [2022-11-20 21:09:29,875 INFO L226 Difference]: Without dead ends: 6298 [2022-11-20 21:09:29,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:09:29,875 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:29,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-11-20 21:09:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2022-11-20 21:09:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 6298. [2022-11-20 21:09:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6192 states have (on average 4.535852713178294) internal successors, (28086), 6297 states have internal predecessors, (28086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 28086 transitions. [2022-11-20 21:09:30,066 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 28086 transitions. Word has length 13 [2022-11-20 21:09:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:30,066 INFO L495 AbstractCegarLoop]: Abstraction has 6298 states and 28086 transitions. [2022-11-20 21:09:30,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:09:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 28086 transitions. [2022-11-20 21:09:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:30,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:30,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:30,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (111)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:30,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:09:30,268 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash -336721712, now seen corresponding path program 1 times [2022-11-20 21:09:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706221878] [2022-11-20 21:09:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:30,270 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 [2022-11-20 21:09:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:30,270 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:30,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (112)] Waiting until timeout for monitored process [2022-11-20 21:09:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:30,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:09:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:30,783 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:09:30,783 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 41 [2022-11-20 21:09:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:30,836 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 18 treesize of output 24 [2022-11-20 21:09:30,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:30,880 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 18 treesize of output 24 [2022-11-20 21:09:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:31,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:31,104 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:31,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706221878] [2022-11-20 21:09:31,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706221878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:31,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:31,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:31,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737569122] [2022-11-20 21:09:31,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:31,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:09:31,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:31,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:09:31,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:31,105 INFO L87 Difference]: Start difference. First operand 6298 states and 28086 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:09:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:31,622 INFO L93 Difference]: Finished difference Result 6348 states and 28195 transitions. [2022-11-20 21:09:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:09:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-20 21:09:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:31,642 INFO L225 Difference]: With dead ends: 6348 [2022-11-20 21:09:31,642 INFO L226 Difference]: Without dead ends: 6348 [2022-11-20 21:09:31,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:09:31,642 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:31,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-11-20 21:09:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2022-11-20 21:09:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6333. [2022-11-20 21:09:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6333 states, 6227 states have (on average 4.522563031957604) internal successors, (28162), 6332 states have internal predecessors, (28162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 28162 transitions. [2022-11-20 21:09:31,762 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 28162 transitions. Word has length 13 [2022-11-20 21:09:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:31,762 INFO L495 AbstractCegarLoop]: Abstraction has 6333 states and 28162 transitions. [2022-11-20 21:09:31,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:09:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 28162 transitions. [2022-11-20 21:09:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:31,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:31,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:31,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (112)] Ended with exit code 0 [2022-11-20 21:09:31,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:09:31,968 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash -532815219, now seen corresponding path program 2 times [2022-11-20 21:09:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:31,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237026349] [2022-11-20 21:09:31,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:09:31,969 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 [2022-11-20 21:09:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:31,970 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:31,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (113)] Waiting until timeout for monitored process [2022-11-20 21:09:32,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:09:32,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:09:32,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:32,390 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:09:32,390 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 41 [2022-11-20 21:09:32,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:32,447 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 18 treesize of output 24 [2022-11-20 21:09:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:09:32,491 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 18 treesize of output 24 [2022-11-20 21:09:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:32,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:32,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:32,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237026349] [2022-11-20 21:09:32,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237026349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:32,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:32,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:32,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704864418] [2022-11-20 21:09:32,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:32,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:09:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:09:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:32,711 INFO L87 Difference]: Start difference. First operand 6333 states and 28162 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:09:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:33,238 INFO L93 Difference]: Finished difference Result 6330 states and 28145 transitions. [2022-11-20 21:09:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:09:33,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-20 21:09:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:33,264 INFO L225 Difference]: With dead ends: 6330 [2022-11-20 21:09:33,264 INFO L226 Difference]: Without dead ends: 6330 [2022-11-20 21:09:33,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:09:33,265 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:33,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-11-20 21:09:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6330 states. [2022-11-20 21:09:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6330 to 6324. [2022-11-20 21:09:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6218 states have (on average 4.522032807976841) internal successors, (28118), 6323 states have internal predecessors, (28118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 28118 transitions. [2022-11-20 21:09:33,396 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 28118 transitions. Word has length 13 [2022-11-20 21:09:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:33,396 INFO L495 AbstractCegarLoop]: Abstraction has 6324 states and 28118 transitions. [2022-11-20 21:09:33,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:09:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 28118 transitions. [2022-11-20 21:09:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:09:33,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:33,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:33,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (113)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:33,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:09:33,598 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:09:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash -532812856, now seen corresponding path program 1 times [2022-11-20 21:09:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:33,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121121266] [2022-11-20 21:09:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:33,599 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 [2022-11-20 21:09:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:33,600 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:09:33,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (114)] Waiting until timeout for monitored process [2022-11-20 21:09:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:33,945 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 [2022-11-20 21:09:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:34,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:34,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:34,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121121266] [2022-11-20 21:09:34,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121121266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:34,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1011430855] [2022-11-20 21:09:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:34,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:09:34,814 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:09:34,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-20 21:09:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:35,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:09:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:35,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:35,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1011430855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765069719] [2022-11-20 21:09:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:35,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:35,962 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:35,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-20 21:09:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:09:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:36,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:37,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765069719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:37,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:09:37,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 31 [2022-11-20 21:09:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560179779] [2022-11-20 21:09:37,183 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:09:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 21:09:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 21:09:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-11-20 21:09:37,184 INFO L87 Difference]: Start difference. First operand 6324 states and 28118 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:59,952 INFO L93 Difference]: Finished difference Result 24162 states and 97853 transitions. [2022-11-20 21:09:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 21:09:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2022-11-20 21:09:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:00,048 INFO L225 Difference]: With dead ends: 24162 [2022-11-20 21:10:00,048 INFO L226 Difference]: Without dead ends: 24162 [2022-11-20 21:10:00,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1194, Invalid=5286, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 21:10:00,049 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3437 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4679 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 4679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:00,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 0 Invalid, 4765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 4679 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2022-11-20 21:10:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24162 states. [2022-11-20 21:10:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24162 to 10053. [2022-11-20 21:10:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10053 states, 9947 states have (on average 4.841057605308133) internal successors, (48154), 10052 states have internal predecessors, (48154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10053 states to 10053 states and 48154 transitions. [2022-11-20 21:10:00,409 INFO L78 Accepts]: Start accepts. Automaton has 10053 states and 48154 transitions. Word has length 13 [2022-11-20 21:10:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:00,409 INFO L495 AbstractCegarLoop]: Abstraction has 10053 states and 48154 transitions. [2022-11-20 21:10:00,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 10053 states and 48154 transitions. [2022-11-20 21:10:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:00,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:00,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:00,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-11-20 21:10:00,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (114)] Ended with exit code 0 [2022-11-20 21:10:00,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (115)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:01,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:10:01,011 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash -532812739, now seen corresponding path program 1 times [2022-11-20 21:10:01,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974415498] [2022-11-20 21:10:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:01,012 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 [2022-11-20 21:10:01,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:01,013 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:01,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (117)] Waiting until timeout for monitored process [2022-11-20 21:10:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:10:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:01,576 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:10:01,576 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 41 [2022-11-20 21:10:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:01,632 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 18 treesize of output 24 [2022-11-20 21:10:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:01,677 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 18 treesize of output 24 [2022-11-20 21:10:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:10:01,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:01,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974415498] [2022-11-20 21:10:01,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974415498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:01,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:01,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:10:01,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313936330] [2022-11-20 21:10:01,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:01,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:10:01,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:01,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:10:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:01,903 INFO L87 Difference]: Start difference. First operand 10053 states and 48154 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:10:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:02,434 INFO L93 Difference]: Finished difference Result 10028 states and 48007 transitions. [2022-11-20 21:10:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:10:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-20 21:10:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:02,473 INFO L225 Difference]: With dead ends: 10028 [2022-11-20 21:10:02,473 INFO L226 Difference]: Without dead ends: 10028 [2022-11-20 21:10:02,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:10:02,474 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:02,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-11-20 21:10:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10028 states. [2022-11-20 21:10:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10028 to 10028. [2022-11-20 21:10:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 9922 states have (on average 4.838439830679299) internal successors, (48007), 10027 states have internal predecessors, (48007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 48007 transitions. [2022-11-20 21:10:02,821 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 48007 transitions. Word has length 13 [2022-11-20 21:10:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:02,821 INFO L495 AbstractCegarLoop]: Abstraction has 10028 states and 48007 transitions. [2022-11-20 21:10:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:10:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 48007 transitions. [2022-11-20 21:10:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:02,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:02,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:02,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (117)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:03,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:10:03,023 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:03,023 INFO L85 PathProgramCache]: Analyzing trace with hash -532814072, now seen corresponding path program 2 times [2022-11-20 21:10:03,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:03,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601495837] [2022-11-20 21:10:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:03,024 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 [2022-11-20 21:10:03,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:03,025 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:03,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (118)] Waiting until timeout for monitored process [2022-11-20 21:10:03,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:10:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:10:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:03,468 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:10:03,469 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 41 [2022-11-20 21:10:03,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:03,526 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 18 treesize of output 24 [2022-11-20 21:10:03,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:03,572 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 18 treesize of output 24 [2022-11-20 21:10:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:10:03,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:03,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601495837] [2022-11-20 21:10:03,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601495837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:03,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:03,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:10:03,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152780697] [2022-11-20 21:10:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:03,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:10:03,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:10:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:03,810 INFO L87 Difference]: Start difference. First operand 10028 states and 48007 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:10:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:04,394 INFO L93 Difference]: Finished difference Result 10033 states and 48022 transitions. [2022-11-20 21:10:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:10:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-20 21:10:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:04,434 INFO L225 Difference]: With dead ends: 10033 [2022-11-20 21:10:04,434 INFO L226 Difference]: Without dead ends: 10033 [2022-11-20 21:10:04,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:10:04,434 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:04,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-11-20 21:10:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10033 states. [2022-11-20 21:10:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10033 to 10028. [2022-11-20 21:10:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 9922 states have (on average 4.838439830679299) internal successors, (48007), 10027 states have internal predecessors, (48007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 48007 transitions. [2022-11-20 21:10:04,650 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 48007 transitions. Word has length 13 [2022-11-20 21:10:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:04,650 INFO L495 AbstractCegarLoop]: Abstraction has 10028 states and 48007 transitions. [2022-11-20 21:10:04,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:10:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 48007 transitions. [2022-11-20 21:10:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:04,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:04,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:04,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (118)] Ended with exit code 0 [2022-11-20 21:10:04,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:10:04,853 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash -532816397, now seen corresponding path program 1 times [2022-11-20 21:10:04,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:04,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725781756] [2022-11-20 21:10:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:04,854 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 [2022-11-20 21:10:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:04,855 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:04,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (119)] Waiting until timeout for monitored process [2022-11-20 21:10:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:10:05,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:05,370 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-20 21:10:05,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-20 21:10:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:05,430 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 [2022-11-20 21:10:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:05,474 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 [2022-11-20 21:10:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:10:05,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:05,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725781756] [2022-11-20 21:10:05,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725781756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:05,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:05,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:10:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110755152] [2022-11-20 21:10:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:10:05,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:10:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:05,762 INFO L87 Difference]: Start difference. First operand 10028 states and 48007 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:10:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:06,299 INFO L93 Difference]: Finished difference Result 10024 states and 47989 transitions. [2022-11-20 21:10:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:10:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-20 21:10:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:06,335 INFO L225 Difference]: With dead ends: 10024 [2022-11-20 21:10:06,335 INFO L226 Difference]: Without dead ends: 10024 [2022-11-20 21:10:06,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:10:06,335 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:06,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-11-20 21:10:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10024 states. [2022-11-20 21:10:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10024 to 10024. [2022-11-20 21:10:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 9918 states have (on average 4.838576325872151) internal successors, (47989), 10023 states have internal predecessors, (47989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 47989 transitions. [2022-11-20 21:10:06,542 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 47989 transitions. Word has length 13 [2022-11-20 21:10:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:06,542 INFO L495 AbstractCegarLoop]: Abstraction has 10024 states and 47989 transitions. [2022-11-20 21:10:06,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-20 21:10:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 47989 transitions. [2022-11-20 21:10:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:06,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:06,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:06,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (119)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:06,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:10:06,744 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1453787281, now seen corresponding path program 1 times [2022-11-20 21:10:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:06,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142083464] [2022-11-20 21:10:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:06,745 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 [2022-11-20 21:10:06,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:06,746 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:06,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (120)] Waiting until timeout for monitored process [2022-11-20 21:10:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:10:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:07,263 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 21:10:07,263 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 15 treesize of output 41 [2022-11-20 21:10:07,308 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:10:07,308 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 18 treesize of output 28 [2022-11-20 21:10:07,361 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:10:07,361 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 21 treesize of output 31 [2022-11-20 21:10:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:10:07,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:07,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142083464] [2022-11-20 21:10:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142083464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:07,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:07,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:10:07,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962007390] [2022-11-20 21:10:07,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:07,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:10:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:10:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:10:07,551 INFO L87 Difference]: Start difference. First operand 10024 states and 47989 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) [2022-11-20 21:10:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:07,937 INFO L93 Difference]: Finished difference Result 9609 states and 46215 transitions. [2022-11-20 21:10:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:07,938 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 [2022-11-20 21:10:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:07,970 INFO L225 Difference]: With dead ends: 9609 [2022-11-20 21:10:07,970 INFO L226 Difference]: Without dead ends: 9609 [2022-11-20 21:10:07,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:10:07,970 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:07,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:10:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2022-11-20 21:10:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 9510. [2022-11-20 21:10:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9432 states have (on average 4.8764843087362175) internal successors, (45995), 9509 states have internal predecessors, (45995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 45995 transitions. [2022-11-20 21:10:08,246 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 45995 transitions. Word has length 13 [2022-11-20 21:10:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:08,246 INFO L495 AbstractCegarLoop]: Abstraction has 9510 states and 45995 transitions. [2022-11-20 21:10:08,246 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) [2022-11-20 21:10:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 45995 transitions. [2022-11-20 21:10:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:08,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:08,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:08,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (120)] Ended with exit code 0 [2022-11-20 21:10:08,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:10:08,448 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1451403812, now seen corresponding path program 1 times [2022-11-20 21:10:08,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:08,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120353516] [2022-11-20 21:10:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:08,450 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 [2022-11-20 21:10:08,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:08,450 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:08,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (121)] Waiting until timeout for monitored process [2022-11-20 21:10:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:08,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:10:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:10:08,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:08,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:08,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120353516] [2022-11-20 21:10:08,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120353516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:08,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:08,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:10:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023756223] [2022-11-20 21:10:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:08,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:10:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:10:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:08,864 INFO L87 Difference]: Start difference. First operand 9510 states and 45995 transitions. Second operand has 6 states, 5 states have (on average 2.6) 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) [2022-11-20 21:10:09,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:09,988 INFO L93 Difference]: Finished difference Result 13814 states and 64876 transitions. [2022-11-20 21:10:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:10:09,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) 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 [2022-11-20 21:10:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:10,039 INFO L225 Difference]: With dead ends: 13814 [2022-11-20 21:10:10,039 INFO L226 Difference]: Without dead ends: 13814 [2022-11-20 21:10:10,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 21:10:10,039 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 165 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:10,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 0 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 21:10:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13814 states. [2022-11-20 21:10:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13814 to 9382. [2022-11-20 21:10:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9382 states, 9304 states have (on average 4.877579535683577) internal successors, (45381), 9381 states have internal predecessors, (45381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9382 states to 9382 states and 45381 transitions. [2022-11-20 21:10:10,271 INFO L78 Accepts]: Start accepts. Automaton has 9382 states and 45381 transitions. Word has length 13 [2022-11-20 21:10:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:10,272 INFO L495 AbstractCegarLoop]: Abstraction has 9382 states and 45381 transitions. [2022-11-20 21:10:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) 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) [2022-11-20 21:10:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 9382 states and 45381 transitions. [2022-11-20 21:10:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:10,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:10,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:10,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (121)] Ended with exit code 0 [2022-11-20 21:10:10,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:10:10,474 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2007207336, now seen corresponding path program 2 times [2022-11-20 21:10:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:10,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058584375] [2022-11-20 21:10:10,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:10,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:10:10,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:10,475 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:10,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (122)] Waiting until timeout for monitored process [2022-11-20 21:10:10,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:10:10,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:10,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:10:10,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:10,948 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:10:10,949 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 [2022-11-20 21:10:11,098 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:10:11,098 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 [2022-11-20 21:10:11,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:11,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:10:11,215 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:10:11,216 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 [2022-11-20 21:10:11,282 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:10:11,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:10:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:10:11,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:11,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058584375] [2022-11-20 21:10:11,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058584375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:11,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:11,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:10:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378437116] [2022-11-20 21:10:11,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:11,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:10:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:10:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:11,582 INFO L87 Difference]: Start difference. First operand 9382 states and 45381 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:12,079 INFO L93 Difference]: Finished difference Result 9381 states and 45371 transitions. [2022-11-20 21:10:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:10:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 21:10:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:12,111 INFO L225 Difference]: With dead ends: 9381 [2022-11-20 21:10:12,111 INFO L226 Difference]: Without dead ends: 9381 [2022-11-20 21:10:12,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:10:12,112 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:12,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-11-20 21:10:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9381 states. [2022-11-20 21:10:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9381 to 9376. [2022-11-20 21:10:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9298 states have (on average 4.877070337707034) internal successors, (45347), 9375 states have internal predecessors, (45347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 45347 transitions. [2022-11-20 21:10:12,304 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 45347 transitions. Word has length 13 [2022-11-20 21:10:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:12,304 INFO L495 AbstractCegarLoop]: Abstraction has 9376 states and 45347 transitions. [2022-11-20 21:10:12,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 45347 transitions. [2022-11-20 21:10:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:10:12,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:12,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:12,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (122)] Ended with exit code 0 [2022-11-20 21:10:12,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:10:12,506 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:10:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash -95163081, now seen corresponding path program 2 times [2022-11-20 21:10:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:12,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944756860] [2022-11-20 21:10:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:12,507 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 [2022-11-20 21:10:12,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:12,508 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:10:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (123)] Waiting until timeout for monitored process [2022-11-20 21:10:12,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:10:12,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:12,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:10:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:13,026 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 21:10:13,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 21:10:13,160 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:10:13,160 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 21:10:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:13,269 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 [2022-11-20 21:10:13,283 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:10:13,283 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 [2022-11-20 21:10:13,345 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:10:13,346 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 [2022-11-20 21:10:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:10:13,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:10:16,650 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_~get1~0.offset)) (.cse2 (bvadd (_ bv8 32) c_~get1~0.offset))) (and (forall ((|v_ULTIMATE.start_create_fresh_int_array_~size#1_281| (_ BitVec 32))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_298| (_ BitVec 32))) (let ((.cse1 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_298| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_281|)) c_~get1~0.base))) (or (not (bvule .cse0 .cse1)) (bvule .cse2 .cse1)))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_281|) (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_281| (_ bv1073741823 32))))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_298| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~size#1_281| (_ BitVec 32))) (or (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_281|) (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_281| (_ bv1073741823 32))) (not (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_298| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_281|)) c_~get1~0.base))))) (bvule .cse0 .cse2)))) is different from false [2022-11-20 21:10:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:10:22,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:22,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944756860] [2022-11-20 21:10:22,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944756860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:10:22,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809879702] [2022-11-20 21:10:22,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:22,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:10:22,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:10:22,395 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:10:22,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-20 21:10:23,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:10:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:10:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:23,299 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:10:23,299 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 [2022-11-20 21:10:23,461 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:10:23,461 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 [2022-11-20 21:10:23,926 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:10:23,927 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 [2022-11-20 21:10:23,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:10:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:24,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:10:24,118 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:10:24,119 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 [2022-11-20 21:10:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:10:24,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:10:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:10:32,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809879702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:10:32,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275424717] [2022-11-20 21:10:32,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:32,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:10:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:10:32,193 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:10:32,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-20 21:10:32,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:10:32,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:10:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:32,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:10:32,750 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 [2022-11-20 21:10:32,907 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:10:32,907 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 [2022-11-20 21:10:33,179 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 21:10:33,179 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 [2022-11-20 21:10:33,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:10:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:10:33,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:10:33,363 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:10:33,363 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 [2022-11-20 21:10:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:10:33,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:10:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:10:52,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275424717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:10:52,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:10:52,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7, 7, 7, 8] total 35 [2022-11-20 21:10:52,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667297107] [2022-11-20 21:10:52,822 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:10:52,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 21:10:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 21:10:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1086, Unknown=7, NotChecked=68, Total=1332 [2022-11-20 21:10:52,823 INFO L87 Difference]: Start difference. First operand 9376 states and 45347 transitions. Second operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:11:12,683 WARN L233 SmtUtils]: Spent 12.17s on a formula simplification. DAG size of input: 102 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:11:38,236 WARN L233 SmtUtils]: Spent 18.13s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:11:55,034 WARN L233 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 97 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:12:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:12:07,288 INFO L93 Difference]: Finished difference Result 29160 states and 144247 transitions. [2022-11-20 21:12:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 21:12:07,290 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2022-11-20 21:12:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:12:07,416 INFO L225 Difference]: With dead ends: 29160 [2022-11-20 21:12:07,416 INFO L226 Difference]: Without dead ends: 29160 [2022-11-20 21:12:07,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 101.0s TimeCoverageRelationStatistics Valid=359, Invalid=2387, Unknown=14, NotChecked=102, Total=2862 [2022-11-20 21:12:07,417 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 585 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3568 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:12:07,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 0 Invalid, 4670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1095 Invalid, 0 Unknown, 3568 Unchecked, 8.2s Time] [2022-11-20 21:12:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2022-11-20 21:12:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 10665. [2022-11-20 21:12:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10665 states, 10587 states have (on average 5.023236044205158) internal successors, (53181), 10664 states have internal predecessors, (53181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:12:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 53181 transitions. [2022-11-20 21:12:07,821 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 53181 transitions. Word has length 13 [2022-11-20 21:12:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:12:07,821 INFO L495 AbstractCegarLoop]: Abstraction has 10665 states and 53181 transitions. [2022-11-20 21:12:07,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:12:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 53181 transitions. [2022-11-20 21:12:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:12:07,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:07,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:12:07,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (124)] Ended with exit code 0 [2022-11-20 21:12:08,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-20 21:12:08,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (123)] Ended with exit code 0 [2022-11-20 21:12:08,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:12:08,425 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:12:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash -95162871, now seen corresponding path program 1 times [2022-11-20 21:12:08,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:12:08,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776657090] [2022-11-20 21:12:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:08,425 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 [2022-11-20 21:12:08,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:12:08,426 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:12:08,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (126)] Waiting until timeout for monitored process [2022-11-20 21:12:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:12:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:12:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:12:08,927 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 [2022-11-20 21:12:08,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:12:09,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,122 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 21 treesize of output 21 [2022-11-20 21:12:09,138 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:12:09,138 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 [2022-11-20 21:12:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:12:09,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:12:10,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:12:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776657090] [2022-11-20 21:12:10,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776657090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1758054714] [2022-11-20 21:12:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:12:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:12:10,795 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:12:10,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-20 21:12:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:12:11,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:12:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:12:11,603 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 [2022-11-20 21:12:11,614 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 [2022-11-20 21:12:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:12,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:12:12,045 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:12:12,045 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 [2022-11-20 21:12:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:12:12,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:12:15,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1758054714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:15,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078756302] [2022-11-20 21:12:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:15,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:15,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:12:15,319 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:12:15,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-20 21:12:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:12:15,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 21:12:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:12:15,792 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 [2022-11-20 21:12:16,199 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:12:16,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:12:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:12:17,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:26,726 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:12:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:12:36,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078756302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:36,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:12:36,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 8] total 32 [2022-11-20 21:12:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612053419] [2022-11-20 21:12:36,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:12:36,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 21:12:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:12:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 21:12:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=907, Unknown=3, NotChecked=0, Total=1056 [2022-11-20 21:12:36,304 INFO L87 Difference]: Start difference. First operand 10665 states and 53181 transitions. Second operand has 33 states, 32 states have (on average 1.5625) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:13:41,614 WARN L233 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 63 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:14:06,349 WARN L233 SmtUtils]: Spent 23.56s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:14:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:14:20,810 INFO L93 Difference]: Finished difference Result 26258 states and 124831 transitions. [2022-11-20 21:14:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 21:14:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.5625) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2022-11-20 21:14:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:14:20,918 INFO L225 Difference]: With dead ends: 26258 [2022-11-20 21:14:20,918 INFO L226 Difference]: Without dead ends: 26258 [2022-11-20 21:14:20,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 115.6s TimeCoverageRelationStatistics Valid=393, Invalid=2360, Unknown=3, NotChecked=0, Total=2756 [2022-11-20 21:14:20,919 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 757 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3568 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:14:20,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 0 Invalid, 5578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1975 Invalid, 0 Unknown, 3568 Unchecked, 12.6s Time] [2022-11-20 21:14:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26258 states. [2022-11-20 21:14:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26258 to 12814. [2022-11-20 21:14:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12814 states, 12746 states have (on average 5.244625764945865) internal successors, (66848), 12813 states have internal predecessors, (66848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12814 states to 12814 states and 66848 transitions. [2022-11-20 21:14:21,373 INFO L78 Accepts]: Start accepts. Automaton has 12814 states and 66848 transitions. Word has length 13 [2022-11-20 21:14:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:14:21,373 INFO L495 AbstractCegarLoop]: Abstraction has 12814 states and 66848 transitions. [2022-11-20 21:14:21,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.5625) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12814 states and 66848 transitions. [2022-11-20 21:14:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:14:21,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:14:21,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:14:21,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-20 21:14:21,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (126)] Ended with exit code 0 [2022-11-20 21:14:21,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (127)] Forceful destruction successful, exit code 0 [2022-11-20 21:14:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:14:21,976 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:14:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:14:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash -103924078, now seen corresponding path program 1 times [2022-11-20 21:14:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:14:21,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803549520] [2022-11-20 21:14:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:14:21,977 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 [2022-11-20 21:14:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:14:21,978 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:14:21,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (129)] Waiting until timeout for monitored process [2022-11-20 21:14:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:14:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:14:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:14:22,552 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 [2022-11-20 21:14:22,562 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 [2022-11-20 21:14:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:14:22,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:14:22,717 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:14:22,717 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 [2022-11-20 21:14:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:22,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:14:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:27,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:14:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803549520] [2022-11-20 21:14:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803549520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:14:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044120698] [2022-11-20 21:14:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:14:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:14:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:14:27,775 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:14:27,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2022-11-20 21:14:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:14:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:14:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:14:28,500 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 [2022-11-20 21:14:28,510 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 [2022-11-20 21:14:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:14:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:14:28,706 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:14:28,706 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 [2022-11-20 21:14:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:28,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:14:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:29,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2044120698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:14:29,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607597931] [2022-11-20 21:14:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:14:29,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:14:29,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:14:29,222 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:14:29,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-20 21:14:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:14:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:14:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:14:29,608 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 [2022-11-20 21:14:29,828 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:14:29,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:14:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:14:30,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:14:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:14:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607597931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:14:33,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:14:33,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-20 21:14:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477039766] [2022-11-20 21:14:33,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:14:33,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:14:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:14:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:14:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2022-11-20 21:14:33,803 INFO L87 Difference]: Start difference. First operand 12814 states and 66848 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:14:42,986 INFO L93 Difference]: Finished difference Result 18391 states and 89136 transitions. [2022-11-20 21:14:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:14:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:14:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:14:43,056 INFO L225 Difference]: With dead ends: 18391 [2022-11-20 21:14:43,057 INFO L226 Difference]: Without dead ends: 18391 [2022-11-20 21:14:43,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=168, Invalid=587, Unknown=1, NotChecked=0, Total=756 [2022-11-20 21:14:43,057 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 540 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1327 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:14:43,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1 Invalid, 2196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 854 Invalid, 0 Unknown, 1327 Unchecked, 5.0s Time] [2022-11-20 21:14:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18391 states. [2022-11-20 21:14:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18391 to 13399. [2022-11-20 21:14:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13399 states, 13331 states have (on average 5.2154377015977795) internal successors, (69527), 13398 states have internal predecessors, (69527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13399 states to 13399 states and 69527 transitions. [2022-11-20 21:14:43,460 INFO L78 Accepts]: Start accepts. Automaton has 13399 states and 69527 transitions. Word has length 14 [2022-11-20 21:14:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:14:43,460 INFO L495 AbstractCegarLoop]: Abstraction has 13399 states and 69527 transitions. [2022-11-20 21:14:43,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 13399 states and 69527 transitions. [2022-11-20 21:14:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:14:43,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:14:43,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:14:43,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (129)] Forceful destruction successful, exit code 0 [2022-11-20 21:14:43,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-20 21:14:43,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (130)] Forceful destruction successful, exit code 0 [2022-11-20 21:14:44,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:14:44,063 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:14:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:14:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -103922435, now seen corresponding path program 1 times [2022-11-20 21:14:44,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:14:44,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142310102] [2022-11-20 21:14:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:14:44,064 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 [2022-11-20 21:14:44,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:14:44,065 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:14:44,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (132)] Waiting until timeout for monitored process [2022-11-20 21:14:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:14:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:14:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:14:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:44,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:14:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:44,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:14:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142310102] [2022-11-20 21:14:44,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142310102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:14:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [380280863] [2022-11-20 21:14:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:14:44,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:14:44,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:14:44,937 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:14:44,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-20 21:14:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:14:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:14:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:14:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:45,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:14:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:46,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [380280863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:14:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225562215] [2022-11-20 21:14:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:14:46,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:14:46,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:14:46,392 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:14:46,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-20 21:14:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:14:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:14:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:14:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:46,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:14:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:14:46,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225562215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:14:46,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:14:46,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 21 [2022-11-20 21:14:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108429134] [2022-11-20 21:14:46,963 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:14:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:14:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:14:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:14:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:14:46,963 INFO L87 Difference]: Start difference. First operand 13399 states and 69527 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:14:59,338 INFO L93 Difference]: Finished difference Result 21993 states and 99034 transitions. [2022-11-20 21:14:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 21:14:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:14:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:14:59,422 INFO L225 Difference]: With dead ends: 21993 [2022-11-20 21:14:59,423 INFO L226 Difference]: Without dead ends: 21993 [2022-11-20 21:14:59,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=462, Invalid=1890, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 21:14:59,423 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1378 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:14:59,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 65 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2945 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-20 21:14:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21993 states. [2022-11-20 21:14:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21993 to 14738. [2022-11-20 21:14:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 14670 states have (on average 5.067143830947512) internal successors, (74335), 14737 states have internal predecessors, (74335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 74335 transitions. [2022-11-20 21:14:59,873 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 74335 transitions. Word has length 14 [2022-11-20 21:14:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:14:59,874 INFO L495 AbstractCegarLoop]: Abstraction has 14738 states and 74335 transitions. [2022-11-20 21:14:59,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:14:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 74335 transitions. [2022-11-20 21:14:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:14:59,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:14:59,876 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:14:59,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (132)] Ended with exit code 0 [2022-11-20 21:15:00,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:00,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:00,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:15:00,477 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:15:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash -852428303, now seen corresponding path program 2 times [2022-11-20 21:15:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:00,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733904255] [2022-11-20 21:15:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:15:00,478 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 [2022-11-20 21:15:00,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:00,478 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:15:00,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (135)] Waiting until timeout for monitored process [2022-11-20 21:15:00,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:15:00,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:15:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:01,030 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:15:01,030 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 [2022-11-20 21:15:01,241 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:15:01,241 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 [2022-11-20 21:15:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:15:01,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:15:01,352 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:15:01,353 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 [2022-11-20 21:15:01,430 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:15:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:15:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:15:01,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:01,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:15:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733904255] [2022-11-20 21:15:01,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733904255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:01,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:01,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:15:01,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126044046] [2022-11-20 21:15:01,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:01,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:15:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:01,901 INFO L87 Difference]: Start difference. First operand 14738 states and 74335 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:15:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:02,536 INFO L93 Difference]: Finished difference Result 14761 states and 74395 transitions. [2022-11-20 21:15:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:15:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 14 [2022-11-20 21:15:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:02,596 INFO L225 Difference]: With dead ends: 14761 [2022-11-20 21:15:02,596 INFO L226 Difference]: Without dead ends: 14761 [2022-11-20 21:15:02,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:02,597 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:02,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-11-20 21:15:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14761 states. [2022-11-20 21:15:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14761 to 14742. [2022-11-20 21:15:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14742 states, 14674 states have (on average 5.066580346190541) internal successors, (74347), 14741 states have internal predecessors, (74347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14742 states to 14742 states and 74347 transitions. [2022-11-20 21:15:03,038 INFO L78 Accepts]: Start accepts. Automaton has 14742 states and 74347 transitions. Word has length 14 [2022-11-20 21:15:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:03,038 INFO L495 AbstractCegarLoop]: Abstraction has 14742 states and 74347 transitions. [2022-11-20 21:15:03,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:15:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14742 states and 74347 transitions. [2022-11-20 21:15:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:15:03,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:03,041 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:03,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (135)] Ended with exit code 0 [2022-11-20 21:15:03,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:15:03,242 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:15:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash -852427280, now seen corresponding path program 2 times [2022-11-20 21:15:03,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:03,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246432389] [2022-11-20 21:15:03,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:15:03,243 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 [2022-11-20 21:15:03,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:03,244 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:15:03,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (136)] Waiting until timeout for monitored process [2022-11-20 21:15:03,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:15:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:03,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 21:15:03,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:03,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 21:15:03,827 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 [2022-11-20 21:15:04,034 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:15:04,034 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 15 treesize of output 50 [2022-11-20 21:15:04,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:15:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:15:04,160 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:15:04,160 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 [2022-11-20 21:15:04,241 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:15:04,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 21:15:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:15:04,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:04,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:15:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246432389] [2022-11-20 21:15:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246432389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:04,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:04,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:15:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171888659] [2022-11-20 21:15:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:04,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:15:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:04,715 INFO L87 Difference]: Start difference. First operand 14742 states and 74347 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:15:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:05,384 INFO L93 Difference]: Finished difference Result 14777 states and 74507 transitions. [2022-11-20 21:15:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:15:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 14 [2022-11-20 21:15:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:05,447 INFO L225 Difference]: With dead ends: 14777 [2022-11-20 21:15:05,448 INFO L226 Difference]: Without dead ends: 14777 [2022-11-20 21:15:05,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:05,448 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:05,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-11-20 21:15:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14777 states. [2022-11-20 21:15:05,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14777 to 14753. [2022-11-20 21:15:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14753 states, 14685 states have (on average 5.066530473272047) internal successors, (74402), 14752 states have internal predecessors, (74402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14753 states to 14753 states and 74402 transitions. [2022-11-20 21:15:05,845 INFO L78 Accepts]: Start accepts. Automaton has 14753 states and 74402 transitions. Word has length 14 [2022-11-20 21:15:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:05,845 INFO L495 AbstractCegarLoop]: Abstraction has 14753 states and 74402 transitions. [2022-11-20 21:15:05,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-20 21:15:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 14753 states and 74402 transitions. [2022-11-20 21:15:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:15:05,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:05,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:05,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (136)] Ended with exit code 0 [2022-11-20 21:15:06,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:15:06,048 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:15:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 826316690, now seen corresponding path program 1 times [2022-11-20 21:15:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117651754] [2022-11-20 21:15:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:06,049 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 [2022-11-20 21:15:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:06,050 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:15:06,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (137)] Waiting until timeout for monitored process [2022-11-20 21:15:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:15:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:15:06,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:06,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:15:06,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117651754] [2022-11-20 21:15:06,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117651754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:06,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:06,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:15:06,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357076110] [2022-11-20 21:15:06,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:06,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:15:06,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:15:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:15:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:15:06,580 INFO L87 Difference]: Start difference. First operand 14753 states and 74402 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:08,665 INFO L93 Difference]: Finished difference Result 22207 states and 103985 transitions. [2022-11-20 21:15:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:15:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-20 21:15:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:08,761 INFO L225 Difference]: With dead ends: 22207 [2022-11-20 21:15:08,762 INFO L226 Difference]: Without dead ends: 22207 [2022-11-20 21:15:08,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:15:08,762 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 216 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:08,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 0 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 21:15:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22207 states. [2022-11-20 21:15:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22207 to 14211. [2022-11-20 21:15:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14211 states, 14143 states have (on average 5.013292795022273) internal successors, (70903), 14210 states have internal predecessors, (70903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14211 states to 14211 states and 70903 transitions. [2022-11-20 21:15:09,183 INFO L78 Accepts]: Start accepts. Automaton has 14211 states and 70903 transitions. Word has length 14 [2022-11-20 21:15:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:09,184 INFO L495 AbstractCegarLoop]: Abstraction has 14211 states and 70903 transitions. [2022-11-20 21:15:09,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 14211 states and 70903 transitions. [2022-11-20 21:15:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:15:09,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:09,186 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:09,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (137)] Ended with exit code 0 [2022-11-20 21:15:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 21:15:09,387 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-20 21:15:09,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash -287235089, now seen corresponding path program 1 times [2022-11-20 21:15:09,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:09,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6434574] [2022-11-20 21:15:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:09,388 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 [2022-11-20 21:15:09,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:09,389 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 21:15:09,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e8e3a2b-cfbf-4f6b-9f8b-4876bda37220/bin/utaipan-6cKwYrpEi9/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 (138)] Waiting until timeout for monitored process