./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh --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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- 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-2329fc7 [2022-12-14 10:25:13,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:25:13,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:25:13,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:25:13,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:25:13,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:25:13,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:25:13,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:25:13,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:25:13,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:25:13,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:25:13,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:25:13,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:25:13,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:25:13,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:25:13,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:25:13,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:25:13,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:25:13,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:25:13,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:25:13,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:25:13,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:25:13,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:25:13,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:25:13,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:25:13,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:25:13,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:25:13,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:25:13,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:25:13,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:25:13,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:25:13,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:25:13,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:25:13,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:25:13,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:25:13,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:25:13,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:25:13,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:25:13,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:25:13,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:25:13,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:25:13,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 10:25:13,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:25:13,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:25:13,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:25:13,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:25:13,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:25:13,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:25:13,815 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:25:13,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:25:13,815 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:25:13,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:25:13,816 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:25:13,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:25:13,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:25:13,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:25:13,816 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:25:13,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:25:13,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:25:13,817 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:25:13,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:25:13,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:25:13,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:25:13,818 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:25:13,819 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:25:13,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:25:13,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:25:13,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:25:13,819 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:25:13,820 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:25:13,820 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:25:13,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:25:13,820 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:25:13,820 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:25:13,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:25:13,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:25:13,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:25:13,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:25:13,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:25:13,821 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:25:13,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:25:13,822 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:25:13,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:25:13,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:25:13,822 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_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2022-12-14 10:25:14,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:25:14,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:25:14,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:25:14,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:25:14,052 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:25:14,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-12-14 10:25:16,685 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:25:16,811 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:25:16,811 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-12-14 10:25:16,817 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data/1e034c8e6/ee849df3236843399ead109f93bcdda8/FLAG34ea86160 [2022-12-14 10:25:16,827 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data/1e034c8e6/ee849df3236843399ead109f93bcdda8 [2022-12-14 10:25:16,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:25:16,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:25:16,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:25:16,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:25:16,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:25:16,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:25:16" (1/1) ... [2022-12-14 10:25:16,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77982b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:16, skipping insertion in model container [2022-12-14 10:25:16,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:25:16" (1/1) ... [2022-12-14 10:25:16,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:25:16,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:25:16,996 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-12-14 10:25:17,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:25:17,014 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) [2022-12-14 10:25:17,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46327c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:17, skipping insertion in model container [2022-12-14 10:25:17,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:25:17,015 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 10:25:17,016 INFO L158 Benchmark]: Toolchain (without parser) took 185.34ms. Allocated memory is still 136.3MB. Free memory was 97.1MB in the beginning and 87.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:25:17,017 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 136.3MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:25:17,017 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.77ms. Allocated memory is still 136.3MB. Free memory was 96.7MB in the beginning and 87.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:25:17,018 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 136.3MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.77ms. Allocated memory is still 136.3MB. Free memory was 96.7MB in the beginning and 87.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh --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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- 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-2329fc7 [2022-12-14 10:25:18,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:25:18,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:25:18,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:25:18,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:25:18,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:25:18,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:25:18,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:25:18,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:25:18,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:25:18,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:25:18,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:25:18,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:25:18,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:25:18,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:25:18,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:25:18,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:25:18,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:25:18,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:25:18,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:25:18,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:25:18,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:25:18,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:25:18,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:25:18,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:25:18,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:25:18,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:25:18,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:25:18,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:25:18,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:25:18,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:25:18,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:25:18,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:25:18,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:25:18,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:25:18,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:25:18,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:25:18,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:25:18,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:25:18,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:25:18,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:25:18,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 10:25:18,383 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:25:18,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:25:18,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:25:18,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:25:18,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:25:18,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:25:18,384 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:25:18,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:25:18,384 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:25:18,384 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:25:18,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:25:18,385 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:25:18,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:25:18,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:25:18,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:25:18,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:25:18,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:25:18,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:25:18,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:25:18,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:25:18,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:25:18,388 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:25:18,388 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:25:18,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:25:18,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:25:18,388 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_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2022-12-14 10:25:18,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:25:18,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:25:18,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:25:18,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:25:18,608 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:25:18,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-12-14 10:25:21,175 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:25:21,373 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:25:21,374 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-12-14 10:25:21,381 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data/fe7d232ae/caa37a53d82b45ae81143700bb6f9cc0/FLAGd390edcfd [2022-12-14 10:25:21,734 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/data/fe7d232ae/caa37a53d82b45ae81143700bb6f9cc0 [2022-12-14 10:25:21,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:25:21,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:25:21,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:25:21,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:25:21,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:25:21,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:21,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b3cf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21, skipping insertion in model container [2022-12-14 10:25:21,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:21,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:25:21,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:25:21,901 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-12-14 10:25:21,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:25:21,924 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 10:25:21,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:25:21,943 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-12-14 10:25:21,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:25:21,953 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:25:21,972 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-12-14 10:25:21,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:25:21,994 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:25:21,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21 WrapperNode [2022-12-14 10:25:21,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:25:21,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:25:21,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:25:21,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:25:22,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,033 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 259 [2022-12-14 10:25:22,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:25:22,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:25:22,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:25:22,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:25:22,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:25:22,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:25:22,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:25:22,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:25:22,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (1/1) ... [2022-12-14 10:25:22,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:25:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:25:22,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:25:22,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:25:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:25:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 10:25:22,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 10:25:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 10:25:22,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 10:25:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:25:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:25:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:25:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 10:25:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:25:22,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:25:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:25:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 10:25:22,125 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 10:25:22,212 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:25:22,214 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:25:22,737 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:25:22,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:25:22,748 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 10:25:22,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:25:22 BoogieIcfgContainer [2022-12-14 10:25:22,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:25:22,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:25:22,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:25:22,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:25:22,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:25:21" (1/3) ... [2022-12-14 10:25:22,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b807487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:25:22, skipping insertion in model container [2022-12-14 10:25:22,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:25:21" (2/3) ... [2022-12-14 10:25:22,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b807487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:25:22, skipping insertion in model container [2022-12-14 10:25:22,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:25:22" (3/3) ... [2022-12-14 10:25:22,759 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2022-12-14 10:25:22,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:25:22,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-12-14 10:25:22,777 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 10:25:22,878 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 10:25:22,912 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:25:22,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 404 transitions, 824 flow [2022-12-14 10:25:22,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 404 transitions, 824 flow [2022-12-14 10:25:22,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 404 transitions, 824 flow [2022-12-14 10:25:23,065 INFO L130 PetriNetUnfolder]: 28/402 cut-off events. [2022-12-14 10:25:23,066 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 10:25:23,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 402 events. 28/402 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1030 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2022-12-14 10:25:23,101 INFO L119 LiptonReduction]: Number of co-enabled transitions 40920 [2022-12-14 10:25:59,725 INFO L134 LiptonReduction]: Checked pairs total: 38124 [2022-12-14 10:25:59,726 INFO L136 LiptonReduction]: Total number of compositions: 515 [2022-12-14 10:25:59,733 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 44 transitions, 104 flow [2022-12-14 10:25:59,771 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 402 states, 222 states have (on average 4.824324324324325) internal successors, (1071), 401 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:25:59,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:25:59,793 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;@1157736, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:25:59,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-12-14 10:25:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 402 states, 222 states have (on average 4.824324324324325) internal successors, (1071), 401 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:25:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:25:59,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:25:59,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:25:59,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:25:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:25:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 54997, now seen corresponding path program 1 times [2022-12-14 10:25:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:25:59,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510322530] [2022-12-14 10:25:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:25:59,814 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 [2022-12-14 10:25:59,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:25:59,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:25:59,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:25:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:25:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:25:59,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:25:59,949 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 10:25:59,950 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 10:25:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:25:59,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:25:59,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:25:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510322530] [2022-12-14 10:25:59,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510322530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:25:59,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:25:59,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:25:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263155226] [2022-12-14 10:25:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:25:59,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:25:59,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:25:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:25:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:00,002 INFO L87 Difference]: Start difference. First operand has 402 states, 222 states have (on average 4.824324324324325) internal successors, (1071), 401 states have internal predecessors, (1071), 0 states have call successors, (0), 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) [2022-12-14 10:26:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:00,163 INFO L93 Difference]: Finished difference Result 144 states and 373 transitions. [2022-12-14 10:26:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:26:00,164 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 [2022-12-14 10:26:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:00,172 INFO L225 Difference]: With dead ends: 144 [2022-12-14 10:26:00,172 INFO L226 Difference]: Without dead ends: 144 [2022-12-14 10:26:00,173 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 [2022-12-14 10:26:00,176 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:00,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:26:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-14 10:26:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-12-14 10:26:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 102 states have (on average 3.656862745098039) internal successors, (373), 143 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2022-12-14 10:26:00,216 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 2 [2022-12-14 10:26:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:00,216 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2022-12-14 10:26:00,217 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) [2022-12-14 10:26:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2022-12-14 10:26:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:26:00,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:00,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:26:00,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:00,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:00,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash 54998, now seen corresponding path program 1 times [2022-12-14 10:26:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:00,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838329747] [2022-12-14 10:26:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:00,427 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 [2022-12-14 10:26:00,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:00,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:00,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:26:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:00,609 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:00,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:00,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:00,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:00,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838329747] [2022-12-14 10:26:00,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838329747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:00,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:00,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:26:00,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594171004] [2022-12-14 10:26:00,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:00,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:26:00,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:26:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:00,638 INFO L87 Difference]: Start difference. First operand 144 states and 373 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) [2022-12-14 10:26:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:00,992 INFO L93 Difference]: Finished difference Result 286 states and 744 transitions. [2022-12-14 10:26:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:26:00,993 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 [2022-12-14 10:26:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:00,996 INFO L225 Difference]: With dead ends: 286 [2022-12-14 10:26:00,996 INFO L226 Difference]: Without dead ends: 286 [2022-12-14 10:26:00,996 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 [2022-12-14 10:26:00,997 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:00,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:26:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-12-14 10:26:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 145. [2022-12-14 10:26:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 103 states have (on average 3.6601941747572817) internal successors, (377), 144 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2022-12-14 10:26:01,006 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 2 [2022-12-14 10:26:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:01,006 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2022-12-14 10:26:01,007 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) [2022-12-14 10:26:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2022-12-14 10:26:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:26:01,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:01,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:26:01,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 10:26:01,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:01,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash 55479, now seen corresponding path program 1 times [2022-12-14 10:26:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:01,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861481128] [2022-12-14 10:26:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:01,213 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 [2022-12-14 10:26:01,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:01,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:01,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:01,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:26:01,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:01,294 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 10:26:01,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-14 10:26:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:01,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:01,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861481128] [2022-12-14 10:26:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861481128] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:01,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:01,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:26:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892102930] [2022-12-14 10:26:01,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:01,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:26:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:26:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:01,330 INFO L87 Difference]: Start difference. First operand 145 states and 377 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) [2022-12-14 10:26:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:01,506 INFO L93 Difference]: Finished difference Result 120 states and 299 transitions. [2022-12-14 10:26:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:26:01,507 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 [2022-12-14 10:26:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:01,508 INFO L225 Difference]: With dead ends: 120 [2022-12-14 10:26:01,508 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 10:26:01,508 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 [2022-12-14 10:26:01,509 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:01,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:26:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 10:26:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-12-14 10:26:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 3.397727272727273) internal successors, (299), 119 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2022-12-14 10:26:01,514 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 2 [2022-12-14 10:26:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:01,514 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2022-12-14 10:26:01,515 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) [2022-12-14 10:26:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2022-12-14 10:26:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:26:01,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:01,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:26:01,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:26:01,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:01,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash 55480, now seen corresponding path program 1 times [2022-12-14 10:26:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167526458] [2022-12-14 10:26:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:01,721 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 [2022-12-14 10:26:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:01,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:01,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:26:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:01,886 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:26:01,886 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 10:26:01,895 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 10 treesize of output 8 [2022-12-14 10:26:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:01,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:01,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:01,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167526458] [2022-12-14 10:26:01,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167526458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:01,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:01,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:26:01,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233604252] [2022-12-14 10:26:01,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:01,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:26:01,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:26:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:01,929 INFO L87 Difference]: Start difference. First operand 120 states and 299 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) [2022-12-14 10:26:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:02,104 INFO L93 Difference]: Finished difference Result 95 states and 221 transitions. [2022-12-14 10:26:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:26:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 10:26:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:02,106 INFO L225 Difference]: With dead ends: 95 [2022-12-14 10:26:02,106 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 10:26:02,106 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 [2022-12-14 10:26:02,107 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:26:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 10:26:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-12-14 10:26:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 3.0273972602739727) internal successors, (221), 94 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 221 transitions. [2022-12-14 10:26:02,113 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 221 transitions. Word has length 2 [2022-12-14 10:26:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:02,114 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 221 transitions. [2022-12-14 10:26:02,114 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) [2022-12-14 10:26:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 221 transitions. [2022-12-14 10:26:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:26:02,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:02,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:26:02,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:02,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:02,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1716939, now seen corresponding path program 1 times [2022-12-14 10:26:02,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:02,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358175240] [2022-12-14 10:26:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:02,316 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 [2022-12-14 10:26:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:02,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:02,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:26:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:02,439 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:02,439 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:02,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:02,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358175240] [2022-12-14 10:26:02,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358175240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:02,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819485441] [2022-12-14 10:26:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:02,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:26:02,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:26:02,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 10:26:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:26:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:02,833 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:02,833 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:02,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:02,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819485441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621324803] [2022-12-14 10:26:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:02,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:02,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:26:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:26:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:03,024 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:03,025 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:03,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:03,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621324803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:03,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:26:03,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 10:26:03,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81085726] [2022-12-14 10:26:03,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:26:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:26:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:26:03,187 INFO L87 Difference]: Start difference. First operand 95 states and 221 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) [2022-12-14 10:26:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:04,312 INFO L93 Difference]: Finished difference Result 371 states and 872 transitions. [2022-12-14 10:26:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:26:04,313 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 [2022-12-14 10:26:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:04,316 INFO L225 Difference]: With dead ends: 371 [2022-12-14 10:26:04,316 INFO L226 Difference]: Without dead ends: 371 [2022-12-14 10:26:04,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:26:04,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:04,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:26:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-12-14 10:26:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 98. [2022-12-14 10:26:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 2.986842105263158) internal successors, (227), 97 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 227 transitions. [2022-12-14 10:26:04,325 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 227 transitions. Word has length 3 [2022-12-14 10:26:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:04,325 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 227 transitions. [2022-12-14 10:26:04,325 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) [2022-12-14 10:26:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 227 transitions. [2022-12-14 10:26:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:26:04,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:04,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:26:04,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:26:04,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:26:04,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 10:26:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:04,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash 53352975, now seen corresponding path program 1 times [2022-12-14 10:26:04,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:04,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010544759] [2022-12-14 10:26:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:04,931 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 [2022-12-14 10:26:04,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:04,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:04,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 10:26:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:05,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:26:05,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:05,038 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-14 10:26:05,038 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-14 10:26:05,045 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 26 treesize of output 24 [2022-12-14 10:26:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:05,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:05,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:05,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010544759] [2022-12-14 10:26:05,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010544759] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:05,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:05,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:26:05,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159284071] [2022-12-14 10:26:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:26:05,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:26:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:05,070 INFO L87 Difference]: Start difference. First operand 98 states and 227 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:05,178 INFO L93 Difference]: Finished difference Result 88 states and 206 transitions. [2022-12-14 10:26:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:26:05,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:26:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:05,179 INFO L225 Difference]: With dead ends: 88 [2022-12-14 10:26:05,179 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:26:05,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:05,180 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:05,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:26:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:26:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 10:26:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 2.861111111111111) internal successors, (206), 87 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 206 transitions. [2022-12-14 10:26:05,183 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 206 transitions. Word has length 4 [2022-12-14 10:26:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:05,183 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 206 transitions. [2022-12-14 10:26:05,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 206 transitions. [2022-12-14 10:26:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:26:05,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:05,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:26:05,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 10:26:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:05,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:05,386 INFO L85 PathProgramCache]: Analyzing trace with hash 53352976, now seen corresponding path program 1 times [2022-12-14 10:26:05,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:05,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812835245] [2022-12-14 10:26:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:05,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:05,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:05,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:05,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:26:05,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:05,473 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 10:26:05,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-14 10:26:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:05,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:05,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:05,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812835245] [2022-12-14 10:26:05,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812835245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:05,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:05,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:26:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968922893] [2022-12-14 10:26:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:26:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:26:05,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:05,489 INFO L87 Difference]: Start difference. First operand 88 states and 206 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:05,591 INFO L93 Difference]: Finished difference Result 78 states and 185 transitions. [2022-12-14 10:26:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:26:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:26:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:05,593 INFO L225 Difference]: With dead ends: 78 [2022-12-14 10:26:05,593 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 10:26:05,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:26:05,594 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:05,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:26:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 10:26:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-12-14 10:26:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 2.7205882352941178) internal successors, (185), 77 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 185 transitions. [2022-12-14 10:26:05,596 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 185 transitions. Word has length 4 [2022-12-14 10:26:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:05,597 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 185 transitions. [2022-12-14 10:26:05,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 185 transitions. [2022-12-14 10:26:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:26:05,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:05,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:26:05,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:05,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash 53352789, now seen corresponding path program 1 times [2022-12-14 10:26:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678007729] [2022-12-14 10:26:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:05,801 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 [2022-12-14 10:26:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:05,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:05,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:26:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:05,923 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 10:26:05,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 10:26:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:05,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:05,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678007729] [2022-12-14 10:26:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678007729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:05,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:05,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:26:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193851659] [2022-12-14 10:26:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:26:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:26:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:26:05,942 INFO L87 Difference]: Start difference. First operand 78 states and 185 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:06,066 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2022-12-14 10:26:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:26:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:26:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:06,067 INFO L225 Difference]: With dead ends: 56 [2022-12-14 10:26:06,067 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 10:26:06,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:26:06,068 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:06,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:26:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 10:26:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-14 10:26:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 2.549019607843137) internal successors, (130), 55 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2022-12-14 10:26:06,071 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 4 [2022-12-14 10:26:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:06,071 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2022-12-14 10:26:06,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2022-12-14 10:26:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:26:06,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:06,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:26:06,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:26:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:06,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 53352790, now seen corresponding path program 1 times [2022-12-14 10:26:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424921928] [2022-12-14 10:26:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:06,277 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 [2022-12-14 10:26:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:06,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:06,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 10:26:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:06,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:26:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:06,385 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:06,385 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:06,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:06,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424921928] [2022-12-14 10:26:06,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424921928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:06,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:06,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:26:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913556615] [2022-12-14 10:26:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:26:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:26:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:26:06,456 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:06,674 INFO L93 Difference]: Finished difference Result 96 states and 228 transitions. [2022-12-14 10:26:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:26:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:26:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:06,675 INFO L225 Difference]: With dead ends: 96 [2022-12-14 10:26:06,675 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 10:26:06,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:26:06,676 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:06,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:26:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 10:26:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2022-12-14 10:26:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2022-12-14 10:26:06,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 4 [2022-12-14 10:26:06,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:06,678 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2022-12-14 10:26:06,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2022-12-14 10:26:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:26:06,679 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:06,679 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 10:26:06,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 10:26:06,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:06,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -378360810, now seen corresponding path program 2 times [2022-12-14 10:26:06,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:06,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496495691] [2022-12-14 10:26:06,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:26:06,883 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 [2022-12-14 10:26:06,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:06,886 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:06,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 10:26:06,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:26:06,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:26:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:07,039 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:07,040 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:07,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:07,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496495691] [2022-12-14 10:26:07,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496495691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001456106] [2022-12-14 10:26:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:26:07,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:26:07,742 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:26:07,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 10:26:07,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:26:07,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:26:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:07,918 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:07,918 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:08,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:08,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001456106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104426119] [2022-12-14 10:26:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:26:08,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:08,899 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:08,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:26:08,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:26:08,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:08,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:26:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:09,033 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:09,033 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:09,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:09,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104426119] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:09,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:26:09,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 10:26:09,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004127625] [2022-12-14 10:26:09,227 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:26:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:09,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:26:09,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:26:09,228 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:13,013 INFO L93 Difference]: Finished difference Result 583 states and 1554 transitions. [2022-12-14 10:26:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:26:13,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:26:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:13,017 INFO L225 Difference]: With dead ends: 583 [2022-12-14 10:26:13,017 INFO L226 Difference]: Without dead ends: 583 [2022-12-14 10:26:13,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:26:13,018 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 756 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:13,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 0 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 10:26:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-12-14 10:26:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 70. [2022-12-14 10:26:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 2.723076923076923) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2022-12-14 10:26:13,022 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 6 [2022-12-14 10:26:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:13,023 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2022-12-14 10:26:13,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2022-12-14 10:26:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:26:13,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:13,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:26:13,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:26:13,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:26:13,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:13,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:13,627 INFO L85 PathProgramCache]: Analyzing trace with hash -267361265, now seen corresponding path program 1 times [2022-12-14 10:26:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417210178] [2022-12-14 10:26:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:13,629 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 [2022-12-14 10:26:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:13,631 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:13,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:26:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:13,747 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:13,747 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:13,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:13,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:13,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417210178] [2022-12-14 10:26:13,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417210178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:13,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:13,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:26:13,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834674113] [2022-12-14 10:26:13,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:13,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:26:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:26:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:26:13,813 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:14,021 INFO L93 Difference]: Finished difference Result 100 states and 259 transitions. [2022-12-14 10:26:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:26:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:26:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:14,022 INFO L225 Difference]: With dead ends: 100 [2022-12-14 10:26:14,023 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 10:26:14,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:26:14,023 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:14,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:26:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 10:26:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-12-14 10:26:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 2.9240506329113924) internal successors, (231), 83 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 231 transitions. [2022-12-14 10:26:14,025 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 231 transitions. Word has length 6 [2022-12-14 10:26:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:14,026 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 231 transitions. [2022-12-14 10:26:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 231 transitions. [2022-12-14 10:26:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:26:14,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:14,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:26:14,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:14,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:14,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -267219219, now seen corresponding path program 1 times [2022-12-14 10:26:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835440742] [2022-12-14 10:26:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:14,230 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 [2022-12-14 10:26:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:14,233 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:14,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:26:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:26:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:14,388 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:14,389 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:14,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:26:14,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835440742] [2022-12-14 10:26:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835440742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:26:14,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:26:14,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:26:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280526684] [2022-12-14 10:26:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:26:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:26:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:26:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:26:14,467 INFO L87 Difference]: Start difference. First operand 84 states and 231 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:14,728 INFO L93 Difference]: Finished difference Result 103 states and 258 transitions. [2022-12-14 10:26:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:26:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:26:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:14,729 INFO L225 Difference]: With dead ends: 103 [2022-12-14 10:26:14,729 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 10:26:14,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:26:14,729 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:14,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:26:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 10:26:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2022-12-14 10:26:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 2.75) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 253 transitions. [2022-12-14 10:26:14,732 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 253 transitions. Word has length 6 [2022-12-14 10:26:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:14,732 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 253 transitions. [2022-12-14 10:26:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 253 transitions. [2022-12-14 10:26:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:26:14,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:14,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:26:14,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 10:26:14,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:14,934 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1266870370, now seen corresponding path program 1 times [2022-12-14 10:26:14,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:14,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651026047] [2022-12-14 10:26:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:14,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:14,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:14,940 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:14,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 10:26:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:26:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:15,083 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:15,083 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:26:15,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:26:15,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651026047] [2022-12-14 10:26:15,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651026047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515411473] [2022-12-14 10:26:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:15,660 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:15,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:26:15,661 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:26:15,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 10:26:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:26:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:15,844 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:15,844 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:16,036 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 17 treesize of output 13 [2022-12-14 10:26:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:16,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:16,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515411473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:16,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680494737] [2022-12-14 10:26:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:16,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:16,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:16,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:16,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 10:26:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:26:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:16,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:17,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680494737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:17,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:26:17,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 22 [2022-12-14 10:26:17,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289156264] [2022-12-14 10:26:17,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:17,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 10:26:17,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:17,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 10:26:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:26:17,078 INFO L87 Difference]: Start difference. First operand 97 states and 253 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:21,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:26:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:22,677 INFO L93 Difference]: Finished difference Result 308 states and 790 transitions. [2022-12-14 10:26:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:26:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:26:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:22,680 INFO L225 Difference]: With dead ends: 308 [2022-12-14 10:26:22,680 INFO L226 Difference]: Without dead ends: 308 [2022-12-14 10:26:22,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=366, Invalid=1274, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 10:26:22,680 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 532 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:22,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 0 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 10:26:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-12-14 10:26:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 228. [2022-12-14 10:26:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 2.9596412556053813) internal successors, (660), 227 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 660 transitions. [2022-12-14 10:26:22,686 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 660 transitions. Word has length 7 [2022-12-14 10:26:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:22,686 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 660 transitions. [2022-12-14 10:26:22,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 660 transitions. [2022-12-14 10:26:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:26:22,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:22,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:26:22,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 10:26:22,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 10:26:23,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:23,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:23,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash 613886752, now seen corresponding path program 1 times [2022-12-14 10:26:23,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:23,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510864534] [2022-12-14 10:26:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:23,291 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 [2022-12-14 10:26:23,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:23,294 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:23,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:26:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:23,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:23,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:23,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 375 [2022-12-14 10:26:23,822 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 375 treesize of output 371 [2022-12-14 10:26:23,829 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 371 treesize of output 367 [2022-12-14 10:26:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:24,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510864534] [2022-12-14 10:26:24,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510864534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [155583063] [2022-12-14 10:26:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:24,828 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:24,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:26:24,829 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:26:24,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 10:26:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:26:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:25,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:25,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:25,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 375 [2022-12-14 10:26:25,295 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 375 treesize of output 371 [2022-12-14 10:26:25,302 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 371 treesize of output 367 [2022-12-14 10:26:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:25,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [155583063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629166601] [2022-12-14 10:26:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:26:25,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:25,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:25,976 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:25,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 10:26:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:26:26,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:26:26,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:26,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:26,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:26,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 375 [2022-12-14 10:26:26,383 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 375 treesize of output 371 [2022-12-14 10:26:26,390 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 371 treesize of output 367 [2022-12-14 10:26:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:27,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629166601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:27,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:26:27,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 10:26:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541760872] [2022-12-14 10:26:27,113 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:26:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:26:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:26:27,114 INFO L87 Difference]: Start difference. First operand 228 states and 660 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:27,831 INFO L93 Difference]: Finished difference Result 250 states and 660 transitions. [2022-12-14 10:26:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:26:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 10:26:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:27,833 INFO L225 Difference]: With dead ends: 250 [2022-12-14 10:26:27,834 INFO L226 Difference]: Without dead ends: 250 [2022-12-14 10:26:27,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:26:27,834 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:27,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:26:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-14 10:26:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2022-12-14 10:26:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 2.858447488584475) internal successors, (626), 223 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 626 transitions. [2022-12-14 10:26:27,839 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 626 transitions. Word has length 8 [2022-12-14 10:26:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:27,839 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 626 transitions. [2022-12-14 10:26:27,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 626 transitions. [2022-12-14 10:26:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:26:27,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:27,840 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:26:27,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:28,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:26:28,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-12-14 10:26:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:28,442 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1700199253, now seen corresponding path program 2 times [2022-12-14 10:26:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:28,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934205036] [2022-12-14 10:26:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:26:28,445 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 [2022-12-14 10:26:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:28,447 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:28,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:28,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:26:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:26:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:28,604 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:28,604 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:28,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 88 [2022-12-14 10:26:28,861 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 7 treesize of output 5 [2022-12-14 10:26:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:28,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:29,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:29,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 375 [2022-12-14 10:26:29,143 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 375 treesize of output 371 [2022-12-14 10:26:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:31,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:26:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934205036] [2022-12-14 10:26:31,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934205036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140775697] [2022-12-14 10:26:31,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:26:31,031 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:26:31,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:26:31,032 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:26:31,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 10:26:31,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:26:31,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:26:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:31,279 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:31,280 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:31,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:31,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:31,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 88 [2022-12-14 10:26:31,474 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 7 treesize of output 5 [2022-12-14 10:26:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:31,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:31,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:31,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 375 [2022-12-14 10:26:31,681 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 375 treesize of output 371 [2022-12-14 10:26:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:33,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140775697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:33,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323045404] [2022-12-14 10:26:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:26:33,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:26:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:26:33,275 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:26:33,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 10:26:33,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:26:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:26:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:33,431 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:33,432 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:33,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:26:33,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 88 [2022-12-14 10:26:33,672 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 7 treesize of output 5 [2022-12-14 10:26:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:33,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:33,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:33,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 725 treesize of output 375 [2022-12-14 10:26:33,849 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 375 treesize of output 371 [2022-12-14 10:26:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:35,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323045404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:26:35,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:26:35,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-12-14 10:26:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702791002] [2022-12-14 10:26:35,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:26:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:26:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:26:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:26:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:26:35,273 INFO L87 Difference]: Start difference. First operand 224 states and 626 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:26:41,409 INFO L93 Difference]: Finished difference Result 916 states and 2602 transitions. [2022-12-14 10:26:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:26:41,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:26:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:26:41,414 INFO L225 Difference]: With dead ends: 916 [2022-12-14 10:26:41,414 INFO L226 Difference]: Without dead ends: 916 [2022-12-14 10:26:41,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:26:41,414 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 621 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:26:41,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 0 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 10:26:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-12-14 10:26:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 416. [2022-12-14 10:26:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 3.2530413625304138) internal successors, (1337), 415 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1337 transitions. [2022-12-14 10:26:41,426 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1337 transitions. Word has length 9 [2022-12-14 10:26:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:26:41,426 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1337 transitions. [2022-12-14 10:26:41,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:26:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1337 transitions. [2022-12-14 10:26:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:26:41,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:26:41,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:26:41,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 10:26:41,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 10:26:41,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:26:42,029 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:26:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:26:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1166583663, now seen corresponding path program 3 times [2022-12-14 10:26:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:26:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261504284] [2022-12-14 10:26:42,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:26:42,033 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 [2022-12-14 10:26:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:26:42,034 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:26:42,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:26:42,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:26:42,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:26:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:26:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:26:42,228 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:26:42,228 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:26:42,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 722 treesize of output 328 [2022-12-14 10:26:42,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:26:42,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 348 treesize of output 346 [2022-12-14 10:26:42,816 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 7 treesize of output 5 [2022-12-14 10:26:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:26:42,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:26:44,603 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-12-14 10:26:44,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1169 treesize of output 574 [2022-12-14 10:26:44,609 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 574 treesize of output 566 [2022-12-14 10:27:16,330 WARN L233 SmtUtils]: Spent 11.41s on a formula simplification. DAG size of input: 206 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:27:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:17,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:27:17,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261504284] [2022-12-14 10:27:17,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261504284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:27:17,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576621908] [2022-12-14 10:27:17,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:27:17,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:27:17,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:27:17,113 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:27:17,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 10:27:17,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:27:17,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:27:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:27:17,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:27:18,176 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 582 treesize of output 576 [2022-12-14 10:27:18,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 572 treesize of output 300 [2022-12-14 10:27:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:27:18,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:27:19,519 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-12-14 10:27:19,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1169 treesize of output 574 [2022-12-14 10:27:19,528 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 574 treesize of output 566 [2022-12-14 10:27:19,538 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 566 treesize of output 558 [2022-12-14 10:28:03,269 WARN L233 SmtUtils]: Spent 13.29s on a formula simplification. DAG size of input: 166 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:28:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:04,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [576621908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:28:04,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991054631] [2022-12-14 10:28:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:28:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:04,783 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:04,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 10:28:04,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:28:04,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:28:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:28:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:06,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-12-14 10:28:06,683 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 330 treesize of output 324 [2022-12-14 10:28:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:28:06,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:08,547 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-12-14 10:28:08,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1169 treesize of output 574 [2022-12-14 10:28:08,562 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 574 treesize of output 566 [2022-12-14 10:28:08,575 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 566 treesize of output 558 [2022-12-14 10:29:00,781 WARN L233 SmtUtils]: Spent 17.78s on a formula simplification. DAG size of input: 201 DAG size of output: 14 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:29:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:29:01,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991054631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:29:01,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:29:01,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 30 [2022-12-14 10:29:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114076771] [2022-12-14 10:29:01,876 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:29:01,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:29:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:29:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:29:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:29:01,877 INFO L87 Difference]: Start difference. First operand 416 states and 1337 transitions. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:29:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:29:18,829 INFO L93 Difference]: Finished difference Result 482 states and 1313 transitions. [2022-12-14 10:29:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:29:18,835 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2022-12-14 10:29:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:29:18,837 INFO L225 Difference]: With dead ends: 482 [2022-12-14 10:29:18,837 INFO L226 Difference]: Without dead ends: 476 [2022-12-14 10:29:18,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 81.4s TimeCoverageRelationStatistics Valid=457, Invalid=1523, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 10:29:18,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 522 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:29:18,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 0 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-12-14 10:29:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-12-14 10:29:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 408. [2022-12-14 10:29:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 2.955334987593052) internal successors, (1191), 407 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:29:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1191 transitions. [2022-12-14 10:29:18,847 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1191 transitions. Word has length 10 [2022-12-14 10:29:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:29:18,848 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 1191 transitions. [2022-12-14 10:29:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:29:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1191 transitions. [2022-12-14 10:29:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:29:18,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:29:18,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:29:18,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 10:29:19,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 10:29:19,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 10:29:19,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:29:19,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:29:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:29:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1435844196, now seen corresponding path program 4 times [2022-12-14 10:29:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:29:19,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247110767] [2022-12-14 10:29:19,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:29:19,454 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 [2022-12-14 10:29:19,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:29:19,457 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:29:19,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:29:19,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:29:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:29:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:29:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:29:19,800 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:29:19,800 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:29:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:29:21,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 722 treesize of output 328 [2022-12-14 10:29:21,397 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 7 treesize of output 5 [2022-12-14 10:29:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:29:21,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:29:25,201 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-12-14 10:29:25,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1205 treesize of output 610 [2022-12-14 10:29:25,215 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 610 treesize of output 602 [2022-12-14 10:30:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:30:01,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:30:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247110767] [2022-12-14 10:30:01,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247110767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:30:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593264674] [2022-12-14 10:30:01,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:30:01,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:30:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:30:01,963 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:30:01,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 10:30:02,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:30:02,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:30:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:30:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:30:02,387 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:30:02,388 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:30:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:03,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:04,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:04,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 722 treesize of output 328 [2022-12-14 10:30:04,100 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 7 treesize of output 5 [2022-12-14 10:30:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:30:04,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:30:06,177 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-12-14 10:30:06,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1205 treesize of output 610 [2022-12-14 10:30:06,190 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 610 treesize of output 602 [2022-12-14 10:30:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:30:43,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [593264674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:30:43,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979702457] [2022-12-14 10:30:43,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:30:43,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:30:43,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:30:43,668 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:30:43,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 10:30:43,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:30:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:30:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:30:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:30:43,948 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:30:43,948 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:30:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:30:45,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 722 treesize of output 328 [2022-12-14 10:30:45,264 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 7 treesize of output 5 [2022-12-14 10:30:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:30:45,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:30:47,109 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-12-14 10:30:47,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1205 treesize of output 610 [2022-12-14 10:30:47,122 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 610 treesize of output 602 [2022-12-14 10:31:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:31:30,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979702457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:31:30,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:31:30,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 24 [2022-12-14 10:31:30,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315093755] [2022-12-14 10:31:30,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:31:30,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:31:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:31:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:31:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:31:30,478 INFO L87 Difference]: Start difference. First operand 408 states and 1191 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-12-14 10:32:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:33,832 INFO L93 Difference]: Finished difference Result 1268 states and 3777 transitions. [2022-12-14 10:32:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 10:32:33,838 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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 11 [2022-12-14 10:32:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:33,843 INFO L225 Difference]: With dead ends: 1268 [2022-12-14 10:32:33,843 INFO L226 Difference]: Without dead ends: 1268 [2022-12-14 10:32:33,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=609, Invalid=2147, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:32:33,844 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1085 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:33,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1085 Valid, 0 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2022-12-14 10:32:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-12-14 10:32:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 694. [2022-12-14 10:32:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 689 states have (on average 3.346879535558781) internal successors, (2306), 693 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2306 transitions. [2022-12-14 10:32:33,863 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2306 transitions. Word has length 11 [2022-12-14 10:32:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:33,864 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 2306 transitions. [2022-12-14 10:32:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-12-14 10:32:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2306 transitions. [2022-12-14 10:32:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:32:33,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:33,864 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 10:32:33,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:32:34,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:34,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 10:32:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:34,467 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:32:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1896529910, now seen corresponding path program 3 times [2022-12-14 10:32:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:32:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420385924] [2022-12-14 10:32:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:34,469 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 [2022-12-14 10:32:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:32:34,470 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:32:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:32:34,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:32:34,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:32:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:34,877 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:32:34,878 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:32:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:36,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:42,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:32:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420385924] [2022-12-14 10:32:42,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420385924] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1363516915] [2022-12-14 10:32:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:32:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:32:42,056 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:32:42,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 10:32:42,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:32:42,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:32:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:42,830 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:32:42,830 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:32:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:51,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1363516915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:51,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970873469] [2022-12-14 10:32:51,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:51,737 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:51,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 10:32:53,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:32:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:32:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:54,023 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:32:54,023 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:32:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:54,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:56,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970873469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:56,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:32:56,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 35 [2022-12-14 10:32:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859619884] [2022-12-14 10:32:56,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:56,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 10:32:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:32:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 10:32:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 10:32:56,123 INFO L87 Difference]: Start difference. First operand 694 states and 2306 transitions. Second operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:33:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:33:42,222 INFO L93 Difference]: Finished difference Result 3881 states and 12056 transitions. [2022-12-14 10:33:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:33:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 10:33:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:33:42,242 INFO L225 Difference]: With dead ends: 3881 [2022-12-14 10:33:42,242 INFO L226 Difference]: Without dead ends: 3881 [2022-12-14 10:33:42,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=704, Invalid=1458, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 10:33:42,243 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2955 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2955 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:33:42,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2955 Valid, 0 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2022-12-14 10:33:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3881 states. [2022-12-14 10:33:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3881 to 706. [2022-12-14 10:33:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 701 states have (on average 3.3238231098430813) internal successors, (2330), 705 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:33:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2330 transitions. [2022-12-14 10:33:42,288 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2330 transitions. Word has length 12 [2022-12-14 10:33:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:33:42,288 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 2330 transitions. [2022-12-14 10:33:42,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:33:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2330 transitions. [2022-12-14 10:33:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:33:42,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:33:42,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 10:33:42,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 10:33:42,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 10:33:42,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 10:33:42,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:33:42,891 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 10:33:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:33:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1561511488, now seen corresponding path program 5 times [2022-12-14 10:33:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:33:42,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361329701] [2022-12-14 10:33:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:33:42,894 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 [2022-12-14 10:33:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:33:42,896 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 10:33:42,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77a1b7ea-7f00-4317-a87e-e1deade09b6b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 10:33:43,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-14 10:33:43,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:33:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:33:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:33:43,322 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 10:33:43,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 10:33:45,692 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 7 treesize of output 5 [2022-12-14 10:33:45,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:33:45,847 INFO L321 Elim1Store]: treesize reduction 332, result has 0.3 percent of original size [2022-12-14 10:33:45,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 1277 treesize of output 511 [2022-12-14 10:33:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:33:58,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:34:14,664 INFO L321 Elim1Store]: treesize reduction 440, result has 0.2 percent of original size [2022-12-14 10:34:14,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 2756 treesize of output 1133 [2022-12-14 10:34:14,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1133 treesize of output 1121 [2022-12-14 10:37:55,484 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)