./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS --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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --- 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-8393723 [2022-11-19 07:34:34,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:34,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:34,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:34,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:34,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:34,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:34,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:34,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:34,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:34,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:34,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:34,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:34,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:34,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:34,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:34,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:34,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:34,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:34,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:34,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:34,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:34,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:34,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:34,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:34,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:34,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:34,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:34,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:34,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:34,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:34,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:34,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:34,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:34,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:34,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:34,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:34,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:34,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:34,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:34,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:34,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:34:34,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:34,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:34,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:34,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:34,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:34,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:34,721 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:34,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:34,722 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:34,722 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:34:34,722 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:34,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:34,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:34:34,723 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:34:34,723 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:34,723 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:34:34,724 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:34:34,724 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:34:34,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:34:34,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:34:34,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:34,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:34:34,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:34:34,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:34,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:34:34,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:34,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:34:34,727 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:34:34,727 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:34:34,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:34,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:34:34,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:34:34,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:34,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:34,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:34,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:34,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:34,729 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:34:34,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:34,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:34:34,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:34:34,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:34,730 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_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f [2022-11-19 07:34:35,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:35,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:35,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:35,050 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:35,051 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:35,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-11-19 07:34:35,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/bfb8e1b2d/2cfbddb702734e93bac2421180fc418e/FLAG979853334 [2022-11-19 07:34:35,559 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:35,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-11-19 07:34:35,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/bfb8e1b2d/2cfbddb702734e93bac2421180fc418e/FLAG979853334 [2022-11-19 07:34:35,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/bfb8e1b2d/2cfbddb702734e93bac2421180fc418e [2022-11-19 07:34:35,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:35,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:35,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:35,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:35,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:35,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:35" (1/1) ... [2022-11-19 07:34:35,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c8a23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:35, skipping insertion in model container [2022-11-19 07:34:35,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:35" (1/1) ... [2022-11-19 07:34:35,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:35,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:36,268 WARN L234 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_a46072f6-f760-4365-bcd9-2962ceebbb5a/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-11-19 07:34:36,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:36,310 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) [2022-11-19 07:34:36,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a879f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:36, skipping insertion in model container [2022-11-19 07:34:36,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:36,311 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:34:36,314 INFO L158 Benchmark]: Toolchain (without parser) took 358.37ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 87.9MB in the end (delta: -13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:34:36,315 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:34:36,317 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.74ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 87.9MB in the end (delta: -13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:34:36,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.74ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 87.9MB in the end (delta: -13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 143]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS --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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --- 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-8393723 [2022-11-19 07:34:38,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:38,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:38,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:38,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:38,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:38,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:38,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:38,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:38,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:38,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:38,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:38,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:38,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:38,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:38,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:38,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:38,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:38,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:38,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:38,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:38,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:38,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:38,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:38,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:38,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:38,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:38,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:38,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:38,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:38,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:38,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:38,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:38,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:38,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:38,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:38,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:38,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:38,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:38,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:38,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:38,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:34:38,543 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:38,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:38,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:38,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:38,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:38,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:38,545 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:38,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:38,546 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:38,546 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:38,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:38,546 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:38,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:34:38,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:34:38,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:38,548 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:34:38,548 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:34:38,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:38,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:34:38,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:38,549 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:34:38,549 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:34:38,549 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:34:38,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:38,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:34:38,550 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:34:38,550 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:34:38,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:34:38,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:38,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:38,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:34:38,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:38,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:38,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:38,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:38,552 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:34:38,552 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:34:38,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:38,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:34:38,553 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_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f [2022-11-19 07:34:38,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:38,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:38,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:38,971 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:38,972 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:38,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-11-19 07:34:39,058 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/cca322abc/b7c3ad9d080d443da236dd90d30194e4/FLAG1b4f97e4f [2022-11-19 07:34:39,629 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:39,630 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-11-19 07:34:39,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/cca322abc/b7c3ad9d080d443da236dd90d30194e4/FLAG1b4f97e4f [2022-11-19 07:34:40,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/data/cca322abc/b7c3ad9d080d443da236dd90d30194e4 [2022-11-19 07:34:40,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:40,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:40,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:40,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:40,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:40,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e07d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40, skipping insertion in model container [2022-11-19 07:34:40,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:40,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:40,329 WARN L234 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_a46072f6-f760-4365-bcd9-2962ceebbb5a/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-11-19 07:34:40,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:40,372 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:34:40,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:40,416 WARN L234 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_a46072f6-f760-4365-bcd9-2962ceebbb5a/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-11-19 07:34:40,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:40,436 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:34:40,480 WARN L234 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_a46072f6-f760-4365-bcd9-2962ceebbb5a/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c[3271,3284] [2022-11-19 07:34:40,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:40,506 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:34:40,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40 WrapperNode [2022-11-19 07:34:40,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:40,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:40,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:34:40,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:34:40,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,582 INFO L138 Inliner]: procedures = 29, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 172 [2022-11-19 07:34:40,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:40,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:34:40,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:34:40,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:34:40,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:34:40,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:34:40,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:34:40,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:34:40,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (1/1) ... [2022-11-19 07:34:40,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:40,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:34:40,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:34:40,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:34:40,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:34:40,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:34:40,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:34:40,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:34:40,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:34:40,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:34:40,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:34:40,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:34:40,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:34:40,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 07:34:40,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 07:34:40,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-19 07:34:40,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-19 07:34:40,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:34:40,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:34:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:34:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:34:40,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:34:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:34:40,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:34:40,759 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:34:40,919 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:34:40,921 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:34:41,775 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:34:42,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:34:42,062 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 07:34:42,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:42 BoogieIcfgContainer [2022-11-19 07:34:42,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:34:42,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:34:42,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:34:42,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:34:42,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:40" (1/3) ... [2022-11-19 07:34:42,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a8d3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:42, skipping insertion in model container [2022-11-19 07:34:42,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:40" (2/3) ... [2022-11-19 07:34:42,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a8d3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:42, skipping insertion in model container [2022-11-19 07:34:42,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:42" (3/3) ... [2022-11-19 07:34:42,092 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2022-11-19 07:34:42,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:34:42,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-11-19 07:34:42,113 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:34:42,279 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-19 07:34:42,327 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:34:42,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 245 places, 243 transitions, 526 flow [2022-11-19 07:34:42,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 245 places, 243 transitions, 526 flow [2022-11-19 07:34:42,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 243 transitions, 526 flow [2022-11-19 07:34:42,507 INFO L130 PetriNetUnfolder]: 14/238 cut-off events. [2022-11-19 07:34:42,508 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-19 07:34:42,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 238 events. 14/238 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 335 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 188. Up to 2 conditions per place. [2022-11-19 07:34:42,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 8466 [2022-11-19 07:35:23,576 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 119 DAG size of output: 117 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:35:32,080 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 135 DAG size of output: 134 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:35:41,136 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 144 DAG size of output: 143 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:35:43,594 INFO L134 LiptonReduction]: Checked pairs total: 14491 [2022-11-19 07:35:43,594 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-19 07:35:43,602 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 102 places, 91 transitions, 222 flow [2022-11-19 07:35:48,270 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108458 states, 94850 states have (on average 5.793473906167633) internal successors, (549511), 108457 states have internal predecessors, (549511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:48,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:35:48,301 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;@3f7d606e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:35:48,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2022-11-19 07:35:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 108458 states, 94850 states have (on average 5.793473906167633) internal successors, (549511), 108457 states have internal predecessors, (549511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:35:48,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:48,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:35:48,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:35:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:48,447 INFO L85 PathProgramCache]: Analyzing trace with hash 32689, now seen corresponding path program 1 times [2022-11-19 07:35:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:35:48,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807000540] [2022-11-19 07:35:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:48,461 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 [2022-11-19 07:35:48,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:35:48,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:35:48,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:35:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:35:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:48,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:48,660 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:35:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807000540] [2022-11-19 07:35:48,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807000540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:48,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:48,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:35:48,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438135042] [2022-11-19 07:35:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:48,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:35:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:48,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:48,956 INFO L87 Difference]: Start difference. First operand has 108458 states, 94850 states have (on average 5.793473906167633) internal successors, (549511), 108457 states have internal predecessors, (549511), 0 states have call successors, (0), 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) [2022-11-19 07:35:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:50,391 INFO L93 Difference]: Finished difference Result 22628 states and 113177 transitions. [2022-11-19 07:35:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:50,394 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 [2022-11-19 07:35:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:50,955 INFO L225 Difference]: With dead ends: 22628 [2022-11-19 07:35:50,981 INFO L226 Difference]: Without dead ends: 22628 [2022-11-19 07:35:50,982 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 [2022-11-19 07:35:50,986 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:50,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:35:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22628 states. [2022-11-19 07:35:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22628 to 22626. [2022-11-19 07:35:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22626 states, 21171 states have (on average 5.3458504558121955) internal successors, (113177), 22625 states have internal predecessors, (113177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22626 states to 22626 states and 113177 transitions. [2022-11-19 07:35:52,774 INFO L78 Accepts]: Start accepts. Automaton has 22626 states and 113177 transitions. Word has length 2 [2022-11-19 07:35:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:52,779 INFO L495 AbstractCegarLoop]: Abstraction has 22626 states and 113177 transitions. [2022-11-19 07:35:52,779 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) [2022-11-19 07:35:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22626 states and 113177 transitions. [2022-11-19 07:35:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:35:52,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:52,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:35:52,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:35:52,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:35:52,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:35:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash 32575, now seen corresponding path program 1 times [2022-11-19 07:35:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:35:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477110129] [2022-11-19 07:35:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:52,993 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 [2022-11-19 07:35:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:35:52,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:35:53,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:35:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:53,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:35:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:53,414 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2022-11-19 07:35:53,415 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 5 case distinctions, treesize of input 21 treesize of output 93 [2022-11-19 07:35:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:53,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:53,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:35:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477110129] [2022-11-19 07:35:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477110129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:53,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:53,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:35:53,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403361167] [2022-11-19 07:35:53,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:53,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:53,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:35:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:53,457 INFO L87 Difference]: Start difference. First operand 22626 states and 113177 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) [2022-11-19 07:35:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:54,156 INFO L93 Difference]: Finished difference Result 22625 states and 113175 transitions. [2022-11-19 07:35:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:54,157 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 [2022-11-19 07:35:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:54,726 INFO L225 Difference]: With dead ends: 22625 [2022-11-19 07:35:54,726 INFO L226 Difference]: Without dead ends: 22625 [2022-11-19 07:35:54,726 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 [2022-11-19 07:35:54,727 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:54,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 4 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:35:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22625 states. [2022-11-19 07:35:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22625 to 22625. [2022-11-19 07:35:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22625 states, 21171 states have (on average 5.345755986963299) internal successors, (113175), 22624 states have internal predecessors, (113175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22625 states to 22625 states and 113175 transitions. [2022-11-19 07:35:55,867 INFO L78 Accepts]: Start accepts. Automaton has 22625 states and 113175 transitions. Word has length 2 [2022-11-19 07:35:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:55,868 INFO L495 AbstractCegarLoop]: Abstraction has 22625 states and 113175 transitions. [2022-11-19 07:35:55,868 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) [2022-11-19 07:35:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 22625 states and 113175 transitions. [2022-11-19 07:35:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:35:55,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:55,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:35:55,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:56,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:35:56,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:35:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 32576, now seen corresponding path program 1 times [2022-11-19 07:35:56,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:35:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360351275] [2022-11-19 07:35:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:35:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:35:56,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:35:56,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:35:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:56,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:35:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:56,937 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:35:56,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:35:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:56,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:56,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:35:56,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360351275] [2022-11-19 07:35:56,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360351275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:56,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:56,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:35:56,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180833206] [2022-11-19 07:35:56,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:56,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:56,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:35:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:56,998 INFO L87 Difference]: Start difference. First operand 22625 states and 113175 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) [2022-11-19 07:35:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:57,548 INFO L93 Difference]: Finished difference Result 22625 states and 113174 transitions. [2022-11-19 07:35:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:57,549 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 [2022-11-19 07:35:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:57,726 INFO L225 Difference]: With dead ends: 22625 [2022-11-19 07:35:57,726 INFO L226 Difference]: Without dead ends: 22625 [2022-11-19 07:35:57,727 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 [2022-11-19 07:35:57,728 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:57,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-19 07:35:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22625 states. [2022-11-19 07:35:58,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22625 to 22625. [2022-11-19 07:35:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22625 states, 21171 states have (on average 5.34570875253885) internal successors, (113174), 22624 states have internal predecessors, (113174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22625 states to 22625 states and 113174 transitions. [2022-11-19 07:35:58,861 INFO L78 Accepts]: Start accepts. Automaton has 22625 states and 113174 transitions. Word has length 2 [2022-11-19 07:35:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:58,862 INFO L495 AbstractCegarLoop]: Abstraction has 22625 states and 113174 transitions. [2022-11-19 07:35:58,862 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) [2022-11-19 07:35:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22625 states and 113174 transitions. [2022-11-19 07:35:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:35:58,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:58,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:35:58,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:35:59,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:35:59,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:35:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1013839, now seen corresponding path program 1 times [2022-11-19 07:35:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:35:59,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533626814] [2022-11-19 07:35:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:59,065 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 [2022-11-19 07:35:59,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:35:59,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:35:59,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:35:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:59,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:35:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,603 INFO L321 Elim1Store]: treesize reduction 115, result has 32.4 percent of original size [2022-11-19 07:35:59,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:35:59,656 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:35:59,656 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 40 treesize of output 34 [2022-11-19 07:35:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:35:59,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:59,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:35:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533626814] [2022-11-19 07:35:59,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533626814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:59,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:59,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:35:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565869599] [2022-11-19 07:35:59,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:59,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:35:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:59,811 INFO L87 Difference]: Start difference. First operand 22625 states and 113174 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:00,281 INFO L93 Difference]: Finished difference Result 22624 states and 113173 transitions. [2022-11-19 07:36:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:36:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:00,770 INFO L225 Difference]: With dead ends: 22624 [2022-11-19 07:36:00,770 INFO L226 Difference]: Without dead ends: 22624 [2022-11-19 07:36:00,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:00,775 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:00,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-19 07:36:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22624 states. [2022-11-19 07:36:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22624 to 22624. [2022-11-19 07:36:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22624 states, 21171 states have (on average 5.345661518114402) internal successors, (113173), 22623 states have internal predecessors, (113173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22624 states to 22624 states and 113173 transitions. [2022-11-19 07:36:01,691 INFO L78 Accepts]: Start accepts. Automaton has 22624 states and 113173 transitions. Word has length 3 [2022-11-19 07:36:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:01,693 INFO L495 AbstractCegarLoop]: Abstraction has 22624 states and 113173 transitions. [2022-11-19 07:36:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 22624 states and 113173 transitions. [2022-11-19 07:36:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:36:01,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:01,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:36:01,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:01,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:01,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1013841, now seen corresponding path program 1 times [2022-11-19 07:36:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:01,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460815549] [2022-11-19 07:36:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:01,907 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 [2022-11-19 07:36:01,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:01,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:02,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:36:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:02,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:36:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:02,728 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2022-11-19 07:36:02,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 61 treesize of output 76 [2022-11-19 07:36:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:02,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:02,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460815549] [2022-11-19 07:36:02,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460815549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:02,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:02,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:02,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134074163] [2022-11-19 07:36:02,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:02,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:02,900 INFO L87 Difference]: Start difference. First operand 22624 states and 113173 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:03,482 INFO L93 Difference]: Finished difference Result 22623 states and 113172 transitions. [2022-11-19 07:36:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:36:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:03,663 INFO L225 Difference]: With dead ends: 22623 [2022-11-19 07:36:03,663 INFO L226 Difference]: Without dead ends: 22623 [2022-11-19 07:36:03,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:03,664 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:03,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-11-19 07:36:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22623 states. [2022-11-19 07:36:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22623 to 22623. [2022-11-19 07:36:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22623 states, 21171 states have (on average 5.345614283689954) internal successors, (113172), 22622 states have internal predecessors, (113172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22623 states to 22623 states and 113172 transitions. [2022-11-19 07:36:05,119 INFO L78 Accepts]: Start accepts. Automaton has 22623 states and 113172 transitions. Word has length 3 [2022-11-19 07:36:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:05,119 INFO L495 AbstractCegarLoop]: Abstraction has 22623 states and 113172 transitions. [2022-11-19 07:36:05,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22623 states and 113172 transitions. [2022-11-19 07:36:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:36:05,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:05,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:36:05,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:05,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:05,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1013726, now seen corresponding path program 1 times [2022-11-19 07:36:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:05,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715888283] [2022-11-19 07:36:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:05,327 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 [2022-11-19 07:36:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:05,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:05,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:36:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:05,757 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:05,757 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:05,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:06,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715888283] [2022-11-19 07:36:06,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715888283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205211847] [2022-11-19 07:36:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:06,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:06,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:06,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-19 07:36:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:06,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:36:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:06,630 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:06,630 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:06,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:06,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205211847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085236698] [2022-11-19 07:36:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:06,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:06,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:06,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:36:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:36:06,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:07,263 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:07,263 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:07,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:07,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085236698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:07,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:36:07,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:36:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790949246] [2022-11-19 07:36:07,476 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:36:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:36:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:07,478 INFO L87 Difference]: Start difference. First operand 22623 states and 113172 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) [2022-11-19 07:36:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:10,980 INFO L93 Difference]: Finished difference Result 67864 states and 339512 transitions. [2022-11-19 07:36:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:10,981 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 [2022-11-19 07:36:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:11,475 INFO L225 Difference]: With dead ends: 67864 [2022-11-19 07:36:11,475 INFO L226 Difference]: Without dead ends: 67864 [2022-11-19 07:36:11,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:36:11,476 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 395 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:11,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 16 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:36:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67864 states. [2022-11-19 07:36:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67864 to 22626. [2022-11-19 07:36:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22626 states, 21174 states have (on average 5.345140266364409) internal successors, (113178), 22625 states have internal predecessors, (113178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22626 states to 22626 states and 113178 transitions. [2022-11-19 07:36:13,114 INFO L78 Accepts]: Start accepts. Automaton has 22626 states and 113178 transitions. Word has length 3 [2022-11-19 07:36:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:13,114 INFO L495 AbstractCegarLoop]: Abstraction has 22626 states and 113178 transitions. [2022-11-19 07:36:13,114 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) [2022-11-19 07:36:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22626 states and 113178 transitions. [2022-11-19 07:36:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:36:13,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:13,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:36:13,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:13,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-19 07:36:13,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-19 07:36:13,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:13,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 974324072, now seen corresponding path program 1 times [2022-11-19 07:36:13,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:13,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924960210] [2022-11-19 07:36:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:13,718 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 [2022-11-19 07:36:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:13,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:13,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:36:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:14,100 INFO L321 Elim1Store]: treesize reduction 240, result has 26.4 percent of original size [2022-11-19 07:36:14,101 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 5 case distinctions, treesize of input 21 treesize of output 93 [2022-11-19 07:36:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:14,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:14,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924960210] [2022-11-19 07:36:14,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924960210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:14,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:36:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330838936] [2022-11-19 07:36:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:14,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:36:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:36:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:36:14,145 INFO L87 Difference]: Start difference. First operand 22626 states and 113178 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:14,511 INFO L93 Difference]: Finished difference Result 8602 states and 42506 transitions. [2022-11-19 07:36:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:36:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:36:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:14,555 INFO L225 Difference]: With dead ends: 8602 [2022-11-19 07:36:14,556 INFO L226 Difference]: Without dead ends: 8602 [2022-11-19 07:36:14,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:36:14,556 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 119 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:14,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 2 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:36:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2022-11-19 07:36:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 8602. [2022-11-19 07:36:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 8323 states have (on average 5.107052745404301) internal successors, (42506), 8601 states have internal predecessors, (42506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 42506 transitions. [2022-11-19 07:36:15,290 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 42506 transitions. Word has length 5 [2022-11-19 07:36:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:15,291 INFO L495 AbstractCegarLoop]: Abstraction has 8602 states and 42506 transitions. [2022-11-19 07:36:15,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 42506 transitions. [2022-11-19 07:36:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:36:15,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:15,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:36:15,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:36:15,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:15,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 974324073, now seen corresponding path program 1 times [2022-11-19 07:36:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968122714] [2022-11-19 07:36:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:15,493 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 [2022-11-19 07:36:15,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:15,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:15,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:15,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:36:15,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:15,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:15,798 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 [2022-11-19 07:36:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:15,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968122714] [2022-11-19 07:36:15,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968122714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:15,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012155380] [2022-11-19 07:36:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:15,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:15,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:15,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-19 07:36:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:16,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:36:16,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:16,422 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:16,422 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:16,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:16,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1012155380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:16,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261445510] [2022-11-19 07:36:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:16,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:16,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:16,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:36:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:16,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:36:16,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:17,375 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:17,375 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:17,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261445510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:17,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:36:17,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 07:36:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95512394] [2022-11-19 07:36:17,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:36:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:36:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:36:17,617 INFO L87 Difference]: Start difference. First operand 8602 states and 42506 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:20,623 INFO L93 Difference]: Finished difference Result 12678 states and 61594 transitions. [2022-11-19 07:36:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:36:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:36:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:20,691 INFO L225 Difference]: With dead ends: 12678 [2022-11-19 07:36:20,692 INFO L226 Difference]: Without dead ends: 12678 [2022-11-19 07:36:20,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:36:20,693 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:20,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 38 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 688 Invalid, 0 Unknown, 7 Unchecked, 2.6s Time] [2022-11-19 07:36:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2022-11-19 07:36:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 8601. [2022-11-19 07:36:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8322 states have (on average 5.005287190579188) internal successors, (41654), 8600 states have internal predecessors, (41654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 41654 transitions. [2022-11-19 07:36:21,017 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 41654 transitions. Word has length 5 [2022-11-19 07:36:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:21,017 INFO L495 AbstractCegarLoop]: Abstraction has 8601 states and 41654 transitions. [2022-11-19 07:36:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 41654 transitions. [2022-11-19 07:36:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:36:21,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:21,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:36:21,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:21,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:21,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:21,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:21,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash 974324353, now seen corresponding path program 1 times [2022-11-19 07:36:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:21,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833957891] [2022-11-19 07:36:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:21,620 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 [2022-11-19 07:36:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:21,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:36:21,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:21,967 INFO L321 Elim1Store]: treesize reduction 316, result has 11.2 percent of original size [2022-11-19 07:36:21,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 92 [2022-11-19 07:36:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:22,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:22,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833957891] [2022-11-19 07:36:22,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833957891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:22,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:22,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541435597] [2022-11-19 07:36:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:22,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:22,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:22,229 INFO L87 Difference]: Start difference. First operand 8601 states and 41654 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:22,657 INFO L93 Difference]: Finished difference Result 8599 states and 41651 transitions. [2022-11-19 07:36:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:22,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:36:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:22,691 INFO L225 Difference]: With dead ends: 8599 [2022-11-19 07:36:22,691 INFO L226 Difference]: Without dead ends: 8599 [2022-11-19 07:36:22,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:22,692 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:22,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-11-19 07:36:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8599 states. [2022-11-19 07:36:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8599 to 8599. [2022-11-19 07:36:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8599 states, 8321 states have (on average 5.00552818170893) internal successors, (41651), 8598 states have internal predecessors, (41651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8599 states to 8599 states and 41651 transitions. [2022-11-19 07:36:22,898 INFO L78 Accepts]: Start accepts. Automaton has 8599 states and 41651 transitions. Word has length 5 [2022-11-19 07:36:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:22,898 INFO L495 AbstractCegarLoop]: Abstraction has 8599 states and 41651 transitions. [2022-11-19 07:36:22,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 8599 states and 41651 transitions. [2022-11-19 07:36:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:36:22,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:22,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:36:22,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:23,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 974324354, now seen corresponding path program 1 times [2022-11-19 07:36:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:23,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115885750] [2022-11-19 07:36:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:23,101 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 [2022-11-19 07:36:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:23,102 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:23,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:23,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:36:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:23,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,677 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2022-11-19 07:36:23,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2022-11-19 07:36:23,748 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:36:23,749 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 52 treesize of output 46 [2022-11-19 07:36:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:23,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:23,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115885750] [2022-11-19 07:36:23,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115885750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:23,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:23,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:23,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533111794] [2022-11-19 07:36:23,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:23,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:23,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:23,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:23,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:23,917 INFO L87 Difference]: Start difference. First operand 8599 states and 41651 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:24,188 INFO L93 Difference]: Finished difference Result 8597 states and 41648 transitions. [2022-11-19 07:36:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:36:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:24,223 INFO L225 Difference]: With dead ends: 8597 [2022-11-19 07:36:24,223 INFO L226 Difference]: Without dead ends: 8597 [2022-11-19 07:36:24,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:24,224 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:24,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 07:36:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8597 states. [2022-11-19 07:36:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8597 to 8597. [2022-11-19 07:36:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8597 states, 8320 states have (on average 5.005769230769231) internal successors, (41648), 8596 states have internal predecessors, (41648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8597 states to 8597 states and 41648 transitions. [2022-11-19 07:36:24,448 INFO L78 Accepts]: Start accepts. Automaton has 8597 states and 41648 transitions. Word has length 5 [2022-11-19 07:36:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:24,448 INFO L495 AbstractCegarLoop]: Abstraction has 8597 states and 41648 transitions. [2022-11-19 07:36:24,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8597 states and 41648 transitions. [2022-11-19 07:36:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:36:24,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:24,449 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:36:24,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:36:24,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:24,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash 138983104, now seen corresponding path program 2 times [2022-11-19 07:36:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:24,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816399674] [2022-11-19 07:36:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:36:24,650 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 [2022-11-19 07:36:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:24,654 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:24,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:24,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:36:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:36:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:25,125 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:25,125 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:25,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:26,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:26,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816399674] [2022-11-19 07:36:26,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816399674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:26,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388385996] [2022-11-19 07:36:26,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:36:26,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:26,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:26,136 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:26,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-19 07:36:26,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:36:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:36:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:26,808 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:26,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:27,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:27,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1388385996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:27,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975793026] [2022-11-19 07:36:27,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:36:27,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:27,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:27,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:27,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:36:27,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:36:27,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:36:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:27,943 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:27,943 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:28,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:28,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975793026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:28,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:36:28,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-19 07:36:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320304791] [2022-11-19 07:36:28,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:28,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:36:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:36:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:36:28,224 INFO L87 Difference]: Start difference. First operand 8597 states and 41648 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:36,455 INFO L93 Difference]: Finished difference Result 77323 states and 374756 transitions. [2022-11-19 07:36:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:36:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-11-19 07:36:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:36,870 INFO L225 Difference]: With dead ends: 77323 [2022-11-19 07:36:36,870 INFO L226 Difference]: Without dead ends: 77323 [2022-11-19 07:36:36,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:36:36,871 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1380 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:36,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 62 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 07:36:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77323 states. [2022-11-19 07:36:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77323 to 8603. [2022-11-19 07:36:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8326 states have (on average 5.003603170790296) internal successors, (41660), 8602 states have internal predecessors, (41660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 41660 transitions. [2022-11-19 07:36:38,062 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 41660 transitions. Word has length 6 [2022-11-19 07:36:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:38,062 INFO L495 AbstractCegarLoop]: Abstraction has 8603 states and 41660 transitions. [2022-11-19 07:36:38,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 41660 transitions. [2022-11-19 07:36:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:36:38,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:38,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:36:38,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:38,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:38,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:38,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:38,665 INFO L85 PathProgramCache]: Analyzing trace with hash 139276178, now seen corresponding path program 1 times [2022-11-19 07:36:38,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:38,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936133906] [2022-11-19 07:36:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:38,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:38,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:38,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:36:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:39,016 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2022-11-19 07:36:39,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2022-11-19 07:36:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:39,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:39,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:39,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936133906] [2022-11-19 07:36:39,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936133906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:39,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:39,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:39,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052584412] [2022-11-19 07:36:39,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:39,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:39,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:39,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:39,539 INFO L87 Difference]: Start difference. First operand 8603 states and 41660 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:36:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:39,772 INFO L93 Difference]: Finished difference Result 8602 states and 41658 transitions. [2022-11-19 07:36:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-19 07:36:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:39,804 INFO L225 Difference]: With dead ends: 8602 [2022-11-19 07:36:39,804 INFO L226 Difference]: Without dead ends: 8602 [2022-11-19 07:36:39,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:39,805 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:39,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:36:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2022-11-19 07:36:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 8602. [2022-11-19 07:36:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 8325 states have (on average 5.003963963963964) internal successors, (41658), 8601 states have internal predecessors, (41658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 41658 transitions. [2022-11-19 07:36:39,995 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 41658 transitions. Word has length 6 [2022-11-19 07:36:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:39,995 INFO L495 AbstractCegarLoop]: Abstraction has 8602 states and 41658 transitions. [2022-11-19 07:36:39,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:36:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 41658 transitions. [2022-11-19 07:36:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:36:39,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:39,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:36:40,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:40,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:40,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 139276179, now seen corresponding path program 1 times [2022-11-19 07:36:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731784708] [2022-11-19 07:36:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:40,198 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 [2022-11-19 07:36:40,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:40,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:40,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:36:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:40,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,734 INFO L321 Elim1Store]: treesize reduction 86, result has 37.7 percent of original size [2022-11-19 07:36:40,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 59 [2022-11-19 07:36:40,817 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-19 07:36:40,817 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 249 treesize of output 246 [2022-11-19 07:36:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:41,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:41,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731784708] [2022-11-19 07:36:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731784708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:41,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:41,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:41,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277024205] [2022-11-19 07:36:41,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:41,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:41,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:41,039 INFO L87 Difference]: Start difference. First operand 8602 states and 41658 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:36:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:41,309 INFO L93 Difference]: Finished difference Result 8601 states and 41656 transitions. [2022-11-19 07:36:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:41,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-19 07:36:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:41,344 INFO L225 Difference]: With dead ends: 8601 [2022-11-19 07:36:41,344 INFO L226 Difference]: Without dead ends: 8601 [2022-11-19 07:36:41,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:41,351 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:41,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 07:36:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2022-11-19 07:36:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 8601. [2022-11-19 07:36:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8324 states have (on average 5.004324843825084) internal successors, (41656), 8600 states have internal predecessors, (41656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 41656 transitions. [2022-11-19 07:36:41,827 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 41656 transitions. Word has length 6 [2022-11-19 07:36:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:41,827 INFO L495 AbstractCegarLoop]: Abstraction has 8601 states and 41656 transitions. [2022-11-19 07:36:41,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:36:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 41656 transitions. [2022-11-19 07:36:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:36:41,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:41,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:36:41,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:36:42,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:42,030 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 139284516, now seen corresponding path program 1 times [2022-11-19 07:36:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:42,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493779764] [2022-11-19 07:36:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:42,032 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 [2022-11-19 07:36:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:42,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:42,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:42,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:36:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:42,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:42,336 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 [2022-11-19 07:36:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:42,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493779764] [2022-11-19 07:36:42,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493779764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [570783835] [2022-11-19 07:36:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:42,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:42,398 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:42,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-19 07:36:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:36:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:43,003 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:43,004 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:43,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:43,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [570783835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20684644] [2022-11-19 07:36:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:43,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:43,445 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:43,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:36:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:36:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:43,910 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:43,910 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:44,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20684644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:44,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:36:44,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 07:36:44,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351374580] [2022-11-19 07:36:44,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:36:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:36:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:36:44,147 INFO L87 Difference]: Start difference. First operand 8601 states and 41656 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:46,980 INFO L93 Difference]: Finished difference Result 12678 states and 61594 transitions. [2022-11-19 07:36:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:36:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:36:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:47,031 INFO L225 Difference]: With dead ends: 12678 [2022-11-19 07:36:47,032 INFO L226 Difference]: Without dead ends: 12678 [2022-11-19 07:36:47,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:36:47,032 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:47,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 38 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 700 Invalid, 0 Unknown, 5 Unchecked, 2.5s Time] [2022-11-19 07:36:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2022-11-19 07:36:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 8600. [2022-11-19 07:36:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8600 states, 8323 states have (on average 5.004685810404902) internal successors, (41654), 8599 states have internal predecessors, (41654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8600 states to 8600 states and 41654 transitions. [2022-11-19 07:36:47,288 INFO L78 Accepts]: Start accepts. Automaton has 8600 states and 41654 transitions. Word has length 6 [2022-11-19 07:36:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:47,288 INFO L495 AbstractCegarLoop]: Abstraction has 8600 states and 41654 transitions. [2022-11-19 07:36:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8600 states and 41654 transitions. [2022-11-19 07:36:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:36:47,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:47,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:47,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:47,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:47,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:47,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:47,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash 22590936, now seen corresponding path program 1 times [2022-11-19 07:36:47,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:47,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185732419] [2022-11-19 07:36:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:47,891 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 [2022-11-19 07:36:47,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:47,892 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:47,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:36:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:48,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:48,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:48,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185732419] [2022-11-19 07:36:48,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185732419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:48,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:48,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:36:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524451670] [2022-11-19 07:36:48,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:36:48,082 INFO L87 Difference]: Start difference. First operand 8600 states and 41654 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-19 07:36:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:49,011 INFO L93 Difference]: Finished difference Result 12858 states and 60100 transitions. [2022-11-19 07:36:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:36:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2022-11-19 07:36:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:49,063 INFO L225 Difference]: With dead ends: 12858 [2022-11-19 07:36:49,063 INFO L226 Difference]: Without dead ends: 12858 [2022-11-19 07:36:49,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:36:49,064 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 249 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:49,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 12 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:36:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12858 states. [2022-11-19 07:36:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12858 to 10452. [2022-11-19 07:36:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10175 states have (on average 4.983587223587223) internal successors, (50708), 10451 states have internal predecessors, (50708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 50708 transitions. [2022-11-19 07:36:49,331 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 50708 transitions. Word has length 7 [2022-11-19 07:36:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:49,331 INFO L495 AbstractCegarLoop]: Abstraction has 10452 states and 50708 transitions. [2022-11-19 07:36:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-19 07:36:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 50708 transitions. [2022-11-19 07:36:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:36:49,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:49,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:49,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:49,533 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:49,533 INFO L85 PathProgramCache]: Analyzing trace with hash 22591086, now seen corresponding path program 1 times [2022-11-19 07:36:49,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:49,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245936919] [2022-11-19 07:36:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:49,533 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 [2022-11-19 07:36:49,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:49,534 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:36:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:49,876 INFO L321 Elim1Store]: treesize reduction 316, result has 11.2 percent of original size [2022-11-19 07:36:49,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 92 [2022-11-19 07:36:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:50,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:50,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245936919] [2022-11-19 07:36:50,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245936919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:50,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:50,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979063983] [2022-11-19 07:36:50,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:50,195 INFO L87 Difference]: Start difference. First operand 10452 states and 50708 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:50,476 INFO L93 Difference]: Finished difference Result 10451 states and 50705 transitions. [2022-11-19 07:36:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:36:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:50,523 INFO L225 Difference]: With dead ends: 10451 [2022-11-19 07:36:50,523 INFO L226 Difference]: Without dead ends: 10451 [2022-11-19 07:36:50,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:50,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:50,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:36:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10451 states. [2022-11-19 07:36:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10451 to 10451. [2022-11-19 07:36:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10451 states, 10174 states have (on average 4.983782189895813) internal successors, (50705), 10450 states have internal predecessors, (50705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10451 states to 10451 states and 50705 transitions. [2022-11-19 07:36:50,981 INFO L78 Accepts]: Start accepts. Automaton has 10451 states and 50705 transitions. Word has length 7 [2022-11-19 07:36:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:50,981 INFO L495 AbstractCegarLoop]: Abstraction has 10451 states and 50705 transitions. [2022-11-19 07:36:50,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 10451 states and 50705 transitions. [2022-11-19 07:36:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:36:50,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:50,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:50,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:51,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:51,186 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash 22591087, now seen corresponding path program 1 times [2022-11-19 07:36:51,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:51,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276120996] [2022-11-19 07:36:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:51,187 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 [2022-11-19 07:36:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:51,188 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:51,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:36:51,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:51,760 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2022-11-19 07:36:51,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2022-11-19 07:36:51,813 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:36:51,813 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 52 treesize of output 46 [2022-11-19 07:36:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:36:51,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:36:51,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:51,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276120996] [2022-11-19 07:36:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276120996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:51,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:36:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407409165] [2022-11-19 07:36:51,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:51,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:36:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:36:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:51,984 INFO L87 Difference]: Start difference. First operand 10451 states and 50705 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:52,245 INFO L93 Difference]: Finished difference Result 10450 states and 50702 transitions. [2022-11-19 07:36:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:36:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:36:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:52,289 INFO L225 Difference]: With dead ends: 10450 [2022-11-19 07:36:52,289 INFO L226 Difference]: Without dead ends: 10450 [2022-11-19 07:36:52,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:36:52,289 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:52,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 07:36:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10450 states. [2022-11-19 07:36:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10450 to 10450. [2022-11-19 07:36:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10450 states, 10173 states have (on average 4.983977194534552) internal successors, (50702), 10449 states have internal predecessors, (50702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10450 states to 10450 states and 50702 transitions. [2022-11-19 07:36:52,544 INFO L78 Accepts]: Start accepts. Automaton has 10450 states and 50702 transitions. Word has length 7 [2022-11-19 07:36:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:52,545 INFO L495 AbstractCegarLoop]: Abstraction has 10450 states and 50702 transitions. [2022-11-19 07:36:52,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10450 states and 50702 transitions. [2022-11-19 07:36:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:36:52,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:52,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:52,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:36:52,746 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 22855763, now seen corresponding path program 1 times [2022-11-19 07:36:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032038071] [2022-11-19 07:36:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:52,747 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 [2022-11-19 07:36:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:52,748 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:52,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:36:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:52,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:53,067 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 [2022-11-19 07:36:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:53,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:53,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032038071] [2022-11-19 07:36:53,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032038071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:53,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708004152] [2022-11-19 07:36:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:53,134 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:53,135 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:53,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-19 07:36:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:36:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:53,787 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:53,788 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:54,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:54,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708004152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:54,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493222510] [2022-11-19 07:36:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:54,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:54,314 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:54,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:36:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:36:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:54,838 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:54,839 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:54,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493222510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:55,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:36:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 07:36:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726912537] [2022-11-19 07:36:55,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:55,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:36:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:36:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:36:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:36:55,075 INFO L87 Difference]: Start difference. First operand 10450 states and 50702 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:56,889 INFO L93 Difference]: Finished difference Result 10450 states and 50692 transitions. [2022-11-19 07:36:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:36:56,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:36:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:56,928 INFO L225 Difference]: With dead ends: 10450 [2022-11-19 07:36:56,928 INFO L226 Difference]: Without dead ends: 10450 [2022-11-19 07:36:56,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:36:56,929 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:56,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 356 Invalid, 0 Unknown, 11 Unchecked, 1.4s Time] [2022-11-19 07:36:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10450 states. [2022-11-19 07:36:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10450 to 10445. [2022-11-19 07:36:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10445 states, 10168 states have (on average 4.98426435877262) internal successors, (50680), 10444 states have internal predecessors, (50680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10445 states to 10445 states and 50680 transitions. [2022-11-19 07:36:57,195 INFO L78 Accepts]: Start accepts. Automaton has 10445 states and 50680 transitions. Word has length 7 [2022-11-19 07:36:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 10445 states and 50680 transitions. [2022-11-19 07:36:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:36:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10445 states and 50680 transitions. [2022-11-19 07:36:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:36:57,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:57,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:57,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:57,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:57,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:57,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:57,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:36:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash 22855781, now seen corresponding path program 1 times [2022-11-19 07:36:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:36:57,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631193455] [2022-11-19 07:36:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:57,798 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 [2022-11-19 07:36:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:36:57,798 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:36:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:36:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:36:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:58,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:58,132 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 [2022-11-19 07:36:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:58,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:36:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631193455] [2022-11-19 07:36:58,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631193455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1969780949] [2022-11-19 07:36:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:58,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:36:58,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:36:58,202 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:36:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-19 07:36:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:36:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:58,843 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:58,843 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:59,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:59,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1969780949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037873814] [2022-11-19 07:36:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:59,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:59,311 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:59,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 07:36:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:36:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:59,815 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:36:59,816 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:36:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:59,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:00,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037873814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:00,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:37:00,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 07:37:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463445740] [2022-11-19 07:37:00,074 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:37:00,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:37:00,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:37:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:37:00,075 INFO L87 Difference]: Start difference. First operand 10445 states and 50680 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:01,777 INFO L93 Difference]: Finished difference Result 10443 states and 50661 transitions. [2022-11-19 07:37:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:37:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:37:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:01,822 INFO L225 Difference]: With dead ends: 10443 [2022-11-19 07:37:01,822 INFO L226 Difference]: Without dead ends: 10443 [2022-11-19 07:37:01,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:37:01,823 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:01,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 410 Invalid, 0 Unknown, 10 Unchecked, 1.4s Time] [2022-11-19 07:37:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2022-11-19 07:37:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 10438. [2022-11-19 07:37:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 10161 states have (on average 4.984745595905915) internal successors, (50650), 10437 states have internal predecessors, (50650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 50650 transitions. [2022-11-19 07:37:02,226 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 50650 transitions. Word has length 7 [2022-11-19 07:37:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:02,226 INFO L495 AbstractCegarLoop]: Abstraction has 10438 states and 50650 transitions. [2022-11-19 07:37:02,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 50650 transitions. [2022-11-19 07:37:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:37:02,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:02,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:02,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:02,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:02,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:02,840 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 22856039, now seen corresponding path program 1 times [2022-11-19 07:37:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:02,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675735234] [2022-11-19 07:37:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:02,841 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 [2022-11-19 07:37:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:02,842 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:02,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-19 07:37:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:03,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:37:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:03,179 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2022-11-19 07:37:03,181 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 8 case distinctions, treesize of input 60 treesize of output 81 [2022-11-19 07:37:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:03,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:03,416 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:03,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675735234] [2022-11-19 07:37:03,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675735234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:03,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:03,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320631118] [2022-11-19 07:37:03,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:03,417 INFO L87 Difference]: Start difference. First operand 10438 states and 50650 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:03,668 INFO L93 Difference]: Finished difference Result 10425 states and 50631 transitions. [2022-11-19 07:37:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:37:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:03,711 INFO L225 Difference]: With dead ends: 10425 [2022-11-19 07:37:03,711 INFO L226 Difference]: Without dead ends: 10425 [2022-11-19 07:37:03,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:03,712 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:03,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10425 states. [2022-11-19 07:37:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10425 to 10425. [2022-11-19 07:37:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10425 states, 10153 states have (on average 4.986801930463902) internal successors, (50631), 10424 states have internal predecessors, (50631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10425 states to 10425 states and 50631 transitions. [2022-11-19 07:37:03,957 INFO L78 Accepts]: Start accepts. Automaton has 10425 states and 50631 transitions. Word has length 7 [2022-11-19 07:37:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:03,957 INFO L495 AbstractCegarLoop]: Abstraction has 10425 states and 50631 transitions. [2022-11-19 07:37:03,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10425 states and 50631 transitions. [2022-11-19 07:37:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:37:03,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:03,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:03,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:04,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:04,159 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash 22856041, now seen corresponding path program 1 times [2022-11-19 07:37:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:04,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491357948] [2022-11-19 07:37:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:04,160 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 [2022-11-19 07:37:04,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:04,161 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:04,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 07:37:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:37:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:04,681 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:04,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:04,733 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:04,733 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 39 treesize of output 35 [2022-11-19 07:37:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:04,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:04,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491357948] [2022-11-19 07:37:04,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491357948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:04,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:04,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373541016] [2022-11-19 07:37:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:04,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:04,923 INFO L87 Difference]: Start difference. First operand 10425 states and 50631 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:05,208 INFO L93 Difference]: Finished difference Result 10412 states and 50612 transitions. [2022-11-19 07:37:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:37:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:05,250 INFO L225 Difference]: With dead ends: 10412 [2022-11-19 07:37:05,250 INFO L226 Difference]: Without dead ends: 10412 [2022-11-19 07:37:05,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:05,251 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:05,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-19 07:37:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-11-19 07:37:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 10412. [2022-11-19 07:37:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10412 states, 10145 states have (on average 4.988861508132085) internal successors, (50612), 10411 states have internal predecessors, (50612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10412 states to 10412 states and 50612 transitions. [2022-11-19 07:37:05,615 INFO L78 Accepts]: Start accepts. Automaton has 10412 states and 50612 transitions. Word has length 7 [2022-11-19 07:37:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:05,615 INFO L495 AbstractCegarLoop]: Abstraction has 10412 states and 50612 transitions. [2022-11-19 07:37:05,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 10412 states and 50612 transitions. [2022-11-19 07:37:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:05,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:05,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:05,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:05,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:05,821 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash 700324720, now seen corresponding path program 1 times [2022-11-19 07:37:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:05,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772656957] [2022-11-19 07:37:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:05,822 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 [2022-11-19 07:37:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:05,823 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:05,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:37:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:06,364 INFO L321 Elim1Store]: treesize reduction 220, result has 25.7 percent of original size [2022-11-19 07:37:06,364 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 5 case distinctions, treesize of input 23 treesize of output 83 [2022-11-19 07:37:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:06,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:06,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772656957] [2022-11-19 07:37:06,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772656957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037065279] [2022-11-19 07:37:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:06,957 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:37:06,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:37:06,958 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:37:06,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-19 07:37:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:37:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:07,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:07,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037065279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:07,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568300610] [2022-11-19 07:37:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:07,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:07,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:07,680 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:07,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:37:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:37:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:07,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:08,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568300610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:08,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:37:08,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-19 07:37:08,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867534273] [2022-11-19 07:37:08,059 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:37:08,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:37:08,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:37:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:37:08,060 INFO L87 Difference]: Start difference. First operand 10412 states and 50612 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) [2022-11-19 07:37:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:13,966 INFO L93 Difference]: Finished difference Result 18773 states and 93495 transitions. [2022-11-19 07:37:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:37:13,967 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 8 [2022-11-19 07:37:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:14,046 INFO L225 Difference]: With dead ends: 18773 [2022-11-19 07:37:14,047 INFO L226 Difference]: Without dead ends: 18773 [2022-11-19 07:37:14,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:37:14,047 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1615 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:14,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 68 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-19 07:37:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18773 states. [2022-11-19 07:37:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18773 to 14641. [2022-11-19 07:37:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14641 states, 14502 states have (on average 5.249413873948421) internal successors, (76127), 14640 states have internal predecessors, (76127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14641 states to 14641 states and 76127 transitions. [2022-11-19 07:37:14,600 INFO L78 Accepts]: Start accepts. Automaton has 14641 states and 76127 transitions. Word has length 8 [2022-11-19 07:37:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:14,601 INFO L495 AbstractCegarLoop]: Abstraction has 14641 states and 76127 transitions. [2022-11-19 07:37:14,601 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) [2022-11-19 07:37:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 14641 states and 76127 transitions. [2022-11-19 07:37:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:14,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:14,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:14,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:14,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:15,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:15,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:37:15,205 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 700324870, now seen corresponding path program 1 times [2022-11-19 07:37:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:15,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603149770] [2022-11-19 07:37:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:15,206 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 [2022-11-19 07:37:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:15,208 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:15,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-19 07:37:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:37:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:15,615 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2022-11-19 07:37:15,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2022-11-19 07:37:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:16,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:16,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:16,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603149770] [2022-11-19 07:37:16,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603149770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:16,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:16,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:16,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757585109] [2022-11-19 07:37:16,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:16,289 INFO L87 Difference]: Start difference. First operand 14641 states and 76127 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:16,569 INFO L93 Difference]: Finished difference Result 14636 states and 76112 transitions. [2022-11-19 07:37:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-19 07:37:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:16,633 INFO L225 Difference]: With dead ends: 14636 [2022-11-19 07:37:16,633 INFO L226 Difference]: Without dead ends: 14636 [2022-11-19 07:37:16,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:16,634 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:16,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14636 states. [2022-11-19 07:37:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14636 to 14636. [2022-11-19 07:37:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14636 states, 14497 states have (on average 5.250189694419535) internal successors, (76112), 14635 states have internal predecessors, (76112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14636 states to 14636 states and 76112 transitions. [2022-11-19 07:37:17,188 INFO L78 Accepts]: Start accepts. Automaton has 14636 states and 76112 transitions. Word has length 8 [2022-11-19 07:37:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:17,189 INFO L495 AbstractCegarLoop]: Abstraction has 14636 states and 76112 transitions. [2022-11-19 07:37:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 14636 states and 76112 transitions. [2022-11-19 07:37:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:17,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:17,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:17,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:17,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:17,390 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash 700324871, now seen corresponding path program 1 times [2022-11-19 07:37:17,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616339689] [2022-11-19 07:37:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:17,391 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 [2022-11-19 07:37:17,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:17,392 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:17,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:37:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:17,958 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2022-11-19 07:37:17,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2022-11-19 07:37:18,009 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:37:18,010 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 52 treesize of output 46 [2022-11-19 07:37:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:18,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:18,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:18,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616339689] [2022-11-19 07:37:18,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616339689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:18,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:18,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:18,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188032888] [2022-11-19 07:37:18,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:18,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:18,197 INFO L87 Difference]: Start difference. First operand 14636 states and 76112 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:18,472 INFO L93 Difference]: Finished difference Result 14631 states and 76097 transitions. [2022-11-19 07:37:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:18,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-19 07:37:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:18,538 INFO L225 Difference]: With dead ends: 14631 [2022-11-19 07:37:18,538 INFO L226 Difference]: Without dead ends: 14631 [2022-11-19 07:37:18,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:18,538 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:18,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14631 states. [2022-11-19 07:37:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14631 to 14631. [2022-11-19 07:37:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14631 states, 14492 states have (on average 5.250966050234612) internal successors, (76097), 14630 states have internal predecessors, (76097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14631 states to 14631 states and 76097 transitions. [2022-11-19 07:37:19,151 INFO L78 Accepts]: Start accepts. Automaton has 14631 states and 76097 transitions. Word has length 8 [2022-11-19 07:37:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:19,152 INFO L495 AbstractCegarLoop]: Abstraction has 14631 states and 76097 transitions. [2022-11-19 07:37:19,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 14631 states and 76097 transitions. [2022-11-19 07:37:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:19,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:19,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:19,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:19,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:19,358 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 700444216, now seen corresponding path program 1 times [2022-11-19 07:37:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:19,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178682147] [2022-11-19 07:37:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:19,359 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 [2022-11-19 07:37:19,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:19,359 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:19,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:37:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:19,731 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2022-11-19 07:37:19,732 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 8 case distinctions, treesize of input 60 treesize of output 81 [2022-11-19 07:37:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:19,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:19,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:19,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178682147] [2022-11-19 07:37:19,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178682147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:19,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:19,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109816733] [2022-11-19 07:37:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:19,975 INFO L87 Difference]: Start difference. First operand 14631 states and 76097 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:20,247 INFO L93 Difference]: Finished difference Result 14629 states and 76091 transitions. [2022-11-19 07:37:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-19 07:37:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:20,310 INFO L225 Difference]: With dead ends: 14629 [2022-11-19 07:37:20,310 INFO L226 Difference]: Without dead ends: 14629 [2022-11-19 07:37:20,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:20,311 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:20,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14629 states. [2022-11-19 07:37:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14629 to 14629. [2022-11-19 07:37:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14490 states have (on average 5.251276742581091) internal successors, (76091), 14628 states have internal predecessors, (76091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 76091 transitions. [2022-11-19 07:37:21,010 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 76091 transitions. Word has length 8 [2022-11-19 07:37:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:21,010 INFO L495 AbstractCegarLoop]: Abstraction has 14629 states and 76091 transitions. [2022-11-19 07:37:21,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 76091 transitions. [2022-11-19 07:37:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:21,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:21,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:21,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:21,226 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash 700444218, now seen corresponding path program 1 times [2022-11-19 07:37:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:21,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049597234] [2022-11-19 07:37:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:21,227 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 [2022-11-19 07:37:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:21,228 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:21,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-19 07:37:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:37:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:21,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:21,802 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:21,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:21,842 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:21,842 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 39 treesize of output 35 [2022-11-19 07:37:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:22,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:22,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049597234] [2022-11-19 07:37:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049597234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:22,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:22,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831913986] [2022-11-19 07:37:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:22,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:22,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:22,050 INFO L87 Difference]: Start difference. First operand 14629 states and 76091 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:22,350 INFO L93 Difference]: Finished difference Result 14627 states and 76085 transitions. [2022-11-19 07:37:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:22,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-19 07:37:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:22,414 INFO L225 Difference]: With dead ends: 14627 [2022-11-19 07:37:22,414 INFO L226 Difference]: Without dead ends: 14627 [2022-11-19 07:37:22,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:22,414 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:22,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14627 states. [2022-11-19 07:37:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14627 to 14627. [2022-11-19 07:37:22,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14627 states, 14488 states have (on average 5.251587520706792) internal successors, (76085), 14626 states have internal predecessors, (76085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14627 states to 14627 states and 76085 transitions. [2022-11-19 07:37:22,754 INFO L78 Accepts]: Start accepts. Automaton has 14627 states and 76085 transitions. Word has length 8 [2022-11-19 07:37:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:22,755 INFO L495 AbstractCegarLoop]: Abstraction has 14627 states and 76085 transitions. [2022-11-19 07:37:22,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14627 states and 76085 transitions. [2022-11-19 07:37:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:22,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:22,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:22,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:22,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:22,956 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash 708530194, now seen corresponding path program 1 times [2022-11-19 07:37:22,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:22,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395857980] [2022-11-19 07:37:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:22,957 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 [2022-11-19 07:37:22,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:22,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:22,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 07:37:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:37:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:23,321 INFO L321 Elim1Store]: treesize reduction 300, result has 10.7 percent of original size [2022-11-19 07:37:23,321 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 8 case distinctions, treesize of input 60 treesize of output 77 [2022-11-19 07:37:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:24,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:24,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395857980] [2022-11-19 07:37:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395857980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:24,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:24,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357005717] [2022-11-19 07:37:24,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:24,114 INFO L87 Difference]: Start difference. First operand 14627 states and 76085 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:24,391 INFO L93 Difference]: Finished difference Result 14625 states and 76079 transitions. [2022-11-19 07:37:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-19 07:37:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:24,455 INFO L225 Difference]: With dead ends: 14625 [2022-11-19 07:37:24,456 INFO L226 Difference]: Without dead ends: 14625 [2022-11-19 07:37:24,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:24,456 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:24,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14625 states. [2022-11-19 07:37:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14625 to 14625. [2022-11-19 07:37:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14625 states, 14486 states have (on average 5.251898384647245) internal successors, (76079), 14624 states have internal predecessors, (76079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14625 states to 14625 states and 76079 transitions. [2022-11-19 07:37:24,814 INFO L78 Accepts]: Start accepts. Automaton has 14625 states and 76079 transitions. Word has length 8 [2022-11-19 07:37:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:24,815 INFO L495 AbstractCegarLoop]: Abstraction has 14625 states and 76079 transitions. [2022-11-19 07:37:24,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 14625 states and 76079 transitions. [2022-11-19 07:37:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:37:24,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:24,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:24,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:25,016 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 708530196, now seen corresponding path program 1 times [2022-11-19 07:37:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411026947] [2022-11-19 07:37:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:25,017 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 [2022-11-19 07:37:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:25,019 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:25,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:37:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:25,544 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:25,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:25,584 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:25,584 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 39 treesize of output 35 [2022-11-19 07:37:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:25,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:25,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411026947] [2022-11-19 07:37:25,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411026947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:25,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:25,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568843146] [2022-11-19 07:37:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:25,759 INFO L87 Difference]: Start difference. First operand 14625 states and 76079 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:26,043 INFO L93 Difference]: Finished difference Result 14623 states and 76073 transitions. [2022-11-19 07:37:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-19 07:37:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:26,303 INFO L225 Difference]: With dead ends: 14623 [2022-11-19 07:37:26,303 INFO L226 Difference]: Without dead ends: 14623 [2022-11-19 07:37:26,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:26,304 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:26,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14623 states. [2022-11-19 07:37:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14623 to 14623. [2022-11-19 07:37:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14623 states, 14484 states have (on average 5.2522093344380005) internal successors, (76073), 14622 states have internal predecessors, (76073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14623 states to 14623 states and 76073 transitions. [2022-11-19 07:37:26,630 INFO L78 Accepts]: Start accepts. Automaton has 14623 states and 76073 transitions. Word has length 8 [2022-11-19 07:37:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:26,630 INFO L495 AbstractCegarLoop]: Abstraction has 14623 states and 76073 transitions. [2022-11-19 07:37:26,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-19 07:37:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14623 states and 76073 transitions. [2022-11-19 07:37:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:26,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:26,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:26,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:26,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:26,831 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash 235234547, now seen corresponding path program 1 times [2022-11-19 07:37:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:26,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482373440] [2022-11-19 07:37:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:26,832 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 [2022-11-19 07:37:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:26,833 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:26,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:37:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:27,224 INFO L321 Elim1Store]: treesize reduction 320, result has 10.1 percent of original size [2022-11-19 07:37:27,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 88 [2022-11-19 07:37:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:37:27,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:27,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:27,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482373440] [2022-11-19 07:37:27,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482373440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:28,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:28,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:28,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619729058] [2022-11-19 07:37:28,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:28,001 INFO L87 Difference]: Start difference. First operand 14623 states and 76073 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:28,264 INFO L93 Difference]: Finished difference Result 14622 states and 76072 transitions. [2022-11-19 07:37:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:28,561 INFO L225 Difference]: With dead ends: 14622 [2022-11-19 07:37:28,561 INFO L226 Difference]: Without dead ends: 14622 [2022-11-19 07:37:28,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:28,562 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:28,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14622 states. [2022-11-19 07:37:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14622 to 14622. [2022-11-19 07:37:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14622 states, 14484 states have (on average 5.252140292736813) internal successors, (76072), 14621 states have internal predecessors, (76072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14622 states to 14622 states and 76072 transitions. [2022-11-19 07:37:28,904 INFO L78 Accepts]: Start accepts. Automaton has 14622 states and 76072 transitions. Word has length 9 [2022-11-19 07:37:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:28,904 INFO L495 AbstractCegarLoop]: Abstraction has 14622 states and 76072 transitions. [2022-11-19 07:37:28,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 14622 states and 76072 transitions. [2022-11-19 07:37:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:28,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:28,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:28,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:29,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:29,110 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash 235234548, now seen corresponding path program 1 times [2022-11-19 07:37:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007440336] [2022-11-19 07:37:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:29,111 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 [2022-11-19 07:37:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:29,116 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:29,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:37:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:29,680 INFO L321 Elim1Store]: treesize reduction 73, result has 40.2 percent of original size [2022-11-19 07:37:29,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 56 [2022-11-19 07:37:29,727 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:37:29,727 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 52 treesize of output 46 [2022-11-19 07:37:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:30,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:30,648 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007440336] [2022-11-19 07:37:30,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007440336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:30,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207831232] [2022-11-19 07:37:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:30,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:37:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:37:30,650 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:37:30,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-19 07:37:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:37:31,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:31,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:31,568 INFO L321 Elim1Store]: treesize reduction 123, result has 29.7 percent of original size [2022-11-19 07:37:31,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 62 [2022-11-19 07:37:31,669 INFO L321 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2022-11-19 07:37:31,670 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 6567 treesize of output 6445 [2022-11-19 07:37:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:37:32,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:32,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207831232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:32,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:37:32,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:37:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834246701] [2022-11-19 07:37:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:32,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:32,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:37:32,647 INFO L87 Difference]: Start difference. First operand 14622 states and 76072 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:32,919 INFO L93 Difference]: Finished difference Result 14621 states and 76071 transitions. [2022-11-19 07:37:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:32,979 INFO L225 Difference]: With dead ends: 14621 [2022-11-19 07:37:32,979 INFO L226 Difference]: Without dead ends: 14621 [2022-11-19 07:37:32,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:37:32,980 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:32,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14621 states. [2022-11-19 07:37:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14621 to 14621. [2022-11-19 07:37:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14621 states, 14484 states have (on average 5.252071251035625) internal successors, (76071), 14620 states have internal predecessors, (76071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14621 states to 14621 states and 76071 transitions. [2022-11-19 07:37:33,510 INFO L78 Accepts]: Start accepts. Automaton has 14621 states and 76071 transitions. Word has length 9 [2022-11-19 07:37:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:33,510 INFO L495 AbstractCegarLoop]: Abstraction has 14621 states and 76071 transitions. [2022-11-19 07:37:33,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14621 states and 76071 transitions. [2022-11-19 07:37:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:33,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:33,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:33,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:33,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:33,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:37:33,912 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 235220500, now seen corresponding path program 1 times [2022-11-19 07:37:33,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:33,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619674500] [2022-11-19 07:37:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:33,913 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 [2022-11-19 07:37:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:33,914 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:33,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:37:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:34,284 INFO L321 Elim1Store]: treesize reduction 300, result has 10.7 percent of original size [2022-11-19 07:37:34,284 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 8 case distinctions, treesize of input 60 treesize of output 77 [2022-11-19 07:37:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:34,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:34,895 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619674500] [2022-11-19 07:37:34,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619674500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:34,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058833394] [2022-11-19 07:37:34,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:34,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:34,896 INFO L87 Difference]: Start difference. First operand 14621 states and 76071 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:35,159 INFO L93 Difference]: Finished difference Result 14619 states and 76065 transitions. [2022-11-19 07:37:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:35,224 INFO L225 Difference]: With dead ends: 14619 [2022-11-19 07:37:35,224 INFO L226 Difference]: Without dead ends: 14619 [2022-11-19 07:37:35,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:35,225 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:35,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14619 states. [2022-11-19 07:37:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14619 to 14619. [2022-11-19 07:37:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14482 states have (on average 5.252382267642591) internal successors, (76065), 14618 states have internal predecessors, (76065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 76065 transitions. [2022-11-19 07:37:35,865 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 76065 transitions. Word has length 9 [2022-11-19 07:37:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:35,865 INFO L495 AbstractCegarLoop]: Abstraction has 14619 states and 76065 transitions. [2022-11-19 07:37:35,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 76065 transitions. [2022-11-19 07:37:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:35,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:35,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:35,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:36,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:36,082 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash 235220502, now seen corresponding path program 1 times [2022-11-19 07:37:36,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:36,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379400345] [2022-11-19 07:37:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:36,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:36,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:36,084 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:36,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:37:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:36,596 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:36,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:36,635 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:36,635 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 39 treesize of output 35 [2022-11-19 07:37:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:36,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:36,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379400345] [2022-11-19 07:37:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379400345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:36,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:36,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633625259] [2022-11-19 07:37:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:36,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:36,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:36,838 INFO L87 Difference]: Start difference. First operand 14619 states and 76065 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:37,095 INFO L93 Difference]: Finished difference Result 14617 states and 76059 transitions. [2022-11-19 07:37:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:37,160 INFO L225 Difference]: With dead ends: 14617 [2022-11-19 07:37:37,160 INFO L226 Difference]: Without dead ends: 14617 [2022-11-19 07:37:37,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:37,161 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:37,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14617 states. [2022-11-19 07:37:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14617 to 14617. [2022-11-19 07:37:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14617 states, 14480 states have (on average 5.252693370165746) internal successors, (76059), 14616 states have internal predecessors, (76059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 76059 transitions. [2022-11-19 07:37:37,486 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 76059 transitions. Word has length 9 [2022-11-19 07:37:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:37,486 INFO L495 AbstractCegarLoop]: Abstraction has 14617 states and 76059 transitions. [2022-11-19 07:37:37,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 76059 transitions. [2022-11-19 07:37:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:37,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:37,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:37,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:37,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:37,688 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 238927201, now seen corresponding path program 1 times [2022-11-19 07:37:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:37,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352383630] [2022-11-19 07:37:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:37,689 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 [2022-11-19 07:37:37,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:37,690 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:37,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:37:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:38,078 INFO L321 Elim1Store]: treesize reduction 300, result has 10.7 percent of original size [2022-11-19 07:37:38,078 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 8 case distinctions, treesize of input 60 treesize of output 77 [2022-11-19 07:37:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:38,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:38,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352383630] [2022-11-19 07:37:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352383630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:38,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:38,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:38,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998267298] [2022-11-19 07:37:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:38,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:38,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:38,864 INFO L87 Difference]: Start difference. First operand 14617 states and 76059 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:39,135 INFO L93 Difference]: Finished difference Result 14615 states and 76053 transitions. [2022-11-19 07:37:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:39,195 INFO L225 Difference]: With dead ends: 14615 [2022-11-19 07:37:39,196 INFO L226 Difference]: Without dead ends: 14615 [2022-11-19 07:37:39,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:39,196 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:39,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14615 states. [2022-11-19 07:37:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14615 to 14615. [2022-11-19 07:37:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14478 states have (on average 5.253004558640696) internal successors, (76053), 14614 states have internal predecessors, (76053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 76053 transitions. [2022-11-19 07:37:39,525 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 76053 transitions. Word has length 9 [2022-11-19 07:37:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:39,525 INFO L495 AbstractCegarLoop]: Abstraction has 14615 states and 76053 transitions. [2022-11-19 07:37:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 76053 transitions. [2022-11-19 07:37:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:39,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:39,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:39,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:37:39,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:39,730 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash 238927203, now seen corresponding path program 1 times [2022-11-19 07:37:39,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:39,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141964152] [2022-11-19 07:37:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:39,731 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 [2022-11-19 07:37:39,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:39,732 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:39,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:37:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:39,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:39,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:40,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:40,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:40,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:40,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:40,293 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:40,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:40,332 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:40,333 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 39 treesize of output 35 [2022-11-19 07:37:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:40,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:40,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141964152] [2022-11-19 07:37:40,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141964152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:40,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:40,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:40,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748790581] [2022-11-19 07:37:40,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:40,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:40,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:40,509 INFO L87 Difference]: Start difference. First operand 14615 states and 76053 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:40,886 INFO L93 Difference]: Finished difference Result 14613 states and 76047 transitions. [2022-11-19 07:37:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:40,944 INFO L225 Difference]: With dead ends: 14613 [2022-11-19 07:37:40,944 INFO L226 Difference]: Without dead ends: 14613 [2022-11-19 07:37:40,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:40,945 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:40,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14613 states. [2022-11-19 07:37:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14613 to 14613. [2022-11-19 07:37:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14613 states, 14476 states have (on average 5.253315833103067) internal successors, (76047), 14612 states have internal predecessors, (76047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14613 states to 14613 states and 76047 transitions. [2022-11-19 07:37:41,262 INFO L78 Accepts]: Start accepts. Automaton has 14613 states and 76047 transitions. Word has length 9 [2022-11-19 07:37:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:41,262 INFO L495 AbstractCegarLoop]: Abstraction has 14613 states and 76047 transitions. [2022-11-19 07:37:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 14613 states and 76047 transitions. [2022-11-19 07:37:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:41,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:41,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:41,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:41,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:41,463 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:41,463 INFO L85 PathProgramCache]: Analyzing trace with hash 489597572, now seen corresponding path program 1 times [2022-11-19 07:37:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:41,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786550545] [2022-11-19 07:37:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:41,464 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 [2022-11-19 07:37:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:41,465 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:41,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:41,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:37:41,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:41,859 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2022-11-19 07:37:41,859 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 8 case distinctions, treesize of input 60 treesize of output 81 [2022-11-19 07:37:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:42,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:42,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786550545] [2022-11-19 07:37:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786550545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:42,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:42,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835903477] [2022-11-19 07:37:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:42,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:42,136 INFO L87 Difference]: Start difference. First operand 14613 states and 76047 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:42,396 INFO L93 Difference]: Finished difference Result 14615 states and 76059 transitions. [2022-11-19 07:37:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:42,459 INFO L225 Difference]: With dead ends: 14615 [2022-11-19 07:37:42,459 INFO L226 Difference]: Without dead ends: 14615 [2022-11-19 07:37:42,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:42,460 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:42,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14615 states. [2022-11-19 07:37:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14615 to 14615. [2022-11-19 07:37:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14478 states have (on average 5.253418980522172) internal successors, (76059), 14614 states have internal predecessors, (76059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 76059 transitions. [2022-11-19 07:37:42,996 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 76059 transitions. Word has length 9 [2022-11-19 07:37:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:42,996 INFO L495 AbstractCegarLoop]: Abstraction has 14615 states and 76059 transitions. [2022-11-19 07:37:42,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 76059 transitions. [2022-11-19 07:37:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:42,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:42,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:43,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:37:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:43,197 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 489597574, now seen corresponding path program 1 times [2022-11-19 07:37:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:43,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082655187] [2022-11-19 07:37:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:43,198 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 [2022-11-19 07:37:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:43,199 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:43,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:43,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:37:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:43,709 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:43,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:43,748 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:43,749 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 39 treesize of output 35 [2022-11-19 07:37:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:43,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:43,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082655187] [2022-11-19 07:37:43,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082655187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:43,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:43,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:43,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445670202] [2022-11-19 07:37:43,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:43,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:43,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:43,943 INFO L87 Difference]: Start difference. First operand 14615 states and 76059 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:44,195 INFO L93 Difference]: Finished difference Result 14615 states and 76057 transitions. [2022-11-19 07:37:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:44,250 INFO L225 Difference]: With dead ends: 14615 [2022-11-19 07:37:44,250 INFO L226 Difference]: Without dead ends: 14615 [2022-11-19 07:37:44,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:44,251 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:44,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14615 states. [2022-11-19 07:37:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14615 to 14615. [2022-11-19 07:37:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14478 states have (on average 5.253280839895013) internal successors, (76057), 14614 states have internal predecessors, (76057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 76057 transitions. [2022-11-19 07:37:44,814 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 76057 transitions. Word has length 9 [2022-11-19 07:37:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:44,814 INFO L495 AbstractCegarLoop]: Abstraction has 14615 states and 76057 transitions. [2022-11-19 07:37:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 76057 transitions. [2022-11-19 07:37:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:44,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:44,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:44,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:45,018 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash 489597446, now seen corresponding path program 1 times [2022-11-19 07:37:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:45,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924671137] [2022-11-19 07:37:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:45,019 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 [2022-11-19 07:37:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:45,019 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:45,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:37:45,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:45,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:45,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924671137] [2022-11-19 07:37:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924671137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:45,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:45,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:37:45,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054102354] [2022-11-19 07:37:45,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:45,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:37:45,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:37:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:37:45,279 INFO L87 Difference]: Start difference. First operand 14615 states and 76057 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) [2022-11-19 07:37:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:46,154 INFO L93 Difference]: Finished difference Result 20931 states and 108721 transitions. [2022-11-19 07:37:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:37:46,155 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 9 [2022-11-19 07:37:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:46,268 INFO L225 Difference]: With dead ends: 20931 [2022-11-19 07:37:46,268 INFO L226 Difference]: Without dead ends: 20931 [2022-11-19 07:37:46,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:37:46,269 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 199 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:46,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 12 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:37:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20931 states. [2022-11-19 07:37:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20931 to 17493. [2022-11-19 07:37:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17493 states, 17356 states have (on average 5.416628255358377) internal successors, (94011), 17492 states have internal predecessors, (94011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17493 states to 17493 states and 94011 transitions. [2022-11-19 07:37:47,106 INFO L78 Accepts]: Start accepts. Automaton has 17493 states and 94011 transitions. Word has length 9 [2022-11-19 07:37:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:47,107 INFO L495 AbstractCegarLoop]: Abstraction has 17493 states and 94011 transitions. [2022-11-19 07:37:47,107 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) [2022-11-19 07:37:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 17493 states and 94011 transitions. [2022-11-19 07:37:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:47,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:47,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:47,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:47,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:47,308 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash 489842111, now seen corresponding path program 1 times [2022-11-19 07:37:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629959515] [2022-11-19 07:37:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:47,310 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 [2022-11-19 07:37:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:47,311 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:47,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:47,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:37:47,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:47,937 INFO L321 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2022-11-19 07:37:47,938 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 5 case distinctions, treesize of input 23 treesize of output 80 [2022-11-19 07:37:47,973 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 734 treesize of output 726 [2022-11-19 07:37:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:48,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:37:48,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629959515] [2022-11-19 07:37:48,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629959515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1148074341] [2022-11-19 07:37:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:48,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:37:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:37:48,698 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:37:48,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-19 07:37:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:49,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:37:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:49,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:49,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:49,551 INFO L321 Elim1Store]: treesize reduction 187, result has 25.5 percent of original size [2022-11-19 07:37:49,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 74 [2022-11-19 07:37:49,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1094 treesize of output 1078 [2022-11-19 07:37:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:49,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:49,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1148074341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:49,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:37:49,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 07:37:49,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529004979] [2022-11-19 07:37:49,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:49,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:49,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:37:49,853 INFO L87 Difference]: Start difference. First operand 17493 states and 94011 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:50,153 INFO L93 Difference]: Finished difference Result 17493 states and 94017 transitions. [2022-11-19 07:37:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:50,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:50,238 INFO L225 Difference]: With dead ends: 17493 [2022-11-19 07:37:50,239 INFO L226 Difference]: Without dead ends: 17493 [2022-11-19 07:37:50,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:37:50,239 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:50,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17493 states. [2022-11-19 07:37:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17493 to 17493. [2022-11-19 07:37:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17493 states, 17356 states have (on average 5.41697395713298) internal successors, (94017), 17492 states have internal predecessors, (94017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17493 states to 17493 states and 94017 transitions. [2022-11-19 07:37:51,073 INFO L78 Accepts]: Start accepts. Automaton has 17493 states and 94017 transitions. Word has length 9 [2022-11-19 07:37:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:51,073 INFO L495 AbstractCegarLoop]: Abstraction has 17493 states and 94017 transitions. [2022-11-19 07:37:51,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17493 states and 94017 transitions. [2022-11-19 07:37:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:37:51,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:51,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:51,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-19 07:37:51,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:51,476 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash 489842112, now seen corresponding path program 1 times [2022-11-19 07:37:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851774539] [2022-11-19 07:37:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:51,478 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 [2022-11-19 07:37:51,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:51,479 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:51,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-19 07:37:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:37:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:51,882 INFO L321 Elim1Store]: treesize reduction 290, result has 11.0 percent of original size [2022-11-19 07:37:51,883 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 6 case distinctions, treesize of input 43 treesize of output 62 [2022-11-19 07:37:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:52,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:52,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851774539] [2022-11-19 07:37:52,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851774539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:52,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:52,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130445216] [2022-11-19 07:37:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:52,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:52,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:52,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:52,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:52,285 INFO L87 Difference]: Start difference. First operand 17493 states and 94017 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:52,581 INFO L93 Difference]: Finished difference Result 17491 states and 94007 transitions. [2022-11-19 07:37:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:37:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:52,663 INFO L225 Difference]: With dead ends: 17491 [2022-11-19 07:37:52,663 INFO L226 Difference]: Without dead ends: 17491 [2022-11-19 07:37:52,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:52,663 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17491 states. [2022-11-19 07:37:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17491 to 17491. [2022-11-19 07:37:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17491 states, 17354 states have (on average 5.417022012216203) internal successors, (94007), 17490 states have internal predecessors, (94007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17491 states to 17491 states and 94007 transitions. [2022-11-19 07:37:53,429 INFO L78 Accepts]: Start accepts. Automaton has 17491 states and 94007 transitions. Word has length 9 [2022-11-19 07:37:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:53,429 INFO L495 AbstractCegarLoop]: Abstraction has 17491 states and 94007 transitions. [2022-11-19 07:37:53,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17491 states and 94007 transitions. [2022-11-19 07:37:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:37:53,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:53,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:53,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-19 07:37:53,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:53,631 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1297642068, now seen corresponding path program 1 times [2022-11-19 07:37:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545558851] [2022-11-19 07:37:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:53,632 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 [2022-11-19 07:37:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:53,633 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:53,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-19 07:37:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:37:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:54,070 INFO L321 Elim1Store]: treesize reduction 296, result has 11.9 percent of original size [2022-11-19 07:37:54,070 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 8 case distinctions, treesize of input 60 treesize of output 81 [2022-11-19 07:37:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:54,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:54,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:54,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545558851] [2022-11-19 07:37:54,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545558851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:54,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:54,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726348054] [2022-11-19 07:37:54,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:54,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:54,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:54,398 INFO L87 Difference]: Start difference. First operand 17491 states and 94007 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:37:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:54,676 INFO L93 Difference]: Finished difference Result 17486 states and 93987 transitions. [2022-11-19 07:37:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 07:37:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:54,767 INFO L225 Difference]: With dead ends: 17486 [2022-11-19 07:37:54,767 INFO L226 Difference]: Without dead ends: 17486 [2022-11-19 07:37:54,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:54,768 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:54,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17486 states. [2022-11-19 07:37:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17486 to 17486. [2022-11-19 07:37:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17486 states, 17349 states have (on average 5.417430399446654) internal successors, (93987), 17485 states have internal predecessors, (93987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17486 states to 17486 states and 93987 transitions. [2022-11-19 07:37:55,604 INFO L78 Accepts]: Start accepts. Automaton has 17486 states and 93987 transitions. Word has length 10 [2022-11-19 07:37:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 17486 states and 93987 transitions. [2022-11-19 07:37:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:37:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17486 states and 93987 transitions. [2022-11-19 07:37:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:37:55,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:55,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:55,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-19 07:37:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:55,806 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1297642066, now seen corresponding path program 1 times [2022-11-19 07:37:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:55,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083860439] [2022-11-19 07:37:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:55,806 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 [2022-11-19 07:37:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:55,807 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:55,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:37:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:56,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:56,366 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:37:56,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:37:56,412 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:37:56,412 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 39 treesize of output 35 [2022-11-19 07:37:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:56,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:56,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083860439] [2022-11-19 07:37:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083860439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156170758] [2022-11-19 07:37:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:56,609 INFO L87 Difference]: Start difference. First operand 17486 states and 93987 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:37:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:56,908 INFO L93 Difference]: Finished difference Result 17481 states and 93967 transitions. [2022-11-19 07:37:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:56,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 07:37:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:56,994 INFO L225 Difference]: With dead ends: 17481 [2022-11-19 07:37:56,994 INFO L226 Difference]: Without dead ends: 17481 [2022-11-19 07:37:56,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:56,994 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:56,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17481 states. [2022-11-19 07:37:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17481 to 17481. [2022-11-19 07:37:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17481 states, 17344 states have (on average 5.417839022140221) internal successors, (93967), 17480 states have internal predecessors, (93967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:37:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17481 states to 17481 states and 93967 transitions. [2022-11-19 07:37:57,940 INFO L78 Accepts]: Start accepts. Automaton has 17481 states and 93967 transitions. Word has length 10 [2022-11-19 07:37:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:57,940 INFO L495 AbstractCegarLoop]: Abstraction has 17481 states and 93967 transitions. [2022-11-19 07:37:57,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:37:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 17481 states and 93967 transitions. [2022-11-19 07:37:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:37:57,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:57,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:57,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:37:58,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:37:58,142 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:37:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1298106107, now seen corresponding path program 1 times [2022-11-19 07:37:58,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:37:58,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607047375] [2022-11-19 07:37:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:58,143 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 [2022-11-19 07:37:58,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:37:58,144 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:37:58,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:37:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:37:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:58,584 INFO L321 Elim1Store]: treesize reduction 300, result has 10.7 percent of original size [2022-11-19 07:37:58,585 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 8 case distinctions, treesize of input 60 treesize of output 77 [2022-11-19 07:37:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:37:59,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:59,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:37:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607047375] [2022-11-19 07:37:59,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607047375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:59,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:59,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:37:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680790485] [2022-11-19 07:37:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:37:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:59,334 INFO L87 Difference]: Start difference. First operand 17481 states and 93967 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:37:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:59,658 INFO L93 Difference]: Finished difference Result 17479 states and 93961 transitions. [2022-11-19 07:37:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 07:37:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:59,753 INFO L225 Difference]: With dead ends: 17479 [2022-11-19 07:37:59,754 INFO L226 Difference]: Without dead ends: 17479 [2022-11-19 07:37:59,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:59,754 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:59,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:37:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17479 states. [2022-11-19 07:38:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17479 to 17479. [2022-11-19 07:38:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17479 states, 17342 states have (on average 5.41811786414485) internal successors, (93961), 17478 states have internal predecessors, (93961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:38:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17479 states to 17479 states and 93961 transitions. [2022-11-19 07:38:00,620 INFO L78 Accepts]: Start accepts. Automaton has 17479 states and 93961 transitions. Word has length 10 [2022-11-19 07:38:00,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:00,621 INFO L495 AbstractCegarLoop]: Abstraction has 17479 states and 93961 transitions. [2022-11-19 07:38:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:38:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 17479 states and 93961 transitions. [2022-11-19 07:38:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:38:00,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:00,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:00,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:38:00,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:38:00,826 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:38:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:00,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1298106105, now seen corresponding path program 1 times [2022-11-19 07:38:00,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:38:00,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295130675] [2022-11-19 07:38:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:00,827 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 [2022-11-19 07:38:00,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:38:00,828 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:38:00,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:38:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:38:01,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:01,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:01,417 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:38:01,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:38:01,457 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:38:01,458 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 39 treesize of output 35 [2022-11-19 07:38:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:38:01,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:01,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:38:01,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295130675] [2022-11-19 07:38:01,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295130675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:01,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:01,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:38:01,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571223960] [2022-11-19 07:38:01,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:01,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:01,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:38:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:01,660 INFO L87 Difference]: Start difference. First operand 17479 states and 93961 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:38:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:01,953 INFO L93 Difference]: Finished difference Result 17477 states and 93955 transitions. [2022-11-19 07:38:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 07:38:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:02,034 INFO L225 Difference]: With dead ends: 17477 [2022-11-19 07:38:02,034 INFO L226 Difference]: Without dead ends: 17477 [2022-11-19 07:38:02,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:02,034 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:02,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:38:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17477 states. [2022-11-19 07:38:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17477 to 17477. [2022-11-19 07:38:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17340 states have (on average 5.418396770472895) internal successors, (93955), 17476 states have internal predecessors, (93955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:38:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 93955 transitions. [2022-11-19 07:38:02,916 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 93955 transitions. Word has length 10 [2022-11-19 07:38:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:02,916 INFO L495 AbstractCegarLoop]: Abstraction has 17477 states and 93955 transitions. [2022-11-19 07:38:02,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:38:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 93955 transitions. [2022-11-19 07:38:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:38:02,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:02,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:02,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:38:03,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:38:03,118 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:38:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1183193323, now seen corresponding path program 1 times [2022-11-19 07:38:03,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:38:03,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183012592] [2022-11-19 07:38:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:03,119 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 [2022-11-19 07:38:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:38:03,120 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:38:03,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:38:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:38:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:03,538 INFO L321 Elim1Store]: treesize reduction 300, result has 10.7 percent of original size [2022-11-19 07:38:03,538 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 8 case distinctions, treesize of input 60 treesize of output 77 [2022-11-19 07:38:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:38:04,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:04,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:38:04,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183012592] [2022-11-19 07:38:04,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183012592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:04,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:04,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:38:04,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934679343] [2022-11-19 07:38:04,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:38:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:04,204 INFO L87 Difference]: Start difference. First operand 17477 states and 93955 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:38:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:04,485 INFO L93 Difference]: Finished difference Result 17475 states and 93947 transitions. [2022-11-19 07:38:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 07:38:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:04,566 INFO L225 Difference]: With dead ends: 17475 [2022-11-19 07:38:04,566 INFO L226 Difference]: Without dead ends: 17475 [2022-11-19 07:38:04,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:04,567 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:04,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:38:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17475 states. [2022-11-19 07:38:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17475 to 17475. [2022-11-19 07:38:05,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17475 states, 17338 states have (on average 5.418560387587957) internal successors, (93947), 17474 states have internal predecessors, (93947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:38:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17475 states to 17475 states and 93947 transitions. [2022-11-19 07:38:05,364 INFO L78 Accepts]: Start accepts. Automaton has 17475 states and 93947 transitions. Word has length 10 [2022-11-19 07:38:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:05,364 INFO L495 AbstractCegarLoop]: Abstraction has 17475 states and 93947 transitions. [2022-11-19 07:38:05,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:38:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17475 states and 93947 transitions. [2022-11-19 07:38:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:38:05,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:05,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:05,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:38:05,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:38:05,565 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-19 07:38:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1183193321, now seen corresponding path program 1 times [2022-11-19 07:38:05,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:38:05,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75363849] [2022-11-19 07:38:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:05,567 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 [2022-11-19 07:38:05,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:38:05,567 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:38:05,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a46072f6-f760-4365-bcd9-2962ceebbb5a/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:38:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:38:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:05,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:05,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:06,131 INFO L321 Elim1Store]: treesize reduction 102, result has 35.0 percent of original size [2022-11-19 07:38:06,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 62 [2022-11-19 07:38:06,170 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:38:06,171 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 39 treesize of output 35 [2022-11-19 07:38:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:38:06,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:06,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:38:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75363849] [2022-11-19 07:38:06,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75363849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:06,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:38:06,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:38:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801346355] [2022-11-19 07:38:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:06,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:38:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:38:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:38:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:06,360 INFO L87 Difference]: Start difference. First operand 17475 states and 93947 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 07:38:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:06,651 INFO L93 Difference]: Finished difference Result 17473 states and 93939 transitions. [2022-11-19 07:38:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:38:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 07:38:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:06,744 INFO L225 Difference]: With dead ends: 17473 [2022-11-19 07:38:06,744 INFO L226 Difference]: Without dead ends: 17473 [2022-11-19 07:38:06,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:38:06,745 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:06,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:38:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17473 states.