./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- 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 15:55:45,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:55:45,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:55:45,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:55:45,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:55:45,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:55:45,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:55:45,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:55:45,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:55:45,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:55:45,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:55:45,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:55:45,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:55:45,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:55:45,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:55:45,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:55:45,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:55:45,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:55:45,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:55:45,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:55:45,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:55:45,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:55:45,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:55:45,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:55:45,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:55:45,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:55:45,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:55:45,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:55:45,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:55:45,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:55:45,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:55:45,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:55:45,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:55:45,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:55:45,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:55:45,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:55:46,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:55:46,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:55:46,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:55:46,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:55:46,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:55:46,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 15:55:46,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:55:46,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:55:46,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:55:46,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:55:46,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:55:46,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:55:46,021 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:55:46,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:55:46,022 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:55:46,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:55:46,022 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:55:46,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:55:46,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:55:46,022 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:55:46,023 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:55:46,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:55:46,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:55:46,023 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:55:46,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:55:46,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:55:46,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:55:46,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:55:46,024 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:55:46,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:55:46,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:55:46,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:55:46,025 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:55:46,025 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:55:46,025 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:55:46,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:55:46,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:55:46,026 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:55:46,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:55:46,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:55:46,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:55:46,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:55:46,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:55:46,027 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:55:46,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:55:46,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:55:46,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:55:46,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:55:46,028 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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-12-14 15:55:46,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:55:46,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:55:46,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:55:46,211 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:55:46,212 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:55:46,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-14 15:55:48,868 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:55:49,016 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:55:49,016 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-14 15:55:49,021 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data/8412347a4/188bb80a4e87490e99ac4cef554a2650/FLAGa7b732649 [2022-12-14 15:55:49,031 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data/8412347a4/188bb80a4e87490e99ac4cef554a2650 [2022-12-14 15:55:49,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:55:49,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:55:49,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:55:49,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:55:49,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:55:49,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:55:49" (1/1) ... [2022-12-14 15:55:49,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e2e32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:49, skipping insertion in model container [2022-12-14 15:55:49,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:55:49" (1/1) ... [2022-12-14 15:55:49,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:55:49,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:55:49,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:49,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:49,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:49,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:49,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:49,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:49,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:49,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:49,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:49,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:49,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:49,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:49,191 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-14 15:55:49,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:55:49,213 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 15:55:49,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@397b11d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:49, skipping insertion in model container [2022-12-14 15:55:49,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:55:49,214 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 15:55:49,216 INFO L158 Benchmark]: Toolchain (without parser) took 181.33ms. Allocated memory is still 136.3MB. Free memory was 95.4MB in the beginning and 84.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:55:49,217 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 136.3MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:55:49,218 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.61ms. Allocated memory is still 136.3MB. Free memory was 95.0MB in the beginning and 84.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:55:49,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 136.3MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.61ms. Allocated memory is still 136.3MB. Free memory was 95.0MB in the beginning and 84.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- 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 15:55:50,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:55:50,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:55:50,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:55:50,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:55:50,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:55:50,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:55:50,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:55:50,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:55:50,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:55:50,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:55:50,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:55:50,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:55:50,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:55:50,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:55:50,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:55:50,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:55:50,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:55:50,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:55:50,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:55:50,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:55:50,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:55:50,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:55:50,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:55:50,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:55:50,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:55:50,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:55:50,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:55:50,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:55:50,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:55:50,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:55:50,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:55:50,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:55:50,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:55:50,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:55:50,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:55:50,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:55:50,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:55:50,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:55:50,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:55:50,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:55:50,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 15:55:50,668 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:55:50,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:55:50,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:55:50,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:55:50,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:55:50,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:55:50,669 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:55:50,669 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:55:50,669 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:55:50,669 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:55:50,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:55:50,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:55:50,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 15:55:50,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 15:55:50,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:55:50,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:55:50,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:55:50,672 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 15:55:50,672 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 15:55:50,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:55:50,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:55:50,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:55:50,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 15:55:50,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:55:50,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:55:50,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:55:50,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:55:50,679 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 15:55:50,679 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 15:55:50,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:55:50,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 15:55:50,679 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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-12-14 15:55:50,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:55:50,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:55:50,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:55:50,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:55:50,952 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:55:50,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-14 15:55:53,495 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:55:53,660 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:55:53,660 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-14 15:55:53,666 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data/88335b9d2/1d9ddd72ec5147f58a839972991c9699/FLAG6bd6a1e9e [2022-12-14 15:55:53,679 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/data/88335b9d2/1d9ddd72ec5147f58a839972991c9699 [2022-12-14 15:55:53,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:55:53,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:55:53,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:55:53,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:55:53,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:55:53,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:53,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f27006a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53, skipping insertion in model container [2022-12-14 15:55:53,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:53,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:55:53,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:55:53,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,871 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,874 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,875 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,875 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,883 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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-14 15:55:53,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:55:53,907 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 15:55:53,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:55:53,913 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,915 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,916 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,916 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,916 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,917 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,917 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,920 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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-14 15:55:53,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:55:53,928 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:55:53,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 15:55:53,944 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 15:55:53,947 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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-14 15:55:53,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:55:53,969 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:55:53,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53 WrapperNode [2022-12-14 15:55:53,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:55:53,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:55:53,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:55:53,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:55:53,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:53,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,007 INFO L138 Inliner]: procedures = 27, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2022-12-14 15:55:54,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:55:54,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:55:54,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:55:54,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:55:54,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:55:54,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:55:54,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:55:54,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:55:54,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (1/1) ... [2022-12-14 15:55:54,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:55:54,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:55:54,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:55:54,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:55:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:55:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 15:55:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:55:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 15:55:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 15:55:54,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 15:55:54,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 15:55:54,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:55:54,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:55:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:55:54,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 15:55:54,104 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 15:55:54,193 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:55:54,195 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:55:54,642 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:55:54,794 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:55:54,794 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 15:55:54,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:55:54 BoogieIcfgContainer [2022-12-14 15:55:54,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:55:54,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:55:54,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:55:54,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:55:54,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:55:53" (1/3) ... [2022-12-14 15:55:54,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8397a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:55:54, skipping insertion in model container [2022-12-14 15:55:54,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:55:53" (2/3) ... [2022-12-14 15:55:54,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8397a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:55:54, skipping insertion in model container [2022-12-14 15:55:54,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:55:54" (3/3) ... [2022-12-14 15:55:54,805 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-12-14 15:55:54,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:55:54,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-14 15:55:54,823 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 15:55:54,891 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 15:55:54,923 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 15:55:54,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 177 transitions, 378 flow [2022-12-14 15:55:54,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 177 transitions, 378 flow [2022-12-14 15:55:54,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 177 transitions, 378 flow [2022-12-14 15:55:54,997 INFO L130 PetriNetUnfolder]: 12/174 cut-off events. [2022-12-14 15:55:54,997 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 15:55:55,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 12/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2022-12-14 15:55:55,004 INFO L119 LiptonReduction]: Number of co-enabled transitions 2418 [2022-12-14 15:56:14,205 INFO L134 LiptonReduction]: Checked pairs total: 3754 [2022-12-14 15:56:14,205 INFO L136 LiptonReduction]: Total number of compositions: 175 [2022-12-14 15:56:14,211 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 51 transitions, 126 flow [2022-12-14 15:56:14,261 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 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 15:56:14,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:56:14,280 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;@4a3223ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:56:14,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-12-14 15:56:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 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 15:56:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:56:14,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:14,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:56:14,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 27033, now seen corresponding path program 1 times [2022-12-14 15:56:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:14,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892893348] [2022-12-14 15:56:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:14,301 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 15:56:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:14,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:14,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:56:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:14,495 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 15:56:14,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 15:56:14,524 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 15:56:14,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:14,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892893348] [2022-12-14 15:56:14,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892893348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:14,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:14,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:14,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531148211] [2022-12-14 15:56:14,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:14,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:14,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:14,562 INFO L87 Difference]: Start difference. First operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 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 15:56:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:14,741 INFO L93 Difference]: Finished difference Result 1036 states and 3589 transitions. [2022-12-14 15:56:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:14,743 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 15:56:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:14,759 INFO L225 Difference]: With dead ends: 1036 [2022-12-14 15:56:14,759 INFO L226 Difference]: Without dead ends: 1036 [2022-12-14 15:56:14,759 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 15:56:14,762 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:14,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-12-14 15:56:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2022-12-14 15:56:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 904 states have (on average 3.9701327433628317) internal successors, (3589), 1035 states have internal predecessors, (3589), 0 states have call successors, (0), 0 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 15:56:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3589 transitions. [2022-12-14 15:56:14,847 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3589 transitions. Word has length 2 [2022-12-14 15:56:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:14,848 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 3589 transitions. [2022-12-14 15:56:14,848 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 15:56:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3589 transitions. [2022-12-14 15:56:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:56:14,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:14,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:56:14,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 27193, now seen corresponding path program 1 times [2022-12-14 15:56:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:15,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743291669] [2022-12-14 15:56:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:15,053 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 15:56:15,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:15,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:56:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:15,263 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 15:56:15,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-14 15:56:15,299 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 15:56:15,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:15,299 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743291669] [2022-12-14 15:56:15,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743291669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:15,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:15,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456219784] [2022-12-14 15:56:15,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:15,301 INFO L87 Difference]: Start difference. First operand 1036 states and 3589 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 15:56:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:15,492 INFO L93 Difference]: Finished difference Result 855 states and 2868 transitions. [2022-12-14 15:56:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:15,493 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 15:56:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:15,498 INFO L225 Difference]: With dead ends: 855 [2022-12-14 15:56:15,498 INFO L226 Difference]: Without dead ends: 855 [2022-12-14 15:56:15,498 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 15:56:15,504 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:15,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:56:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-12-14 15:56:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2022-12-14 15:56:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 751 states have (on average 3.818908122503329) internal successors, (2868), 854 states have internal predecessors, (2868), 0 states have call successors, (0), 0 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 15:56:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2868 transitions. [2022-12-14 15:56:15,524 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2868 transitions. Word has length 2 [2022-12-14 15:56:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:15,524 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 2868 transitions. [2022-12-14 15:56:15,525 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 15:56:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2868 transitions. [2022-12-14 15:56:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:56:15,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:15,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:56:15,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 27034, now seen corresponding path program 1 times [2022-12-14 15:56:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:15,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64857943] [2022-12-14 15:56:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:15,728 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 15:56:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:15,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:56:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:16,025 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:16,025 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:16,048 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 15:56:16,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:16,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:16,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64857943] [2022-12-14 15:56:16,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64857943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:16,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:16,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322146384] [2022-12-14 15:56:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:16,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:16,051 INFO L87 Difference]: Start difference. First operand 855 states and 2868 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 15:56:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:16,372 INFO L93 Difference]: Finished difference Result 1708 states and 5734 transitions. [2022-12-14 15:56:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:16,372 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 15:56:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:16,380 INFO L225 Difference]: With dead ends: 1708 [2022-12-14 15:56:16,380 INFO L226 Difference]: Without dead ends: 1708 [2022-12-14 15:56:16,380 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 15:56:16,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:16,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:56:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-12-14 15:56:16,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 856. [2022-12-14 15:56:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 752 states have (on average 3.81781914893617) internal successors, (2871), 855 states have internal predecessors, (2871), 0 states have call successors, (0), 0 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 15:56:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2871 transitions. [2022-12-14 15:56:16,412 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2871 transitions. Word has length 2 [2022-12-14 15:56:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:16,413 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 2871 transitions. [2022-12-14 15:56:16,413 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 15:56:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2871 transitions. [2022-12-14 15:56:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 15:56:16,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:16,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 15:56:16,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:16,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:16,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:16,614 INFO L85 PathProgramCache]: Analyzing trace with hash 27194, now seen corresponding path program 1 times [2022-12-14 15:56:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:16,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330242201] [2022-12-14 15:56:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:16,615 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 15:56:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:16,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:16,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:56:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:16,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:16,755 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 15:56:16,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 15:56:16,778 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 15:56:16,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 15:56:16,813 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 15:56:16,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:16,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:16,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330242201] [2022-12-14 15:56:16,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330242201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:16,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:16,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202761128] [2022-12-14 15:56:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:16,815 INFO L87 Difference]: Start difference. First operand 856 states and 2871 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 15:56:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:16,976 INFO L93 Difference]: Finished difference Result 675 states and 2149 transitions. [2022-12-14 15:56:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:16,976 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 15:56:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:16,980 INFO L225 Difference]: With dead ends: 675 [2022-12-14 15:56:16,980 INFO L226 Difference]: Without dead ends: 675 [2022-12-14 15:56:16,981 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 15:56:16,982 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:16,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-12-14 15:56:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2022-12-14 15:56:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 599 states have (on average 3.5876460767946576) internal successors, (2149), 674 states have internal predecessors, (2149), 0 states have call successors, (0), 0 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 15:56:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2149 transitions. [2022-12-14 15:56:17,005 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2149 transitions. Word has length 2 [2022-12-14 15:56:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:17,005 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 2149 transitions. [2022-12-14 15:56:17,005 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 15:56:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2149 transitions. [2022-12-14 15:56:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 15:56:17,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:17,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 15:56:17,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Ended with exit code 0 [2022-12-14 15:56:17,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:17,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash 842427, now seen corresponding path program 1 times [2022-12-14 15:56:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:17,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470015619] [2022-12-14 15:56:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:17,209 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 15:56:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:17,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:17,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:56:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:17,495 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:17,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:17,555 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 15:56:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:17,747 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 15:56:17,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:17,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470015619] [2022-12-14 15:56:17,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470015619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [578299389] [2022-12-14 15:56:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:17,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:56:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:56:17,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:56:17,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 15:56:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:56:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:17,939 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:17,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:17,964 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 15:56:17,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:18,024 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 15:56:18,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [578299389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:18,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453991730] [2022-12-14 15:56:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:18,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:18,026 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:18,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:56:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 15:56:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:18,163 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:18,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:18,205 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 15:56:18,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:18,318 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 15:56:18,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453991730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:18,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:56:18,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 15:56:18,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3495376] [2022-12-14 15:56:18,319 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:18,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:56:18,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:18,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:56:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:56:18,320 INFO L87 Difference]: Start difference. First operand 675 states and 2149 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 15:56:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:19,563 INFO L93 Difference]: Finished difference Result 2691 states and 8584 transitions. [2022-12-14 15:56:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:56:19,564 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 15:56:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:19,574 INFO L225 Difference]: With dead ends: 2691 [2022-12-14 15:56:19,574 INFO L226 Difference]: Without dead ends: 2691 [2022-12-14 15:56:19,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:56:19,575 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 379 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:19,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 15 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 15:56:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-12-14 15:56:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 678. [2022-12-14 15:56:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 602 states have (on average 3.579734219269103) internal successors, (2155), 677 states have internal predecessors, (2155), 0 states have call successors, (0), 0 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 15:56:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2155 transitions. [2022-12-14 15:56:19,603 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2155 transitions. Word has length 3 [2022-12-14 15:56:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:19,603 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 2155 transitions. [2022-12-14 15:56:19,604 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 15:56:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2155 transitions. [2022-12-14 15:56:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 15:56:19,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:19,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 15:56:19,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:19,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:20,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 15:56:20,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:56:20,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash 26154961, now seen corresponding path program 1 times [2022-12-14 15:56:20,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:20,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503629667] [2022-12-14 15:56:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:20,209 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 15:56:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:20,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:20,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:20,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:56:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:20,369 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 15:56:20,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 15:56:20,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-14 15:56:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:56:20,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:20,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:20,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503629667] [2022-12-14 15:56:20,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503629667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:20,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:20,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:20,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153510662] [2022-12-14 15:56:20,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:20,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:20,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:20,455 INFO L87 Difference]: Start difference. First operand 678 states and 2155 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 15:56:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:20,598 INFO L93 Difference]: Finished difference Result 637 states and 2037 transitions. [2022-12-14 15:56:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:20,599 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 15:56:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:20,601 INFO L225 Difference]: With dead ends: 637 [2022-12-14 15:56:20,601 INFO L226 Difference]: Without dead ends: 637 [2022-12-14 15:56:20,601 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 15:56:20,602 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:20,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-12-14 15:56:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2022-12-14 15:56:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 573 states have (on average 3.554973821989529) internal successors, (2037), 636 states have internal predecessors, (2037), 0 states have call successors, (0), 0 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 15:56:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2037 transitions. [2022-12-14 15:56:20,618 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2037 transitions. Word has length 4 [2022-12-14 15:56:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:20,618 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 2037 transitions. [2022-12-14 15:56:20,618 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 15:56:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2037 transitions. [2022-12-14 15:56:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 15:56:20,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:20,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 15:56:20,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:20,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:20,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 26154963, now seen corresponding path program 1 times [2022-12-14 15:56:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078669137] [2022-12-14 15:56:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:56:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:20,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:20,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:56:20,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:20,986 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-12-14 15:56:20,986 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-12-14 15:56:21,011 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 15:56:21,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:21,011 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078669137] [2022-12-14 15:56:21,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078669137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:21,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:21,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142134437] [2022-12-14 15:56:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:21,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:21,013 INFO L87 Difference]: Start difference. First operand 637 states and 2037 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 15:56:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:21,143 INFO L93 Difference]: Finished difference Result 596 states and 1919 transitions. [2022-12-14 15:56:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:21,143 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 15:56:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:21,148 INFO L225 Difference]: With dead ends: 596 [2022-12-14 15:56:21,148 INFO L226 Difference]: Without dead ends: 596 [2022-12-14 15:56:21,148 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 15:56:21,149 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:21,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-12-14 15:56:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-12-14 15:56:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 544 states have (on average 3.5275735294117645) internal successors, (1919), 595 states have internal predecessors, (1919), 0 states have call successors, (0), 0 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 15:56:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1919 transitions. [2022-12-14 15:56:21,160 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1919 transitions. Word has length 4 [2022-12-14 15:56:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:21,160 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 1919 transitions. [2022-12-14 15:56:21,160 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 15:56:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1919 transitions. [2022-12-14 15:56:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 15:56:21,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:21,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 15:56:21,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash 810798547, now seen corresponding path program 1 times [2022-12-14 15:56:21,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837943958] [2022-12-14 15:56:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:21,366 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 15:56:21,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:21,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:56:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:21,538 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 15:56:21,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 15:56:21,556 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 15:56:21,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:21,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:21,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837943958] [2022-12-14 15:56:21,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837943958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:21,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:21,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:56:21,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558512967] [2022-12-14 15:56:21,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:21,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:56:21,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:56:21,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:56:21,558 INFO L87 Difference]: Start difference. First operand 596 states and 1919 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:21,699 INFO L93 Difference]: Finished difference Result 368 states and 1161 transitions. [2022-12-14 15:56:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:56:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 15:56:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:21,701 INFO L225 Difference]: With dead ends: 368 [2022-12-14 15:56:21,701 INFO L226 Difference]: Without dead ends: 368 [2022-12-14 15:56:21,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:56:21,702 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:21,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-12-14 15:56:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-12-14 15:56:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 347 states have (on average 3.345821325648415) internal successors, (1161), 367 states have internal predecessors, (1161), 0 states have call successors, (0), 0 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 15:56:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1161 transitions. [2022-12-14 15:56:21,708 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1161 transitions. Word has length 5 [2022-12-14 15:56:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:21,708 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 1161 transitions. [2022-12-14 15:56:21,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1161 transitions. [2022-12-14 15:56:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 15:56:21,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:21,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 15:56:21,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash 810798548, now seen corresponding path program 1 times [2022-12-14 15:56:21,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113141254] [2022-12-14 15:56:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:21,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:56:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:21,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:56:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:22,072 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:22,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:22,134 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 15:56:22,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:22,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113141254] [2022-12-14 15:56:22,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113141254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:22,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:22,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773706274] [2022-12-14 15:56:22,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:56:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:56:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:56:22,135 INFO L87 Difference]: Start difference. First operand 368 states and 1161 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:22,428 INFO L93 Difference]: Finished difference Result 584 states and 1831 transitions. [2022-12-14 15:56:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:56:22,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 15:56:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:22,430 INFO L225 Difference]: With dead ends: 584 [2022-12-14 15:56:22,430 INFO L226 Difference]: Without dead ends: 584 [2022-12-14 15:56:22,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:56:22,431 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:22,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 7 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:56:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-12-14 15:56:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 440. [2022-12-14 15:56:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 419 states have (on average 3.513126491646778) internal successors, (1472), 439 states have internal predecessors, (1472), 0 states have call successors, (0), 0 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 15:56:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1472 transitions. [2022-12-14 15:56:22,442 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1472 transitions. Word has length 5 [2022-12-14 15:56:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:22,442 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1472 transitions. [2022-12-14 15:56:22,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1472 transitions. [2022-12-14 15:56:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:56:22,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:22,443 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 15:56:22,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:22,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:22,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash -668718630, now seen corresponding path program 2 times [2022-12-14 15:56:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:22,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793060289] [2022-12-14 15:56:22,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:56:22,645 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 15:56:22,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:22,646 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:22,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:22,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:56:22,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:56:22,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:56:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:22,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:22,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:22,951 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 15:56:22,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:23,508 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 15:56:23,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793060289] [2022-12-14 15:56:23,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793060289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795086128] [2022-12-14 15:56:23,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:56:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:56:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:56:23,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:56:23,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 15:56:23,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:56:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:56:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:56:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:23,736 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:23,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:23,800 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 15:56:23,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:24,495 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 15:56:24,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795086128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175189645] [2022-12-14 15:56:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:56:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:24,496 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:24,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:56:24,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:56:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:56:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:56:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:24,699 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:24,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:24,749 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 15:56:24,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:24,888 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 15:56:24,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175189645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:24,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:56:24,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 15:56:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894800359] [2022-12-14 15:56:24,889 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:24,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 15:56:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:24,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 15:56:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:56:24,890 INFO L87 Difference]: Start difference. First operand 440 states and 1472 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 15:56:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:29,248 INFO L93 Difference]: Finished difference Result 4343 states and 14624 transitions. [2022-12-14 15:56:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:56:29,249 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 15:56:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:29,265 INFO L225 Difference]: With dead ends: 4343 [2022-12-14 15:56:29,265 INFO L226 Difference]: Without dead ends: 4343 [2022-12-14 15:56:29,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:56:29,265 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1271 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:29,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 99 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 15:56:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2022-12-14 15:56:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 446. [2022-12-14 15:56:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 425 states have (on average 3.491764705882353) internal successors, (1484), 445 states have internal predecessors, (1484), 0 states have call successors, (0), 0 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 15:56:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1484 transitions. [2022-12-14 15:56:29,304 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1484 transitions. Word has length 6 [2022-12-14 15:56:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:29,304 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1484 transitions. [2022-12-14 15:56:29,304 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 15:56:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1484 transitions. [2022-12-14 15:56:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:56:29,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:29,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:56:29,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 15:56:29,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:29,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 15:56:29,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:29,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash -634864608, now seen corresponding path program 1 times [2022-12-14 15:56:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:29,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206910728] [2022-12-14 15:56:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:29,912 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 15:56:29,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:29,915 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:29,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:56:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:30,035 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 15:56:30,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 15:56:30,053 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 15:56:30,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:30,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206910728] [2022-12-14 15:56:30,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206910728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:30,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:30,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009827132] [2022-12-14 15:56:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:30,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:30,055 INFO L87 Difference]: Start difference. First operand 446 states and 1484 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:30,155 INFO L93 Difference]: Finished difference Result 416 states and 1394 transitions. [2022-12-14 15:56:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 15:56:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:30,156 INFO L225 Difference]: With dead ends: 416 [2022-12-14 15:56:30,156 INFO L226 Difference]: Without dead ends: 416 [2022-12-14 15:56:30,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:30,157 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:30,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-12-14 15:56:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-12-14 15:56:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 401 states have (on average 3.4763092269326683) internal successors, (1394), 415 states have internal predecessors, (1394), 0 states have call successors, (0), 0 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 15:56:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1394 transitions. [2022-12-14 15:56:30,170 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1394 transitions. Word has length 6 [2022-12-14 15:56:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:30,170 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1394 transitions. [2022-12-14 15:56:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1394 transitions. [2022-12-14 15:56:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:56:30,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:30,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:56:30,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Ended with exit code 0 [2022-12-14 15:56:30,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:30,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -634864607, now seen corresponding path program 1 times [2022-12-14 15:56:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:30,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317668543] [2022-12-14 15:56:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:30,375 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 15:56:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:30,378 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:30,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:30,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:56:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:30,670 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 15:56:30,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 15:56:30,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 15:56:30,702 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 15:56:30,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:30,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:30,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317668543] [2022-12-14 15:56:30,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317668543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:30,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:30,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 15:56:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405736339] [2022-12-14 15:56:30,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:30,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:56:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:56:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:30,703 INFO L87 Difference]: Start difference. First operand 416 states and 1394 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:30,822 INFO L93 Difference]: Finished difference Result 386 states and 1304 transitions. [2022-12-14 15:56:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:56:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 15:56:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:30,824 INFO L225 Difference]: With dead ends: 386 [2022-12-14 15:56:30,824 INFO L226 Difference]: Without dead ends: 386 [2022-12-14 15:56:30,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:56:30,824 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:30,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:56:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-12-14 15:56:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-12-14 15:56:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 377 states have (on average 3.4588859416445623) internal successors, (1304), 385 states have internal predecessors, (1304), 0 states have call successors, (0), 0 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 15:56:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1304 transitions. [2022-12-14 15:56:30,832 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1304 transitions. Word has length 6 [2022-12-14 15:56:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:30,832 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 1304 transitions. [2022-12-14 15:56:30,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1304 transitions. [2022-12-14 15:56:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:56:30,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:30,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:56:30,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:31,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:31,034 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash -635044018, now seen corresponding path program 1 times [2022-12-14 15:56:31,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:31,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089994621] [2022-12-14 15:56:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:31,037 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 15:56:31,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:31,038 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:31,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:56:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:31,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:31,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:31,329 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 15:56:31,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:31,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089994621] [2022-12-14 15:56:31,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089994621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:31,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:31,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:56:31,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207763691] [2022-12-14 15:56:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:31,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:56:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:56:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:56:31,330 INFO L87 Difference]: Start difference. First operand 386 states and 1304 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:31,654 INFO L93 Difference]: Finished difference Result 555 states and 1725 transitions. [2022-12-14 15:56:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:56:31,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 15:56:31,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:31,656 INFO L225 Difference]: With dead ends: 555 [2022-12-14 15:56:31,656 INFO L226 Difference]: Without dead ends: 555 [2022-12-14 15:56:31,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:56:31,657 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:31,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:56:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-12-14 15:56:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 533. [2022-12-14 15:56:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 524 states have (on average 3.2576335877862594) internal successors, (1707), 532 states have internal predecessors, (1707), 0 states have call successors, (0), 0 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 15:56:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1707 transitions. [2022-12-14 15:56:31,669 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1707 transitions. Word has length 6 [2022-12-14 15:56:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 1707 transitions. [2022-12-14 15:56:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1707 transitions. [2022-12-14 15:56:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:56:31,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:31,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:31,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:31,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:31,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash 778237935, now seen corresponding path program 1 times [2022-12-14 15:56:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371631229] [2022-12-14 15:56:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:31,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:56:31,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:31,874 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (19)] Waiting until timeout for monitored process [2022-12-14 15:56:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:56:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:32,113 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:32,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:32,211 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 15:56:32,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:32,550 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 15:56:32,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:32,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371631229] [2022-12-14 15:56:32,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371631229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:32,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [111291829] [2022-12-14 15:56:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:32,551 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:56:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:56:32,552 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:56:32,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 15:56:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:56:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:32,816 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 15:56:32,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:33,019 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 15:56:33,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [111291829] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416666967] [2022-12-14 15:56:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:33,020 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:33,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 15:56:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:56:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:33,199 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 15:56:33,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:33,220 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 15:56:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416666967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:33,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:56:33,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 15:56:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739313576] [2022-12-14 15:56:33,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 15:56:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 15:56:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-14 15:56:33,222 INFO L87 Difference]: Start difference. First operand 533 states and 1707 transitions. Second operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 15:56:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:36,689 INFO L93 Difference]: Finished difference Result 1300 states and 4079 transitions. [2022-12-14 15:56:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 15:56:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 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 15:56:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:36,695 INFO L225 Difference]: With dead ends: 1300 [2022-12-14 15:56:36,695 INFO L226 Difference]: Without dead ends: 1300 [2022-12-14 15:56:36,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 15:56:36,696 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1022 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:36,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 106 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 15:56:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-12-14 15:56:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 938. [2022-12-14 15:56:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 929 states have (on average 3.482238966630786) internal successors, (3235), 937 states have internal predecessors, (3235), 0 states have call successors, (0), 0 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 15:56:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3235 transitions. [2022-12-14 15:56:36,718 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3235 transitions. Word has length 7 [2022-12-14 15:56:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:36,718 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 3235 transitions. [2022-12-14 15:56:36,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 15:56:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3235 transitions. [2022-12-14 15:56:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:56:36,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:36,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:36,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 15:56:36,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (19)] Ended with exit code 0 [2022-12-14 15:56:37,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:37,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:37,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1794028987, now seen corresponding path program 1 times [2022-12-14 15:56:37,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:37,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045173998] [2022-12-14 15:56:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:37,324 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 15:56:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:37,325 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:37,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Waiting until timeout for monitored process [2022-12-14 15:56:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:56:37,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:37,503 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:37,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:37,642 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 15:56:37,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:37,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:37,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045173998] [2022-12-14 15:56:37,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045173998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:37,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:37,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236206584] [2022-12-14 15:56:37,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:37,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:56:37,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:56:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:56:37,644 INFO L87 Difference]: Start difference. First operand 938 states and 3235 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:38,007 INFO L93 Difference]: Finished difference Result 1424 states and 4937 transitions. [2022-12-14 15:56:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:56:38,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 15:56:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:38,011 INFO L225 Difference]: With dead ends: 1424 [2022-12-14 15:56:38,011 INFO L226 Difference]: Without dead ends: 1424 [2022-12-14 15:56:38,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:56:38,012 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:38,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 4 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:56:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-12-14 15:56:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1086. [2022-12-14 15:56:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1077 states have (on average 3.6239554317548746) internal successors, (3903), 1085 states have internal predecessors, (3903), 0 states have call successors, (0), 0 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 15:56:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3903 transitions. [2022-12-14 15:56:38,034 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3903 transitions. Word has length 7 [2022-12-14 15:56:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:38,034 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 3903 transitions. [2022-12-14 15:56:38,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3903 transitions. [2022-12-14 15:56:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:56:38,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:38,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:38,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:56:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:38,236 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1785129336, now seen corresponding path program 1 times [2022-12-14 15:56:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:38,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910923151] [2022-12-14 15:56:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:38,239 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 15:56:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:38,242 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:38,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (23)] Waiting until timeout for monitored process [2022-12-14 15:56:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:56:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:38,588 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 15:56:38,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:56:38,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:38,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910923151] [2022-12-14 15:56:38,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910923151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:56:38,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:56:38,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:56:38,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341409199] [2022-12-14 15:56:38,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:56:38,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:56:38,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:56:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:56:38,589 INFO L87 Difference]: Start difference. First operand 1086 states and 3903 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:38,891 INFO L93 Difference]: Finished difference Result 1130 states and 3970 transitions. [2022-12-14 15:56:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:56:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 15:56:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:38,896 INFO L225 Difference]: With dead ends: 1130 [2022-12-14 15:56:38,897 INFO L226 Difference]: Without dead ends: 1130 [2022-12-14 15:56:38,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:56:38,897 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:38,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:56:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-12-14 15:56:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1112. [2022-12-14 15:56:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1103 states have (on average 3.5775158658204895) internal successors, (3946), 1111 states have internal predecessors, (3946), 0 states have call successors, (0), 0 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 15:56:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3946 transitions. [2022-12-14 15:56:38,913 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3946 transitions. Word has length 9 [2022-12-14 15:56:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:38,913 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 3946 transitions. [2022-12-14 15:56:38,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3946 transitions. [2022-12-14 15:56:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:56:38,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:38,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:38,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (23)] Ended with exit code 0 [2022-12-14 15:56:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:39,115 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1303388471, now seen corresponding path program 1 times [2022-12-14 15:56:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:39,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685605057] [2022-12-14 15:56:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:56:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:39,122 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:39,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:39,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:56:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:39,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:39,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:39,523 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 15:56:39,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:40,154 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 15:56:40,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:40,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685605057] [2022-12-14 15:56:40,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685605057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:40,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34324121] [2022-12-14 15:56:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:40,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:56:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:56:40,156 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:56:40,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 15:56:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:56:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:40,409 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:40,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:40,641 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 15:56:40,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:40,907 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 15:56:40,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34324121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403388202] [2022-12-14 15:56:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:40,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:40,909 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:40,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 15:56:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:41,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 15:56:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:41,106 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:41,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:41,224 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 15:56:41,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:41,466 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 15:56:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403388202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:41,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:56:41,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 15:56:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650582922] [2022-12-14 15:56:41,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:41,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:56:41,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:56:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:56:41,467 INFO L87 Difference]: Start difference. First operand 1112 states and 3946 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:56:46,488 INFO L93 Difference]: Finished difference Result 2451 states and 8793 transitions. [2022-12-14 15:56:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 15:56:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:56:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:56:46,495 INFO L225 Difference]: With dead ends: 2451 [2022-12-14 15:56:46,495 INFO L226 Difference]: Without dead ends: 2451 [2022-12-14 15:56:46,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:56:46,496 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 305 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:56:46,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 45 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 15:56:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-12-14 15:56:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1675. [2022-12-14 15:56:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1666 states have (on average 3.6944777911164466) internal successors, (6155), 1674 states have internal predecessors, (6155), 0 states have call successors, (0), 0 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 15:56:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 6155 transitions. [2022-12-14 15:56:46,532 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 6155 transitions. Word has length 10 [2022-12-14 15:56:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:56:46,533 INFO L495 AbstractCegarLoop]: Abstraction has 1675 states and 6155 transitions. [2022-12-14 15:56:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:56:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 6155 transitions. [2022-12-14 15:56:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:56:46,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:56:46,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:56:46,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Ended with exit code 0 [2022-12-14 15:56:46,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 15:56:46,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 15:56:47,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:47,136 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:56:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:56:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1298252147, now seen corresponding path program 1 times [2022-12-14 15:56:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:56:47,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943552210] [2022-12-14 15:56:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:47,138 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 15:56:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:56:47,139 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:47,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:56:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:56:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:47,345 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:56:47,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:56:47,538 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 15:56:47,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:56:48,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:56:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943552210] [2022-12-14 15:56:48,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943552210] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091311407] [2022-12-14 15:56:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:48,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:56:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:56:48,046 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:56:48,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 15:56:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:56:48,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:48,456 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 15:56:48,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:48,843 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 15:56:48,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091311407] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:48,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401768782] [2022-12-14 15:56:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:56:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:56:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:56:48,844 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:56:48,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 15:56:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:56:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:56:48,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:49,154 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 15:56:49,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:49,201 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 15:56:49,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401768782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:49,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:56:49,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 24 [2022-12-14 15:56:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931678972] [2022-12-14 15:56:49,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:49,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 15:56:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:56:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 15:56:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-12-14 15:56:49,205 INFO L87 Difference]: Start difference. First operand 1675 states and 6155 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:00,504 INFO L93 Difference]: Finished difference Result 3643 states and 12874 transitions. [2022-12-14 15:57:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:57:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:57:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:00,515 INFO L225 Difference]: With dead ends: 3643 [2022-12-14 15:57:00,515 INFO L226 Difference]: Without dead ends: 3643 [2022-12-14 15:57:00,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=483, Invalid=1679, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:57:00,516 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 866 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:00,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 84 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 15:57:00,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2022-12-14 15:57:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 2649. [2022-12-14 15:57:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2640 states have (on average 3.918939393939394) internal successors, (10346), 2648 states have internal predecessors, (10346), 0 states have call successors, (0), 0 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 15:57:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 10346 transitions. [2022-12-14 15:57:00,568 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 10346 transitions. Word has length 10 [2022-12-14 15:57:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:00,568 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 10346 transitions. [2022-12-14 15:57:00,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:57:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 10346 transitions. [2022-12-14 15:57:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:57:00,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:00,569 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 15:57:00,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-12-14 15:57:00,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 15:57:00,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:57:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:57:01,171 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:57:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1791470540, now seen corresponding path program 2 times [2022-12-14 15:57:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:57:01,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642012973] [2022-12-14 15:57:01,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:57:01,174 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 15:57:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:57:01,176 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:57:01,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:57:01,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:57:01,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:57:01,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:57:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:01,469 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:57:01,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:57:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:01,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:57:03,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:57:03,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642012973] [2022-12-14 15:57:03,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642012973] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:03,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422846167] [2022-12-14 15:57:03,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:57:03,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:57:03,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:57:03,084 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:57:03,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 15:57:03,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:57:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:57:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:57:03,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:03,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422846167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:04,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419834863] [2022-12-14 15:57:04,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:57:04,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:04,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:04,698 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:04,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 15:57:04,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:57:04,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:57:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:57:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:04,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:57:05,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419834863] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:05,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:57:05,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 34 [2022-12-14 15:57:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036035228] [2022-12-14 15:57:05,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:57:05,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:57:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:57:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:57:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 15:57:05,188 INFO L87 Difference]: Start difference. First operand 2649 states and 10346 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:57:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:32,691 INFO L93 Difference]: Finished difference Result 6474 states and 23957 transitions. [2022-12-14 15:57:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 15:57:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 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 15:57:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:32,714 INFO L225 Difference]: With dead ends: 6474 [2022-12-14 15:57:32,714 INFO L226 Difference]: Without dead ends: 6474 [2022-12-14 15:57:32,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=704, Invalid=3586, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 15:57:32,715 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1493 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 3919 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 3942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:32,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 548 Invalid, 3942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3919 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-12-14 15:57:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2022-12-14 15:57:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 3664. [2022-12-14 15:57:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3655 states have (on average 3.987688098495212) internal successors, (14575), 3663 states have internal predecessors, (14575), 0 states have call successors, (0), 0 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 15:57:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 14575 transitions. [2022-12-14 15:57:32,835 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 14575 transitions. Word has length 11 [2022-12-14 15:57:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:32,835 INFO L495 AbstractCegarLoop]: Abstraction has 3664 states and 14575 transitions. [2022-12-14 15:57:32,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:57:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 14575 transitions. [2022-12-14 15:57:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 15:57:32,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:32,836 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 15:57:32,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 15:57:33,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Ended with exit code 0 [2022-12-14 15:57:33,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 15:57:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:33,439 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:57:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash 933613114, now seen corresponding path program 3 times [2022-12-14 15:57:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:57:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954683064] [2022-12-14 15:57:33,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:57:33,442 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 15:57:33,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:57:33,443 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:57:33,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:57:33,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:57:33,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:57:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:57:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:33,735 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:57:33,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:57:34,132 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 15:57:34,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:36,559 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 15:57:36,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:57:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954683064] [2022-12-14 15:57:36,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954683064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111268592] [2022-12-14 15:57:36,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:57:36,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:57:36,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:57:36,561 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:57:36,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 15:57:37,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:57:37,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:57:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:57:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:37,285 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:57:37,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:57:37,439 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 15:57:37,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:37,770 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 15:57:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111268592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:37,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491993296] [2022-12-14 15:57:37,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:57:37,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:57:37,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:57:37,773 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:57:37,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 15:57:40,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:57:40,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:57:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:57:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:57:40,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:57:40,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:57:40,582 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 15:57:40,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:57:44,087 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 15:57:44,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491993296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:57:44,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:57:44,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 15:57:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107165690] [2022-12-14 15:57:44,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:57:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 15:57:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:57:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 15:57:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 15:57:44,090 INFO L87 Difference]: Start difference. First operand 3664 states and 14575 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:58:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:05,955 INFO L93 Difference]: Finished difference Result 29517 states and 116331 transitions. [2022-12-14 15:58:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:58:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 15:58:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:06,073 INFO L225 Difference]: With dead ends: 29517 [2022-12-14 15:58:06,073 INFO L226 Difference]: Without dead ends: 29517 [2022-12-14 15:58:06,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=610, Invalid=1282, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 15:58:06,074 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5186 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 3335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5186 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:06,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5186 Valid, 411 Invalid, 3337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3335 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-12-14 15:58:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29517 states. [2022-12-14 15:58:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29517 to 3676. [2022-12-14 15:58:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3667 states have (on average 3.981183528770112) internal successors, (14599), 3675 states have internal predecessors, (14599), 0 states have call successors, (0), 0 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 15:58:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 14599 transitions. [2022-12-14 15:58:06,381 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 14599 transitions. Word has length 12 [2022-12-14 15:58:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:06,382 INFO L495 AbstractCegarLoop]: Abstraction has 3676 states and 14599 transitions. [2022-12-14 15:58:06,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:58:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 14599 transitions. [2022-12-14 15:58:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:58:06,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:06,383 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 15:58:06,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:58:06,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 15:58:06,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:06,985 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:58:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1898553032, now seen corresponding path program 2 times [2022-12-14 15:58:06,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:58:06,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079744391] [2022-12-14 15:58:06,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:58:06,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:58:06,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:58:06,990 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:58:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:58:07,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 15:58:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:58:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 15:58:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:07,220 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:58:07,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:58:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:58:07,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:58:07,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:58:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079744391] [2022-12-14 15:58:07,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079744391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:58:07,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:58:07,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:58:07,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458974328] [2022-12-14 15:58:07,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:58:07,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:58:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:58:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:58:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:58:07,410 INFO L87 Difference]: Start difference. First operand 3676 states and 14599 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:58:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:07,767 INFO L93 Difference]: Finished difference Result 4788 states and 18866 transitions. [2022-12-14 15:58:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:58:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 15:58:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:07,780 INFO L225 Difference]: With dead ends: 4788 [2022-12-14 15:58:07,780 INFO L226 Difference]: Without dead ends: 4788 [2022-12-14 15:58:07,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:58:07,780 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:07,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:58:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2022-12-14 15:58:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3352. [2022-12-14 15:58:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3343 states have (on average 4.026323661381992) internal successors, (13460), 3351 states have internal predecessors, (13460), 0 states have call successors, (0), 0 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 15:58:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 13460 transitions. [2022-12-14 15:58:07,859 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 13460 transitions. Word has length 13 [2022-12-14 15:58:07,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:07,860 INFO L495 AbstractCegarLoop]: Abstraction has 3352 states and 13460 transitions. [2022-12-14 15:58:07,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:58:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 13460 transitions. [2022-12-14 15:58:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:58:07,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:07,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-14 15:58:07,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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)] Ended with exit code 0 [2022-12-14 15:58:08,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:58:08,062 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:58:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1350620180, now seen corresponding path program 3 times [2022-12-14 15:58:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:58:08,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527456699] [2022-12-14 15:58:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:58:08,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 15:58:08,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:58:08,066 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:58:08,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (37)] Waiting until timeout for monitored process [2022-12-14 15:58:08,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:58:08,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:58:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:58:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:08,345 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:58:08,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:58:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:58:08,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 15:58:09,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:58:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527456699] [2022-12-14 15:58:09,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527456699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:58:09,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921078404] [2022-12-14 15:58:09,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:58:09,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:58:09,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:58:09,563 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:58:09,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 15:58:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:58:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:58:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 15:58:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:10,015 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:58:10,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:58:10,613 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 13 treesize of output 9 [2022-12-14 15:58:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:10,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1921078404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:58:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037178619] [2022-12-14 15:58:13,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:58:13,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:13,019 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 15:58:13,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:58:13,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:58:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:58:13,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:13,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:15,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037178619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:58:15,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:58:15,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-12-14 15:58:15,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583189485] [2022-12-14 15:58:15,679 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:58:15,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 15:58:15,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:58:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 15:58:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 15:58:15,681 INFO L87 Difference]: Start difference. First operand 3352 states and 13460 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 15:58:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:58:51,386 INFO L93 Difference]: Finished difference Result 10805 states and 39599 transitions. [2022-12-14 15:58:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 15:58:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 15:58:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:58:51,414 INFO L225 Difference]: With dead ends: 10805 [2022-12-14 15:58:51,414 INFO L226 Difference]: Without dead ends: 10805 [2022-12-14 15:58:51,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2285, Invalid=10371, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 15:58:51,416 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 5595 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 10336 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5595 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 10448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 10336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:58:51,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5595 Valid, 1400 Invalid, 10448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 10336 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2022-12-14 15:58:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10805 states. [2022-12-14 15:58:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10805 to 5231. [2022-12-14 15:58:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5222 states have (on average 4.1997319034852545) internal successors, (21931), 5230 states have internal predecessors, (21931), 0 states have call successors, (0), 0 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 15:58:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 21931 transitions. [2022-12-14 15:58:51,549 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 21931 transitions. Word has length 13 [2022-12-14 15:58:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:58:51,549 INFO L495 AbstractCegarLoop]: Abstraction has 5231 states and 21931 transitions. [2022-12-14 15:58:51,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 15:58:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 21931 transitions. [2022-12-14 15:58:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:58:51,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:58:51,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:58:51,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 15:58:51,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (37)] Ended with exit code 0 [2022-12-14 15:58:51,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 15:58:52,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:58:52,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:58:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:58:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash 664489544, now seen corresponding path program 1 times [2022-12-14 15:58:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:58:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924579265] [2022-12-14 15:58:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:52,155 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 15:58:52,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:58:52,157 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:58:52,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (40)] Waiting until timeout for monitored process [2022-12-14 15:58:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:58:52,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:52,352 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:58:52,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:58:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:52,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:54,595 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 15:58:54,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:58:54,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924579265] [2022-12-14 15:58:54,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924579265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:58:54,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797265785] [2022-12-14 15:58:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:58:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:58:54,596 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:58:54,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 15:58:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:58:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:54,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:58:54,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:58:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:55,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:58:58,949 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 15:58:58,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1797265785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:58:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973235195] [2022-12-14 15:58:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:58:58,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:58,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:58,950 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:58,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 15:58:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 15:58:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:59,178 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:58:59,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:58:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:58:59,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:01,263 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 15:59:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973235195] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:01,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:59:01,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 25 [2022-12-14 15:59:01,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744961070] [2022-12-14 15:59:01,264 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:59:01,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 15:59:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:59:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 15:59:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-12-14 15:59:01,265 INFO L87 Difference]: Start difference. First operand 5231 states and 21931 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:59:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:33,342 INFO L93 Difference]: Finished difference Result 10220 states and 43274 transitions. [2022-12-14 15:59:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 15:59:33,345 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 15:59:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:33,371 INFO L225 Difference]: With dead ends: 10220 [2022-12-14 15:59:33,371 INFO L226 Difference]: Without dead ends: 10220 [2022-12-14 15:59:33,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=747, Invalid=2115, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 15:59:33,373 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1144 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:33,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 188 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-12-14 15:59:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10220 states. [2022-12-14 15:59:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10220 to 7626. [2022-12-14 15:59:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 7617 states have (on average 4.266771694893002) internal successors, (32500), 7625 states have internal predecessors, (32500), 0 states have call successors, (0), 0 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 15:59:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 32500 transitions. [2022-12-14 15:59:33,559 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 32500 transitions. Word has length 13 [2022-12-14 15:59:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:33,559 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 32500 transitions. [2022-12-14 15:59:33,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:59:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 32500 transitions. [2022-12-14 15:59:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 15:59:33,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:33,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:33,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:33,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (40)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:33,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 15:59:34,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:34,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:59:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -885885033, now seen corresponding path program 2 times [2022-12-14 15:59:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:59:34,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638089920] [2022-12-14 15:59:34,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:59:34,166 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 15:59:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:59:34,169 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:59:34,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (43)] Waiting until timeout for monitored process [2022-12-14 15:59:34,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:59:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:34,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:59:34,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:34,452 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:59:34,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:59:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:34,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:35,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:59:35,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638089920] [2022-12-14 15:59:35,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638089920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:35,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098156705] [2022-12-14 15:59:35,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:59:35,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:59:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:59:35,379 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:59:35,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 15:59:35,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:59:35,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 15:59:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:36,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:36,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098156705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071879687] [2022-12-14 15:59:36,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:59:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:36,790 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:36,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 15:59:36,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:59:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:59:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:37,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:37,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071879687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:37,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 15:59:37,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 29 [2022-12-14 15:59:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539978293] [2022-12-14 15:59:37,647 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 15:59:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 15:59:37,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:59:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 15:59:37,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:59:37,647 INFO L87 Difference]: Start difference. First operand 7626 states and 32500 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 15:59:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:42,438 INFO L93 Difference]: Finished difference Result 7630 states and 32239 transitions. [2022-12-14 15:59:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:59:42,440 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 15:59:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:42,459 INFO L225 Difference]: With dead ends: 7630 [2022-12-14 15:59:42,459 INFO L226 Difference]: Without dead ends: 7630 [2022-12-14 15:59:42,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:59:42,460 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 465 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:42,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 149 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 15:59:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2022-12-14 15:59:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7522. [2022-12-14 15:59:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7522 states, 7513 states have (on average 4.26287767869027) internal successors, (32027), 7521 states have internal predecessors, (32027), 0 states have call successors, (0), 0 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 15:59:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7522 states to 7522 states and 32027 transitions. [2022-12-14 15:59:42,614 INFO L78 Accepts]: Start accepts. Automaton has 7522 states and 32027 transitions. Word has length 14 [2022-12-14 15:59:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:42,614 INFO L495 AbstractCegarLoop]: Abstraction has 7522 states and 32027 transitions. [2022-12-14 15:59:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 15:59:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7522 states and 32027 transitions. [2022-12-14 15:59:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 15:59:42,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:42,617 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:42,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 15:59:42,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:43,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (43)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:43,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:59:43,219 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 15:59:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 621505463, now seen corresponding path program 3 times [2022-12-14 15:59:43,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:59:43,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136684582] [2022-12-14 15:59:43,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:59:43,223 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 15:59:43,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:59:43,224 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 15:59:43,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (46)] Waiting until timeout for monitored process [2022-12-14 15:59:43,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:59:43,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 15:59:43,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:43,527 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:59:43,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:59:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:44,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:47,131 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 15:59:47,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:59:47,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136684582] [2022-12-14 15:59:47,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136684582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:47,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740876794] [2022-12-14 15:59:47,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:59:47,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:59:47,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:59:47,133 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:59:47,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 15:59:47,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:59:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:47,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 15:59:47,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:47,601 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:59:47,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:59:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:48,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:53,942 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 15:59:53,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740876794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:53,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842722139] [2022-12-14 15:59:53,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:59:53,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:53,944 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:53,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 15:59:54,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:59:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 15:59:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:54,396 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 15:59:54,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 15:59:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:55,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:00:01,002 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 16:00:01,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842722139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:00:01,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:00:01,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 10, 10, 10] total 38 [2022-12-14 16:00:01,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336455143] [2022-12-14 16:00:01,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:00:01,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 16:00:01,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:00:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 16:00:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 16:00:01,005 INFO L87 Difference]: Start difference. First operand 7522 states and 32027 transitions. Second operand has 40 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 16:01:03,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 16:01:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:22,153 INFO L93 Difference]: Finished difference Result 15205 states and 64395 transitions. [2022-12-14 16:01:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 16:01:22,157 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 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 16 [2022-12-14 16:01:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:22,202 INFO L225 Difference]: With dead ends: 15205 [2022-12-14 16:01:22,202 INFO L226 Difference]: Without dead ends: 15205 [2022-12-14 16:01:22,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=1488, Invalid=4992, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 16:01:22,203 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2149 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 3413 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:22,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2149 Valid, 478 Invalid, 3473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3413 Invalid, 1 Unknown, 0 Unchecked, 30.9s Time] [2022-12-14 16:01:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15205 states. [2022-12-14 16:01:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15205 to 9867. [2022-12-14 16:01:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9858 states have (on average 4.409007912355447) internal successors, (43464), 9866 states have internal predecessors, (43464), 0 states have call successors, (0), 0 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 16:01:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 43464 transitions. [2022-12-14 16:01:22,436 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 43464 transitions. Word has length 16 [2022-12-14 16:01:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:22,436 INFO L495 AbstractCegarLoop]: Abstraction has 9867 states and 43464 transitions. [2022-12-14 16:01:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 16:01:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 43464 transitions. [2022-12-14 16:01:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 16:01:22,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:22,440 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:22,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (46)] Ended with exit code 0 [2022-12-14 16:01:22,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 16:01:22,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-14 16:01:23,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:23,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 16:01:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 336127496, now seen corresponding path program 4 times [2022-12-14 16:01:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:01:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705665688] [2022-12-14 16:01:23,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:01:23,046 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 16:01:23,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:01:23,047 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:01:23,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (49)] Waiting until timeout for monitored process [2022-12-14 16:01:23,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:01:23,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:01:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 16:01:23,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:23,341 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:01:23,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:01:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:29,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:01:29,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705665688] [2022-12-14 16:01:29,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705665688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:01:29,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [726722460] [2022-12-14 16:01:29,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:01:29,837 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:01:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:01:29,837 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:01:29,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 16:01:30,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:01:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:01:30,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 16:01:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:30,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:01:30,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:01:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:31,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:41,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [726722460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:01:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619447768] [2022-12-14 16:01:41,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:01:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:01:41,967 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:01:41,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 16:01:42,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:01:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:01:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 16:01:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:42,259 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:01:42,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:01:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:43,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:01:52,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619447768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:01:52,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:01:52,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 47 [2022-12-14 16:01:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662877436] [2022-12-14 16:01:52,285 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:01:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 16:01:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:01:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 16:01:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1882, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 16:01:52,287 INFO L87 Difference]: Start difference. First operand 9867 states and 43464 transitions. Second operand has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 16:03:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:48,144 INFO L93 Difference]: Finished difference Result 23591 states and 101343 transitions. [2022-12-14 16:03:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 16:03:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 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 17 [2022-12-14 16:03:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:48,218 INFO L225 Difference]: With dead ends: 23591 [2022-12-14 16:03:48,218 INFO L226 Difference]: Without dead ends: 23591 [2022-12-14 16:03:48,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 95.3s TimeCoverageRelationStatistics Valid=2770, Invalid=8572, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 16:03:48,220 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2870 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 7506 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2870 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 7599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 7506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:48,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2870 Valid, 1031 Invalid, 7599 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 7506 Invalid, 0 Unknown, 0 Unchecked, 42.5s Time] [2022-12-14 16:03:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23591 states. [2022-12-14 16:03:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23591 to 10056. [2022-12-14 16:03:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10056 states, 10047 states have (on average 4.34089778043197) internal successors, (43613), 10055 states have internal predecessors, (43613), 0 states have call successors, (0), 0 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 16:03:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10056 states to 10056 states and 43613 transitions. [2022-12-14 16:03:48,501 INFO L78 Accepts]: Start accepts. Automaton has 10056 states and 43613 transitions. Word has length 17 [2022-12-14 16:03:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:48,501 INFO L495 AbstractCegarLoop]: Abstraction has 10056 states and 43613 transitions. [2022-12-14 16:03:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 16:03:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10056 states and 43613 transitions. [2022-12-14 16:03:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 16:03:48,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:48,504 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:48,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-12-14 16:03:48,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 16:03:48,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (49)] Ended with exit code 0 [2022-12-14 16:03:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:03:49,107 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 16:03:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2008074241, now seen corresponding path program 2 times [2022-12-14 16:03:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:03:49,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941107769] [2022-12-14 16:03:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 16:03:49,110 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 16:03:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:03:49,113 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:03:49,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (52)] Waiting until timeout for monitored process [2022-12-14 16:03:49,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 16:03:49,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 16:03:49,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:49,406 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:03:49,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:03:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:49,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:51,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:03:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941107769] [2022-12-14 16:03:51,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941107769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2058994577] [2022-12-14 16:03:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 16:03:51,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:03:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:03:51,927 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:03:51,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 16:03:52,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 16:03:52,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 16:03:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:03:53,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:03:55,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2058994577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:55,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020910551] [2022-12-14 16:03:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 16:03:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:55,044 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:55,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 16:03:55,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 16:03:55,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:03:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 16:03:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:55,387 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:03:55,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:03:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:56,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:03:58,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020910551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:03:58,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:03:58,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10, 9, 9, 9] total 52 [2022-12-14 16:03:58,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227294655] [2022-12-14 16:03:58,842 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:03:58,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 16:03:58,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:03:58,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 16:03:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 16:03:58,844 INFO L87 Difference]: Start difference. First operand 10056 states and 43613 transitions. Second operand has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 16:04:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:04:36,737 INFO L93 Difference]: Finished difference Result 10760 states and 44821 transitions. [2022-12-14 16:04:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 16:04:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 0 states have call successors, (0), 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 17 [2022-12-14 16:04:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:04:36,768 INFO L225 Difference]: With dead ends: 10760 [2022-12-14 16:04:36,769 INFO L226 Difference]: Without dead ends: 10760 [2022-12-14 16:04:36,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1144, Invalid=6338, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 16:04:36,770 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1992 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 5094 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 5127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:04:36,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1992 Valid, 445 Invalid, 5127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5094 Invalid, 0 Unknown, 0 Unchecked, 22.6s Time] [2022-12-14 16:04:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10760 states. [2022-12-14 16:04:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10760 to 9946. [2022-12-14 16:04:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9946 states, 9937 states have (on average 4.3126698198651505) internal successors, (42855), 9945 states have internal predecessors, (42855), 0 states have call successors, (0), 0 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 16:04:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9946 states to 9946 states and 42855 transitions. [2022-12-14 16:04:36,953 INFO L78 Accepts]: Start accepts. Automaton has 9946 states and 42855 transitions. Word has length 17 [2022-12-14 16:04:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:04:36,953 INFO L495 AbstractCegarLoop]: Abstraction has 9946 states and 42855 transitions. [2022-12-14 16:04:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 52 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 16:04:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 9946 states and 42855 transitions. [2022-12-14 16:04:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 16:04:36,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:04:36,958 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:04:36,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (52)] Ended with exit code 0 [2022-12-14 16:04:37,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-14 16:04:37,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 16:04:37,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:04:37,560 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 16:04:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:04:37,562 INFO L85 PathProgramCache]: Analyzing trace with hash -657470456, now seen corresponding path program 5 times [2022-12-14 16:04:37,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:04:37,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581328098] [2022-12-14 16:04:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 16:04:37,563 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 16:04:37,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:04:37,566 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:04:37,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (55)] Waiting until timeout for monitored process [2022-12-14 16:04:38,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 16:04:38,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:04:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 16:04:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:04:38,168 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:04:38,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:04:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:04:39,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:04:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:04:48,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:04:48,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581328098] [2022-12-14 16:04:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581328098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:04:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215322772] [2022-12-14 16:04:48,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 16:04:48,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:04:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:04:48,304 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:04:48,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 16:04:48,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 16:04:48,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:04:48,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 16:04:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:04:48,948 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:04:48,948 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:04:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:04:50,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:05:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:05:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215322772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:05:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336546290] [2022-12-14 16:05:04,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 16:05:04,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:04,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:04,106 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 16:05:04,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-14 16:05:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:05:04,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 16:05:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:04,637 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:05:04,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:05:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:05:05,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:05:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:05:18,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336546290] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:05:18,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:05:18,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 53 [2022-12-14 16:05:18,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157004923] [2022-12-14 16:05:18,502 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:05:18,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 16:05:18,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:05:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 16:05:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2530, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 16:05:18,504 INFO L87 Difference]: Start difference. First operand 9946 states and 42855 transitions. Second operand has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:06:32,438 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 128 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:07:49,603 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 130 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:08:04,447 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 130 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:08:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:17,336 INFO L93 Difference]: Finished difference Result 22431 states and 98451 transitions. [2022-12-14 16:08:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 16:08:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 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 19 [2022-12-14 16:08:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:17,426 INFO L225 Difference]: With dead ends: 22431 [2022-12-14 16:08:17,426 INFO L226 Difference]: Without dead ends: 22431 [2022-12-14 16:08:17,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 153.4s TimeCoverageRelationStatistics Valid=2653, Invalid=10229, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 16:08:17,427 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2847 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2847 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 6546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:17,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2847 Valid, 932 Invalid, 6546 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [115 Valid, 6431 Invalid, 0 Unknown, 0 Unchecked, 53.5s Time] [2022-12-14 16:08:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22431 states. [2022-12-14 16:08:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22431 to 12319. [2022-12-14 16:08:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12319 states, 12310 states have (on average 4.483428107229894) internal successors, (55191), 12318 states have internal predecessors, (55191), 0 states have call successors, (0), 0 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 16:08:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12319 states to 12319 states and 55191 transitions. [2022-12-14 16:08:17,782 INFO L78 Accepts]: Start accepts. Automaton has 12319 states and 55191 transitions. Word has length 19 [2022-12-14 16:08:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:17,782 INFO L495 AbstractCegarLoop]: Abstraction has 12319 states and 55191 transitions. [2022-12-14 16:08:17,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 16:08:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 12319 states and 55191 transitions. [2022-12-14 16:08:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 16:08:17,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:17,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:08:17,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-12-14 16:08:17,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (55)] Forceful destruction successful, exit code 0 [2022-12-14 16:08:18,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-14 16:08:18,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:18,392 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 16:08:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 779112415, now seen corresponding path program 3 times [2022-12-14 16:08:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:08:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573131359] [2022-12-14 16:08:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:08:18,396 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 16:08:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:08:18,399 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:08:18,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (58)] Waiting until timeout for monitored process [2022-12-14 16:08:18,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 16:08:18,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:08:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 16:08:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:19,111 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:08:19,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:08:19,307 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 13 treesize of output 9 [2022-12-14 16:08:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:08:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:08:21,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:08:21,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573131359] [2022-12-14 16:08:21,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573131359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:21,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [183519486] [2022-12-14 16:08:21,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:08:21,688 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:08:21,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:08:21,689 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:08:21,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 16:08:22,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 16:08:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:08:22,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 16:08:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:22,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:08:22,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:08:23,808 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 16:08:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:08:23,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:08:26,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [183519486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:26,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863749096] [2022-12-14 16:08:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:08:26,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:26,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:26,927 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:26,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 16:08:28,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 16:08:28,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:08:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 16:08:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:08:28,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:08:30,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863749096] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:30,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:08:30,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12, 12, 12, 12] total 56 [2022-12-14 16:08:30,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412928544] [2022-12-14 16:08:30,783 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:08:30,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 16:08:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:08:30,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 16:08:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2885, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 16:08:30,785 INFO L87 Difference]: Start difference. First operand 12319 states and 55191 transitions. Second operand has 58 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 16:09:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:11,833 INFO L93 Difference]: Finished difference Result 13659 states and 58326 transitions. [2022-12-14 16:09:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 16:09:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 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 19 [2022-12-14 16:09:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:11,876 INFO L225 Difference]: With dead ends: 13659 [2022-12-14 16:09:11,876 INFO L226 Difference]: Without dead ends: 13659 [2022-12-14 16:09:11,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1962, Invalid=8750, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 16:09:11,878 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 3989 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 10681 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3989 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 10778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 10681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:11,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3989 Valid, 818 Invalid, 10778 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [97 Valid, 10681 Invalid, 0 Unknown, 0 Unchecked, 28.0s Time] [2022-12-14 16:09:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2022-12-14 16:09:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 12145. [2022-12-14 16:09:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12145 states, 12136 states have (on average 4.486074489123269) internal successors, (54443), 12144 states have internal predecessors, (54443), 0 states have call successors, (0), 0 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 16:09:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12145 states to 12145 states and 54443 transitions. [2022-12-14 16:09:12,157 INFO L78 Accepts]: Start accepts. Automaton has 12145 states and 54443 transitions. Word has length 19 [2022-12-14 16:09:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:12,157 INFO L495 AbstractCegarLoop]: Abstraction has 12145 states and 54443 transitions. [2022-12-14 16:09:12,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 16:09:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12145 states and 54443 transitions. [2022-12-14 16:09:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 16:09:12,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:12,164 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:12,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 16:09:12,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (58)] Ended with exit code 0 [2022-12-14 16:09:12,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-12-14 16:09:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 16:09:12,766 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 16:09:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2088622882, now seen corresponding path program 4 times [2022-12-14 16:09:12,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:09:12,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286653930] [2022-12-14 16:09:12,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:09:12,768 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 16:09:12,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:09:12,770 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:09:12,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (61)] Waiting until timeout for monitored process [2022-12-14 16:09:12,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:09:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:09:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 16:09:12,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:09:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:13,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:09:15,052 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 35 treesize of output 29 [2022-12-14 16:09:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:16,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:09:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286653930] [2022-12-14 16:09:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286653930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:09:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273210570] [2022-12-14 16:09:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:09:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:09:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:09:16,112 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:09:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 16:09:16,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:09:16,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:09:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 16:09:16,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:09:16,607 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:09:16,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:09:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:18,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:09:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:22,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1273210570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:09:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261984458] [2022-12-14 16:09:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:09:22,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:09:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:09:22,135 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:09:22,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 16:09:22,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:09:22,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:09:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 16:09:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:09:22,452 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:09:22,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:09:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:23,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:09:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:27,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261984458] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:09:27,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:09:27,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 12, 12, 13] total 59 [2022-12-14 16:09:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443405677] [2022-12-14 16:09:27,209 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:09:27,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 16:09:27,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:09:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 16:09:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3238, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 16:09:27,211 INFO L87 Difference]: Start difference. First operand 12145 states and 54443 transitions. Second operand has 61 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 60 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 16:10:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:28,802 INFO L93 Difference]: Finished difference Result 59970 states and 248317 transitions. [2022-12-14 16:10:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-14 16:10:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 60 states have internal predecessors, (92), 0 states have call successors, (0), 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 20 [2022-12-14 16:10:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:29,085 INFO L225 Difference]: With dead ends: 59970 [2022-12-14 16:10:29,085 INFO L226 Difference]: Without dead ends: 59970 [2022-12-14 16:10:29,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6768 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=3465, Invalid=18291, Unknown=0, NotChecked=0, Total=21756 [2022-12-14 16:10:29,087 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 9283 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 9402 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9283 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 9468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 9402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:29,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9283 Valid, 1280 Invalid, 9468 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 9402 Invalid, 0 Unknown, 0 Unchecked, 34.8s Time] [2022-12-14 16:10:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59970 states. [2022-12-14 16:10:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59970 to 18490. [2022-12-14 16:10:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18490 states, 18481 states have (on average 4.647692224446729) internal successors, (85894), 18489 states have internal predecessors, (85894), 0 states have call successors, (0), 0 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 16:10:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18490 states to 18490 states and 85894 transitions. [2022-12-14 16:10:30,019 INFO L78 Accepts]: Start accepts. Automaton has 18490 states and 85894 transitions. Word has length 20 [2022-12-14 16:10:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:30,020 INFO L495 AbstractCegarLoop]: Abstraction has 18490 states and 85894 transitions. [2022-12-14 16:10:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 60 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 16:10:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 18490 states and 85894 transitions. [2022-12-14 16:10:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 16:10:30,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:30,025 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1] [2022-12-14 16:10:30,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 16:10:30,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-12-14 16:10:30,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (61)] Ended with exit code 0 [2022-12-14 16:10:30,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:10:30,627 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-12-14 16:10:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash -341895469, now seen corresponding path program 4 times [2022-12-14 16:10:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:10:30,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834426256] [2022-12-14 16:10:30,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:10:30,630 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 16:10:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:10:30,633 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 16:10:30,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/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 (64)] Waiting until timeout for monitored process [2022-12-14 16:10:30,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:10:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:10:30,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 16:10:30,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:10:31,072 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 16:10:31,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 16:10:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:10:32,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:10:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:36,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:10:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834426256] [2022-12-14 16:10:36,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834426256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:10:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475386662] [2022-12-14 16:10:36,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:10:36,590 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:10:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:10:36,591 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:10:36,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 16:10:37,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:10:37,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:10:37,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 16:10:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:10:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:10:39,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:10:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:10:42,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475386662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:10:42,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484294360] [2022-12-14 16:10:42,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:10:42,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:10:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:10:42,596 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:10:42,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9cac5c5-01bb-41a3-a5de-f500fc9a272e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 16:10:42,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:10:42,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:10:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 16:10:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:10:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:10:45,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:10:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:10:47,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484294360] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:10:47,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:10:47,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 14, 14] total 78 [2022-12-14 16:10:47,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593917706] [2022-12-14 16:10:47,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:10:47,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 16:10:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:10:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 16:10:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=5582, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 16:10:47,659 INFO L87 Difference]: Start difference. First operand 18490 states and 85894 transitions. Second operand has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)