./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-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_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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 05:32:31,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:32:31,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:32:31,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:32:31,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:32:31,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:32:31,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:32:31,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:32:31,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:32:31,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:32:31,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:32:31,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:32:31,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:32:31,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:32:31,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:32:31,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:32:31,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:32:31,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:32:31,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:32:31,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:32:31,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:32:31,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:32:31,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:32:31,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:32:31,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:32:31,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:32:31,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:32:31,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:32:31,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:32:31,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:32:31,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:32:31,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:32:31,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:32:31,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:32:31,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:32:31,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:32:31,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:32:31,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:32:31,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:32:31,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:32:31,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:32:31,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 05:32:31,997 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:32:31,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:32:31,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:32:31,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:32:31,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:32:31,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:32:31,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:32:31,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:32:31,999 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:32:31,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:32:31,999 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:32:31,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:32:31,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:32:32,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:32:32,000 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:32:32,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:32:32,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:32:32,000 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:32:32,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:32:32,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:32:32,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:32:32,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:32:32,002 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:32:32,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:32:32,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:32:32,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:32:32,003 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:32:32,003 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:32:32,003 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:32:32,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:32:32,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:32:32,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:32:32,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:32:32,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:32:32,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:32:32,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:32:32,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:32:32,005 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:32:32,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:32:32,005 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:32:32,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:32:32,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:32:32,006 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-12-14 05:32:32,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:32:32,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:32:32,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:32:32,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:32:32,199 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:32:32,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-14 05:32:34,772 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:32:34,919 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:32:34,920 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-14 05:32:34,925 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data/01788ea18/14b059c19dbf4ff08b89a91f7a8bdb95/FLAGab4915d45 [2022-12-14 05:32:34,938 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data/01788ea18/14b059c19dbf4ff08b89a91f7a8bdb95 [2022-12-14 05:32:34,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:32:34,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:32:34,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:32:34,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:32:34,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:32:34,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:32:34" (1/1) ... [2022-12-14 05:32:34,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8afe9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:34, skipping insertion in model container [2022-12-14 05:32:34,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:32:34" (1/1) ... [2022-12-14 05:32:34,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:32:34,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:32:35,122 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,123 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,124 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,127 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,127 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,132 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,132 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,137 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,137 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,145 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:35,145 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:35,156 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-14 05:32:35,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:32:35,179 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 05:32:35,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e71621a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:35, skipping insertion in model container [2022-12-14 05:32:35,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:32:35,180 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 05:32:35,182 INFO L158 Benchmark]: Toolchain (without parser) took 239.21ms. Allocated memory is still 138.4MB. Free memory was 107.4MB in the beginning and 95.4MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 05:32:35,182 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 138.4MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:32:35,183 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.05ms. Allocated memory is still 138.4MB. Free memory was 107.4MB in the beginning and 95.4MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 05:32:35,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 138.4MB. Free memory is still 80.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.05ms. Allocated memory is still 138.4MB. Free memory was 107.4MB in the beginning and 95.4MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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 05:32:36,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:32:36,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:32:36,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:32:36,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:32:36,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:32:36,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:32:36,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:32:36,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:32:36,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:32:36,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:32:36,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:32:36,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:32:36,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:32:36,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:32:36,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:32:36,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:32:36,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:32:36,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:32:36,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:32:36,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:32:36,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:32:36,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:32:36,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:32:36,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:32:36,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:32:36,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:32:36,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:32:36,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:32:36,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:32:36,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:32:36,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:32:36,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:32:36,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:32:36,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:32:36,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:32:36,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:32:36,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:32:36,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:32:36,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:32:36,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:32:36,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 05:32:36,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:32:36,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:32:36,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:32:36,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:32:36,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:32:36,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:32:36,680 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:32:36,680 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:32:36,680 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:32:36,681 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:32:36,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:32:36,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:32:36,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:32:36,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:32:36,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:32:36,682 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:32:36,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:32:36,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:32:36,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 05:32:36,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:32:36,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:32:36,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:32:36,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:32:36,685 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 05:32:36,685 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 05:32:36,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:32:36,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 05:32:36,685 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-12-14 05:32:36,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:32:36,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:32:36,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:32:36,927 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:32:36,927 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:32:36,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-14 05:32:39,515 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:32:39,664 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:32:39,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-14 05:32:39,672 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data/1011dc888/96b7ba5b34934b8aa8e1e18f8e657a7c/FLAGa943a148d [2022-12-14 05:32:39,687 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/data/1011dc888/96b7ba5b34934b8aa8e1e18f8e657a7c [2022-12-14 05:32:39,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:32:39,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:32:39,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:32:39,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:32:39,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:32:39,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:32:39" (1/1) ... [2022-12-14 05:32:39,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697ee545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:39, skipping insertion in model container [2022-12-14 05:32:39,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:32:39" (1/1) ... [2022-12-14 05:32:39,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:32:39,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:32:39,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,863 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,875 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,875 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,878 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,880 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,886 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,898 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-14 05:32:39,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:32:39,923 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 05:32:39,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:32:39,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,944 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,945 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,945 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,946 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,946 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,948 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,949 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,951 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,953 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,954 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,954 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,955 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,960 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-14 05:32:39,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:32:39,970 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:32:39,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,986 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,993 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,996 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,996 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:39,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:32:39,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:32:40,003 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_589f9614-5c8b-4597-814b-b5064f6eb7dc/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-14 05:32:40,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:32:40,025 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:32:40,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40 WrapperNode [2022-12-14 05:32:40,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:32:40,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:32:40,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:32:40,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:32:40,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,067 INFO L138 Inliner]: procedures = 28, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 306 [2022-12-14 05:32:40,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:32:40,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:32:40,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:32:40,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:32:40,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:32:40,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:32:40,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:32:40,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:32:40,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (1/1) ... [2022-12-14 05:32:40,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:32:40,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:40,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:32:40,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:32:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:32:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 05:32:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:32:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 05:32:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 05:32:40,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 05:32:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 05:32:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 05:32:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-14 05:32:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:32:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:32:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 05:32:40,152 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 05:32:40,253 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:32:40,255 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:32:40,786 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:32:40,953 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:32:40,954 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 05:32:40,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:32:40 BoogieIcfgContainer [2022-12-14 05:32:40,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:32:40,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:32:40,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:32:40,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:32:40,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:32:39" (1/3) ... [2022-12-14 05:32:40,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421c78f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:32:40, skipping insertion in model container [2022-12-14 05:32:40,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:40" (2/3) ... [2022-12-14 05:32:40,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421c78f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:32:40, skipping insertion in model container [2022-12-14 05:32:40,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:32:40" (3/3) ... [2022-12-14 05:32:40,963 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-12-14 05:32:40,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:32:40,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-14 05:32:40,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 05:32:41,040 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 05:32:41,066 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 05:32:41,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 268 transitions, 568 flow [2022-12-14 05:32:41,081 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 268 transitions, 568 flow [2022-12-14 05:32:41,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 268 transitions, 568 flow [2022-12-14 05:32:41,172 INFO L130 PetriNetUnfolder]: 19/264 cut-off events. [2022-12-14 05:32:41,172 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-14 05:32:41,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 264 events. 19/264 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 212. Up to 2 conditions per place. [2022-12-14 05:32:41,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2022-12-14 05:33:20,485 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 136 DAG size of output: 131 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 05:33:21,949 INFO L134 LiptonReduction]: Checked pairs total: 7176 [2022-12-14 05:33:21,949 INFO L136 LiptonReduction]: Total number of compositions: 269 [2022-12-14 05:33:21,955 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 71 transitions, 174 flow [2022-12-14 05:33:22,189 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7261 states, 6855 states have (on average 4.742669584245077) internal successors, (32511), 7260 states have internal predecessors, (32511), 0 states have call successors, (0), 0 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 05:33:22,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:33:22,207 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;@664662d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:33:22,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-14 05:33:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 7261 states, 6855 states have (on average 4.742669584245077) internal successors, (32511), 7260 states have internal predecessors, (32511), 0 states have call successors, (0), 0 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 05:33:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:33:22,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:22,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:33:22,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 39904, now seen corresponding path program 1 times [2022-12-14 05:33:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:22,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971929242] [2022-12-14 05:33:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:22,241 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 05:33:22,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:22,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:22,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:33:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:22,519 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:33:22,520 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:33:22,557 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 05:33:22,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:22,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971929242] [2022-12-14 05:33:22,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971929242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:22,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:22,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:33:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150959060] [2022-12-14 05:33:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:22,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:33:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:33:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:33:22,595 INFO L87 Difference]: Start difference. First operand has 7261 states, 6855 states have (on average 4.742669584245077) internal successors, (32511), 7260 states have internal predecessors, (32511), 0 states have call successors, (0), 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 05:33:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:22,975 INFO L93 Difference]: Finished difference Result 7258 states and 32508 transitions. [2022-12-14 05:33:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:33:22,985 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 05:33:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:23,084 INFO L225 Difference]: With dead ends: 7258 [2022-12-14 05:33:23,084 INFO L226 Difference]: Without dead ends: 7258 [2022-12-14 05:33:23,085 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 05:33:23,088 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:23,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:33:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2022-12-14 05:33:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 7258. [2022-12-14 05:33:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 6855 states have (on average 4.742231947483589) internal successors, (32508), 7257 states have internal predecessors, (32508), 0 states have call successors, (0), 0 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 05:33:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 32508 transitions. [2022-12-14 05:33:23,527 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 32508 transitions. Word has length 2 [2022-12-14 05:33:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:23,527 INFO L495 AbstractCegarLoop]: Abstraction has 7258 states and 32508 transitions. [2022-12-14 05:33:23,527 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 05:33:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 32508 transitions. [2022-12-14 05:33:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:33:23,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:23,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:33:23,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:23,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:23,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 39905, now seen corresponding path program 1 times [2022-12-14 05:33:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:23,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722475820] [2022-12-14 05:33:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:23,734 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 05:33:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:23,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:33:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:24,027 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:24,027 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:24,063 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 05:33:24,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:24,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:24,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722475820] [2022-12-14 05:33:24,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722475820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:24,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:24,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:33:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720947798] [2022-12-14 05:33:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:24,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:33:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:33:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:33:24,066 INFO L87 Difference]: Start difference. First operand 7258 states and 32508 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 05:33:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:24,630 INFO L93 Difference]: Finished difference Result 14513 states and 65013 transitions. [2022-12-14 05:33:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:33:24,631 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 05:33:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:24,744 INFO L225 Difference]: With dead ends: 14513 [2022-12-14 05:33:24,744 INFO L226 Difference]: Without dead ends: 14513 [2022-12-14 05:33:24,744 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 05:33:24,746 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:24,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 12 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:33:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14513 states. [2022-12-14 05:33:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14513 to 7260. [2022-12-14 05:33:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7260 states, 6857 states have (on average 4.741723785912207) internal successors, (32514), 7259 states have internal predecessors, (32514), 0 states have call successors, (0), 0 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 05:33:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7260 states to 7260 states and 32514 transitions. [2022-12-14 05:33:25,073 INFO L78 Accepts]: Start accepts. Automaton has 7260 states and 32514 transitions. Word has length 2 [2022-12-14 05:33:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:25,075 INFO L495 AbstractCegarLoop]: Abstraction has 7260 states and 32514 transitions. [2022-12-14 05:33:25,076 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 05:33:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 7260 states and 32514 transitions. [2022-12-14 05:33:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:33:25,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:25,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:33:25,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:33:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:25,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1242426, now seen corresponding path program 1 times [2022-12-14 05:33:25,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:25,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727622312] [2022-12-14 05:33:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:25,281 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 05:33:25,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:25,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:25,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:25,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:33:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:25,490 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:25,491 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:25,561 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 05:33:25,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:25,769 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 05:33:25,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:25,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727622312] [2022-12-14 05:33:25,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727622312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1112790848] [2022-12-14 05:33:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:33:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:33:25,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:33:25,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 05:33:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:33:25,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:26,057 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:26,058 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:26,109 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 05:33:26,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:26,168 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 05:33:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1112790848] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457189671] [2022-12-14 05:33:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:26,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:26,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:26,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:26,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:33:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:33:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:26,387 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:26,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:26,435 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 05:33:26,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:26,559 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 05:33:26,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457189671] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:26,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:33:26,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 05:33:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526589051] [2022-12-14 05:33:26,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:26,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:33:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:33:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:33:26,562 INFO L87 Difference]: Start difference. First operand 7260 states and 32514 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 05:33:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:29,119 INFO L93 Difference]: Finished difference Result 29025 states and 130029 transitions. [2022-12-14 05:33:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:33:29,120 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 05:33:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:29,276 INFO L225 Difference]: With dead ends: 29025 [2022-12-14 05:33:29,276 INFO L226 Difference]: Without dead ends: 29025 [2022-12-14 05:33:29,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:33:29,277 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 567 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:29,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 30 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 05:33:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29025 states. [2022-12-14 05:33:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29025 to 7266. [2022-12-14 05:33:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7266 states, 6863 states have (on average 4.740201078245665) internal successors, (32532), 7265 states have internal predecessors, (32532), 0 states have call successors, (0), 0 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 05:33:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 32532 transitions. [2022-12-14 05:33:29,731 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 32532 transitions. Word has length 3 [2022-12-14 05:33:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:29,731 INFO L495 AbstractCegarLoop]: Abstraction has 7266 states and 32532 transitions. [2022-12-14 05:33:29,732 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 05:33:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 32532 transitions. [2022-12-14 05:33:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:33:29,732 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:29,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:33:29,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:33:29,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 05:33:30,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 05:33:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:33:30,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1243949, now seen corresponding path program 1 times [2022-12-14 05:33:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:30,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228048380] [2022-12-14 05:33:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:30,340 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 05:33:30,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:30,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:30,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (7)] Waiting until timeout for monitored process [2022-12-14 05:33:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:30,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:33:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:30,559 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-14 05:33:30,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-12-14 05:33:31,415 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-12-14 05:33:31,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-12-14 05:33:31,650 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 05:33:31,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:31,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:31,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228048380] [2022-12-14 05:33:31,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228048380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:31,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:31,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:33:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37251589] [2022-12-14 05:33:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:31,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:33:31,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:33:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:33:31,653 INFO L87 Difference]: Start difference. First operand 7266 states and 32532 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:32,143 INFO L93 Difference]: Finished difference Result 5969 states and 26047 transitions. [2022-12-14 05:33:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:33:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 05:33:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:32,164 INFO L225 Difference]: With dead ends: 5969 [2022-12-14 05:33:32,164 INFO L226 Difference]: Without dead ends: 5969 [2022-12-14 05:33:32,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:33:32,165 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:32,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:33:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2022-12-14 05:33:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 5969. [2022-12-14 05:33:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5969 states, 5648 states have (on average 4.611720963172805) internal successors, (26047), 5968 states have internal predecessors, (26047), 0 states have call successors, (0), 0 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 05:33:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5969 states to 5969 states and 26047 transitions. [2022-12-14 05:33:32,292 INFO L78 Accepts]: Start accepts. Automaton has 5969 states and 26047 transitions. Word has length 3 [2022-12-14 05:33:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:32,292 INFO L495 AbstractCegarLoop]: Abstraction has 5969 states and 26047 transitions. [2022-12-14 05:33:32,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5969 states and 26047 transitions. [2022-12-14 05:33:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:33:32,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:32,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:33:32,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (7)] Ended with exit code 0 [2022-12-14 05:33:32,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:32,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1243950, now seen corresponding path program 1 times [2022-12-14 05:33:32,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:32,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638869058] [2022-12-14 05:33:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:32,496 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 05:33:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:32,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:32,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Waiting until timeout for monitored process [2022-12-14 05:33:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:33:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,801 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 05:33:32,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-14 05:33:32,835 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 05:33:32,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 05:33:32,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:32,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:33:32,915 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 05:33:32,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:32,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:32,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638869058] [2022-12-14 05:33:32,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638869058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:32,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:32,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:33:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007840152] [2022-12-14 05:33:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:33:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:33:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:32,918 INFO L87 Difference]: Start difference. First operand 5969 states and 26047 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:33,128 INFO L93 Difference]: Finished difference Result 4672 states and 19562 transitions. [2022-12-14 05:33:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:33:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 05:33:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:33,144 INFO L225 Difference]: With dead ends: 4672 [2022-12-14 05:33:33,144 INFO L226 Difference]: Without dead ends: 4672 [2022-12-14 05:33:33,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:33,145 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:33,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:33:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2022-12-14 05:33:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4672. [2022-12-14 05:33:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4433 states have (on average 4.412812993458155) internal successors, (19562), 4671 states have internal predecessors, (19562), 0 states have call successors, (0), 0 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 05:33:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19562 transitions. [2022-12-14 05:33:33,284 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19562 transitions. Word has length 3 [2022-12-14 05:33:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:33,285 INFO L495 AbstractCegarLoop]: Abstraction has 4672 states and 19562 transitions. [2022-12-14 05:33:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19562 transitions. [2022-12-14 05:33:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:33:33,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:33,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:33:33,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:33:33,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:33,487 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1195464582, now seen corresponding path program 1 times [2022-12-14 05:33:33,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:33,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461995267] [2022-12-14 05:33:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:33,488 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 05:33:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:33,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:33,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:33:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:33,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:33,722 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-14 05:33:33,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-12-14 05:33:33,979 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-14 05:33:33,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 05:33:34,059 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 05:33:34,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:34,060 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:34,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461995267] [2022-12-14 05:33:34,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461995267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:34,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:34,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:33:34,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416505576] [2022-12-14 05:33:34,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:34,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:33:34,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:33:34,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:33:34,061 INFO L87 Difference]: Start difference. First operand 4672 states and 19562 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:34,314 INFO L93 Difference]: Finished difference Result 4450 states and 18686 transitions. [2022-12-14 05:33:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:33:34,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 05:33:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:34,332 INFO L225 Difference]: With dead ends: 4450 [2022-12-14 05:33:34,332 INFO L226 Difference]: Without dead ends: 4450 [2022-12-14 05:33:34,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:33:34,333 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:34,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:33:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2022-12-14 05:33:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 4450. [2022-12-14 05:33:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4241 states have (on average 4.406036312190521) internal successors, (18686), 4449 states have internal predecessors, (18686), 0 states have call successors, (0), 0 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 05:33:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 18686 transitions. [2022-12-14 05:33:34,451 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 18686 transitions. Word has length 5 [2022-12-14 05:33:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:34,451 INFO L495 AbstractCegarLoop]: Abstraction has 4450 states and 18686 transitions. [2022-12-14 05:33:34,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 18686 transitions. [2022-12-14 05:33:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:33:34,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:34,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:33:34,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:34,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:34,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1195464583, now seen corresponding path program 1 times [2022-12-14 05:33:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:34,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236019913] [2022-12-14 05:33:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:34,656 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 05:33:34,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:34,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:34,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:34,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:33:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:34,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:34,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:34,981 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-14 05:33:34,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-12-14 05:33:35,016 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 05:33:35,017 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 31 treesize of output 27 [2022-12-14 05:33:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:35,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:33:35,102 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 05:33:35,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:35,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236019913] [2022-12-14 05:33:35,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236019913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:35,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:35,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:33:35,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891746897] [2022-12-14 05:33:35,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:35,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:33:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:35,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:33:35,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:35,104 INFO L87 Difference]: Start difference. First operand 4450 states and 18686 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 05:33:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:35,318 INFO L93 Difference]: Finished difference Result 4228 states and 17810 transitions. [2022-12-14 05:33:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:33:35,319 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 05:33:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:35,334 INFO L225 Difference]: With dead ends: 4228 [2022-12-14 05:33:35,335 INFO L226 Difference]: Without dead ends: 4228 [2022-12-14 05:33:35,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:35,335 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:35,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:33:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2022-12-14 05:33:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 4228. [2022-12-14 05:33:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4049 states have (on average 4.398616942454927) internal successors, (17810), 4227 states have internal predecessors, (17810), 0 states have call successors, (0), 0 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 05:33:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 17810 transitions. [2022-12-14 05:33:35,449 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 17810 transitions. Word has length 5 [2022-12-14 05:33:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:35,450 INFO L495 AbstractCegarLoop]: Abstraction has 4228 states and 17810 transitions. [2022-12-14 05:33:35,450 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 05:33:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 17810 transitions. [2022-12-14 05:33:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:33:35,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:35,450 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 05:33:35,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:35,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1636259295, now seen corresponding path program 2 times [2022-12-14 05:33:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:35,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560730821] [2022-12-14 05:33:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:33:35,653 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 05:33:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:35,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:35,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:35,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:33:35,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:33:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:33:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:35,918 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:35,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:36,054 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 05:33:36,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:36,747 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 05:33:36,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560730821] [2022-12-14 05:33:36,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560730821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525843745] [2022-12-14 05:33:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:33:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:33:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:33:36,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:33:36,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 05:33:36,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:33:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:33:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:33:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:37,084 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:37,085 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:37,166 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 05:33:37,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:37,293 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 05:33:37,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525843745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986845574] [2022-12-14 05:33:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:33:37,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:37,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:37,295 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:37,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:33:37,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:33:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:33:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:33:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:37,533 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:37,533 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:37,602 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 05:33:37,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:37,747 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 05:33:37,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986845574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:37,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:33:37,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 05:33:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515889299] [2022-12-14 05:33:37,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:37,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:33:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:33:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:33:37,748 INFO L87 Difference]: Start difference. First operand 4228 states and 17810 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:41,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:33:43,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:33:45,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:33:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:48,580 INFO L93 Difference]: Finished difference Result 33742 states and 142337 transitions. [2022-12-14 05:33:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:33:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:33:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:48,724 INFO L225 Difference]: With dead ends: 33742 [2022-12-14 05:33:48,725 INFO L226 Difference]: Without dead ends: 33742 [2022-12-14 05:33:48,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:33:48,725 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1322 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:48,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 174 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1351 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-12-14 05:33:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33742 states. [2022-12-14 05:33:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33742 to 4237. [2022-12-14 05:33:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4058 states have (on average 4.393297190734352) internal successors, (17828), 4236 states have internal predecessors, (17828), 0 states have call successors, (0), 0 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 05:33:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 17828 transitions. [2022-12-14 05:33:49,126 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 17828 transitions. Word has length 6 [2022-12-14 05:33:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:49,127 INFO L495 AbstractCegarLoop]: Abstraction has 4237 states and 17828 transitions. [2022-12-14 05:33:49,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 17828 transitions. [2022-12-14 05:33:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:33:49,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:49,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:33:49,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:33:49,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 05:33:49,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 05:33:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:33:49,730 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1595310873, now seen corresponding path program 1 times [2022-12-14 05:33:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:49,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099301645] [2022-12-14 05:33:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:49,734 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 05:33:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:49,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:49,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (14)] Waiting until timeout for monitored process [2022-12-14 05:33:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:33:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:49,902 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 05:33:49,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:49,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099301645] [2022-12-14 05:33:49,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099301645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:49,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:49,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:33:49,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434634008] [2022-12-14 05:33:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:49,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:33:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:49,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:33:49,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:49,903 INFO L87 Difference]: Start difference. First operand 4237 states and 17828 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:50,238 INFO L93 Difference]: Finished difference Result 5503 states and 22286 transitions. [2022-12-14 05:33:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:33:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:33:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:50,258 INFO L225 Difference]: With dead ends: 5503 [2022-12-14 05:33:50,258 INFO L226 Difference]: Without dead ends: 5503 [2022-12-14 05:33:50,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:50,259 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:50,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:33:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5503 states. [2022-12-14 05:33:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5503 to 5272. [2022-12-14 05:33:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5272 states, 5093 states have (on average 4.2670331827999215) internal successors, (21732), 5271 states have internal predecessors, (21732), 0 states have call successors, (0), 0 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 05:33:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 21732 transitions. [2022-12-14 05:33:50,401 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 21732 transitions. Word has length 6 [2022-12-14 05:33:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:50,401 INFO L495 AbstractCegarLoop]: Abstraction has 5272 states and 21732 transitions. [2022-12-14 05:33:50,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 21732 transitions. [2022-12-14 05:33:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:33:50,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:50,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:50,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (14)] Forceful destruction successful, exit code 0 [2022-12-14 05:33:50,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:50,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash 856523200, now seen corresponding path program 1 times [2022-12-14 05:33:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:50,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334926563] [2022-12-14 05:33:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:50,607 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 05:33:50,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:50,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:50,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Waiting until timeout for monitored process [2022-12-14 05:33:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:33:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:50,870 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:33:50,871 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:33:50,892 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:33:50,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 05:33:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:33:50,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:50,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334926563] [2022-12-14 05:33:50,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334926563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:50,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:50,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:33:50,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457571176] [2022-12-14 05:33:50,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:50,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:33:50,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:33:50,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:33:50,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:33:50,907 INFO L87 Difference]: Start difference. First operand 5272 states and 21732 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:51,069 INFO L93 Difference]: Finished difference Result 4094 states and 16676 transitions. [2022-12-14 05:33:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:33:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:33:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:51,080 INFO L225 Difference]: With dead ends: 4094 [2022-12-14 05:33:51,080 INFO L226 Difference]: Without dead ends: 4094 [2022-12-14 05:33:51,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 05:33:51,081 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:51,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:33:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2022-12-14 05:33:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 4094. [2022-12-14 05:33:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4002 states have (on average 4.166916541729136) internal successors, (16676), 4093 states have internal predecessors, (16676), 0 states have call successors, (0), 0 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 05:33:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 16676 transitions. [2022-12-14 05:33:51,153 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 16676 transitions. Word has length 7 [2022-12-14 05:33:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:51,153 INFO L495 AbstractCegarLoop]: Abstraction has 4094 states and 16676 transitions. [2022-12-14 05:33:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:33:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 16676 transitions. [2022-12-14 05:33:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:33:51,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:51,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:51,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:33:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:51,355 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:33:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash 856523201, now seen corresponding path program 1 times [2022-12-14 05:33:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:33:51,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621174344] [2022-12-14 05:33:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:51,358 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 05:33:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:33:51,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:51,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:33:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:33:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:51,675 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:51,675 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:51,844 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:33:51,845 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:33:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:51,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 05:33:51,954 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:33:51,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 05:33:51,988 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 05:33:51,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:54,681 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 05:33:54,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621174344] [2022-12-14 05:33:54,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621174344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260965747] [2022-12-14 05:33:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:54,681 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:33:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:33:54,682 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:33:54,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 05:33:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:33:54,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:55,039 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:33:55,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:33:55,214 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:33:55,214 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:33:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:55,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 05:33:55,346 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:33:55,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 05:33:55,371 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 05:33:55,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:02,910 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 05:34:02,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1260965747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711382549] [2022-12-14 05:34:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:02,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:02,912 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:02,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:34:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:34:03,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:03,183 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:34:03,183 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:34:03,400 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:34:03,400 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:34:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:03,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 05:34:03,499 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:34:03,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 05:34:03,539 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 05:34:03,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:04,601 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 05:34:04,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711382549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:04,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:34:04,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-12-14 05:34:04,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636871896] [2022-12-14 05:34:04,602 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:04,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:34:04,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:34:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=88, Unknown=2, NotChecked=0, Total=132 [2022-12-14 05:34:04,603 INFO L87 Difference]: Start difference. First operand 4094 states and 16676 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:14,430 WARN L233 SmtUtils]: Spent 9.71s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:34:23,568 WARN L233 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:34:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:35,947 INFO L93 Difference]: Finished difference Result 11522 states and 46696 transitions. [2022-12-14 05:34:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 05:34:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:34:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:35,989 INFO L225 Difference]: With dead ends: 11522 [2022-12-14 05:34:35,989 INFO L226 Difference]: Without dead ends: 11522 [2022-12-14 05:34:35,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=100, Invalid=240, Unknown=2, NotChecked=0, Total=342 [2022-12-14 05:34:35,990 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 395 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:35,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 92 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-14 05:34:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11522 states. [2022-12-14 05:34:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11522 to 5923. [2022-12-14 05:34:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5923 states, 5831 states have (on average 4.228091236494598) internal successors, (24654), 5922 states have internal predecessors, (24654), 0 states have call successors, (0), 0 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 05:34:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5923 states to 5923 states and 24654 transitions. [2022-12-14 05:34:36,143 INFO L78 Accepts]: Start accepts. Automaton has 5923 states and 24654 transitions. Word has length 7 [2022-12-14 05:34:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:36,143 INFO L495 AbstractCegarLoop]: Abstraction has 5923 states and 24654 transitions. [2022-12-14 05:34:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5923 states and 24654 transitions. [2022-12-14 05:34:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:34:36,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:36,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:36,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:36,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:36,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:36,747 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2085224717, now seen corresponding path program 1 times [2022-12-14 05:34:36,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:36,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425671790] [2022-12-14 05:34:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:36,749 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 05:34:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:36,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:36,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:36,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:34:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:37,078 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-14 05:34:37,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-14 05:34:37,153 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:34:37,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 05:34:37,209 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 05:34:37,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:37,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:37,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425671790] [2022-12-14 05:34:37,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425671790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:37,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:37,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:34:37,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529940202] [2022-12-14 05:34:37,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:37,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:34:37,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:34:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:34:37,211 INFO L87 Difference]: Start difference. First operand 5923 states and 24654 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:37,430 INFO L93 Difference]: Finished difference Result 5803 states and 24270 transitions. [2022-12-14 05:34:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:34:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:34:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:37,448 INFO L225 Difference]: With dead ends: 5803 [2022-12-14 05:34:37,448 INFO L226 Difference]: Without dead ends: 5803 [2022-12-14 05:34:37,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 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 05:34:37,449 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:37,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5803 states. [2022-12-14 05:34:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5803 to 5803. [2022-12-14 05:34:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5723 states have (on average 4.240782806220514) internal successors, (24270), 5802 states have internal predecessors, (24270), 0 states have call successors, (0), 0 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 05:34:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 24270 transitions. [2022-12-14 05:34:37,559 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 24270 transitions. Word has length 7 [2022-12-14 05:34:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:37,560 INFO L495 AbstractCegarLoop]: Abstraction has 5803 states and 24270 transitions. [2022-12-14 05:34:37,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 24270 transitions. [2022-12-14 05:34:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:34:37,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:37,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:37,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:37,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:37,762 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2085224718, now seen corresponding path program 1 times [2022-12-14 05:34:37,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939626097] [2022-12-14 05:34:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:37,765 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 05:34:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:37,767 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:37,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (20)] Waiting until timeout for monitored process [2022-12-14 05:34:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:37,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:34:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:38,070 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 05:34:38,071 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-12-14 05:34:38,096 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 05:34:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:38,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:34:38,223 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 05:34:38,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:38,223 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:38,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939626097] [2022-12-14 05:34:38,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939626097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:38,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:38,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:34:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267713991] [2022-12-14 05:34:38,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:38,225 INFO L87 Difference]: Start difference. First operand 5803 states and 24270 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:38,457 INFO L93 Difference]: Finished difference Result 5683 states and 23886 transitions. [2022-12-14 05:34:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:34:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:34:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:38,476 INFO L225 Difference]: With dead ends: 5683 [2022-12-14 05:34:38,476 INFO L226 Difference]: Without dead ends: 5683 [2022-12-14 05:34:38,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:38,477 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:38,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5683 states. [2022-12-14 05:34:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5683 to 5683. [2022-12-14 05:34:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5683 states, 5615 states have (on average 4.253962600178094) internal successors, (23886), 5682 states have internal predecessors, (23886), 0 states have call successors, (0), 0 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 05:34:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5683 states to 5683 states and 23886 transitions. [2022-12-14 05:34:38,592 INFO L78 Accepts]: Start accepts. Automaton has 5683 states and 23886 transitions. Word has length 7 [2022-12-14 05:34:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:38,592 INFO L495 AbstractCegarLoop]: Abstraction has 5683 states and 23886 transitions. [2022-12-14 05:34:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5683 states and 23886 transitions. [2022-12-14 05:34:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:34:38,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:38,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:38,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (20)] Ended with exit code 0 [2022-12-14 05:34:38,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:38,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 217450638, now seen corresponding path program 1 times [2022-12-14 05:34:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:38,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293369360] [2022-12-14 05:34:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:38,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:34:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:38,800 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:38,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 05:34:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:38,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:34:38,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:38,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 05:34:38,963 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 05:34:38,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:38,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293369360] [2022-12-14 05:34:38,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293369360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:38,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:38,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:34:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943258100] [2022-12-14 05:34:38,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:38,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:38,965 INFO L87 Difference]: Start difference. First operand 5683 states and 23886 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:39,175 INFO L93 Difference]: Finished difference Result 4167 states and 17376 transitions. [2022-12-14 05:34:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:34:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:34:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:39,188 INFO L225 Difference]: With dead ends: 4167 [2022-12-14 05:34:39,188 INFO L226 Difference]: Without dead ends: 4167 [2022-12-14 05:34:39,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 05:34:39,189 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:39,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2022-12-14 05:34:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4167. [2022-12-14 05:34:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4129 states have (on average 4.208282877209978) internal successors, (17376), 4166 states have internal predecessors, (17376), 0 states have call successors, (0), 0 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 05:34:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 17376 transitions. [2022-12-14 05:34:39,262 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 17376 transitions. Word has length 8 [2022-12-14 05:34:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:39,262 INFO L495 AbstractCegarLoop]: Abstraction has 4167 states and 17376 transitions. [2022-12-14 05:34:39,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 17376 transitions. [2022-12-14 05:34:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:34:39,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:39,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:39,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 05:34:39,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:39,464 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 217450639, now seen corresponding path program 1 times [2022-12-14 05:34:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:39,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385360269] [2022-12-14 05:34:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:39,465 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 05:34:39,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:39,466 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:39,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:34:39,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:39,614 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 05:34:39,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:39,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:39,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385360269] [2022-12-14 05:34:39,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385360269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:39,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:39,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:34:39,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947697734] [2022-12-14 05:34:39,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:39,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:39,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:39,616 INFO L87 Difference]: Start difference. First operand 4167 states and 17376 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:40,059 INFO L93 Difference]: Finished difference Result 5960 states and 23781 transitions. [2022-12-14 05:34:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:34:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:34:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:40,077 INFO L225 Difference]: With dead ends: 5960 [2022-12-14 05:34:40,077 INFO L226 Difference]: Without dead ends: 5960 [2022-12-14 05:34:40,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 05:34:40,078 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:40,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 18 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:34:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2022-12-14 05:34:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5722. [2022-12-14 05:34:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5684 states have (on average 4.093420126671358) internal successors, (23267), 5721 states have internal predecessors, (23267), 0 states have call successors, (0), 0 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 05:34:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 23267 transitions. [2022-12-14 05:34:40,183 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 23267 transitions. Word has length 8 [2022-12-14 05:34:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:40,184 INFO L495 AbstractCegarLoop]: Abstraction has 5722 states and 23267 transitions. [2022-12-14 05:34:40,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 23267 transitions. [2022-12-14 05:34:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:34:40,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:40,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:40,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:34:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:40,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1848741655, now seen corresponding path program 1 times [2022-12-14 05:34:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:40,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152220357] [2022-12-14 05:34:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:40,389 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 05:34:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:40,392 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:40,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:34:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:40,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:40,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:40,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:40,697 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 05:34:40,698 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-12-14 05:34:40,707 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 22 treesize of output 20 [2022-12-14 05:34:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:40,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:34:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:40,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:40,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:40,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152220357] [2022-12-14 05:34:40,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152220357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:40,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:40,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:34:40,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289304927] [2022-12-14 05:34:40,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:40,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:40,866 INFO L87 Difference]: Start difference. First operand 5722 states and 23267 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:41,144 INFO L93 Difference]: Finished difference Result 5379 states and 21875 transitions. [2022-12-14 05:34:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:34:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:34:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:41,160 INFO L225 Difference]: With dead ends: 5379 [2022-12-14 05:34:41,160 INFO L226 Difference]: Without dead ends: 5379 [2022-12-14 05:34:41,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:34:41,160 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:41,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2022-12-14 05:34:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 5379. [2022-12-14 05:34:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5351 states have (on average 4.088020930667165) internal successors, (21875), 5378 states have internal predecessors, (21875), 0 states have call successors, (0), 0 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 05:34:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 21875 transitions. [2022-12-14 05:34:41,256 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 21875 transitions. Word has length 9 [2022-12-14 05:34:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:41,256 INFO L495 AbstractCegarLoop]: Abstraction has 5379 states and 21875 transitions. [2022-12-14 05:34:41,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 21875 transitions. [2022-12-14 05:34:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:34:41,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:41,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:41,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:41,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:41,459 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1848741653, now seen corresponding path program 1 times [2022-12-14 05:34:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:41,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399932156] [2022-12-14 05:34:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:41,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:34:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:41,464 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:41,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:34:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:41,671 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-14 05:34:41,671 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 40 treesize of output 55 [2022-12-14 05:34:41,705 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:34:41,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 05:34:41,725 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 05:34:41,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:41,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:41,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399932156] [2022-12-14 05:34:41,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399932156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:41,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:41,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:34:41,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657804739] [2022-12-14 05:34:41,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:41,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:34:41,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:34:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:34:41,727 INFO L87 Difference]: Start difference. First operand 5379 states and 21875 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:41,917 INFO L93 Difference]: Finished difference Result 5036 states and 20483 transitions. [2022-12-14 05:34:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:34:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:34:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:41,933 INFO L225 Difference]: With dead ends: 5036 [2022-12-14 05:34:41,933 INFO L226 Difference]: Without dead ends: 5036 [2022-12-14 05:34:41,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 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 05:34:41,934 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:41,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 6 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:34:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2022-12-14 05:34:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 5036. [2022-12-14 05:34:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5036 states, 5018 states have (on average 4.081905141490633) internal successors, (20483), 5035 states have internal predecessors, (20483), 0 states have call successors, (0), 0 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 05:34:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5036 states to 5036 states and 20483 transitions. [2022-12-14 05:34:42,024 INFO L78 Accepts]: Start accepts. Automaton has 5036 states and 20483 transitions. Word has length 9 [2022-12-14 05:34:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:42,024 INFO L495 AbstractCegarLoop]: Abstraction has 5036 states and 20483 transitions. [2022-12-14 05:34:42,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5036 states and 20483 transitions. [2022-12-14 05:34:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:34:42,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:42,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:42,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:42,226 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1798900723, now seen corresponding path program 1 times [2022-12-14 05:34:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244693438] [2022-12-14 05:34:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:42,229 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 05:34:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:42,232 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:42,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Waiting until timeout for monitored process [2022-12-14 05:34:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:42,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:34:42,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:42,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:34:42,734 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 05:34:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:43,440 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 05:34:43,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244693438] [2022-12-14 05:34:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244693438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240468283] [2022-12-14 05:34:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:43,441 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:34:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:34:43,441 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:34:43,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 05:34:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:34:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:43,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:34:43,750 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 05:34:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:44,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240468283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51525937] [2022-12-14 05:34:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:44,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:44,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:44,062 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:44,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 05:34:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:34:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:44,164 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:34:44,253 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 05:34:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:44,582 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 05:34:44,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51525937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:44,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:34:44,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 9 [2022-12-14 05:34:44,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515828702] [2022-12-14 05:34:44,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:44,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:34:44,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:34:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:34:44,584 INFO L87 Difference]: Start difference. First operand 5036 states and 20483 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:49,973 INFO L93 Difference]: Finished difference Result 10082 states and 41357 transitions. [2022-12-14 05:34:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:34:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:34:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:50,003 INFO L225 Difference]: With dead ends: 10082 [2022-12-14 05:34:50,003 INFO L226 Difference]: Without dead ends: 10082 [2022-12-14 05:34:50,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:34:50,003 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 329 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:50,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 53 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 05:34:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10082 states. [2022-12-14 05:34:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10082 to 7349. [2022-12-14 05:34:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7331 states have (on average 4.151411812849543) internal successors, (30434), 7348 states have internal predecessors, (30434), 0 states have call successors, (0), 0 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 05:34:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 30434 transitions. [2022-12-14 05:34:50,162 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 30434 transitions. Word has length 9 [2022-12-14 05:34:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:50,162 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 30434 transitions. [2022-12-14 05:34:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 30434 transitions. [2022-12-14 05:34:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:34:50,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:50,163 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:34:50,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 05:34:50,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:34:50,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 05:34:50,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:34:50,765 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash 204499752, now seen corresponding path program 2 times [2022-12-14 05:34:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312189607] [2022-12-14 05:34:50,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:34:50,770 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 05:34:50,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:50,772 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:50,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (28)] Waiting until timeout for monitored process [2022-12-14 05:34:50,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:34:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:50,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:34:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:51,103 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:34:51,103 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:34:51,343 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:34:51,344 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:34:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:34:51,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 05:34:51,483 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:34:51,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 05:34:51,532 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 05:34:51,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:34:51,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:51,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312189607] [2022-12-14 05:34:51,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312189607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:34:51,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:34:51,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:34:51,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271861888] [2022-12-14 05:34:51,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:34:51,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:34:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:34:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:51,534 INFO L87 Difference]: Start difference. First operand 7349 states and 30434 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:34:51,833 INFO L93 Difference]: Finished difference Result 6123 states and 25212 transitions. [2022-12-14 05:34:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:34:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 05:34:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:34:51,852 INFO L225 Difference]: With dead ends: 6123 [2022-12-14 05:34:51,852 INFO L226 Difference]: Without dead ends: 6123 [2022-12-14 05:34:51,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:34:51,853 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:34:51,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:34:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6123 states. [2022-12-14 05:34:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6123 to 3844. [2022-12-14 05:34:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3838 states have (on average 4.0) internal successors, (15352), 3843 states have internal predecessors, (15352), 0 states have call successors, (0), 0 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 05:34:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 15352 transitions. [2022-12-14 05:34:51,939 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 15352 transitions. Word has length 10 [2022-12-14 05:34:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:34:51,940 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 15352 transitions. [2022-12-14 05:34:51,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:34:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 15352 transitions. [2022-12-14 05:34:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:34:51,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:34:51,941 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-12-14 05:34:51,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (28)] Ended with exit code 0 [2022-12-14 05:34:52,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:52,142 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:34:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:34:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1882649067, now seen corresponding path program 1 times [2022-12-14 05:34:52,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:34:52,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698054920] [2022-12-14 05:34:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:52,145 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 05:34:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:34:52,147 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:34:52,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 05:34:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:34:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:52,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:34:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:54,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:34:54,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698054920] [2022-12-14 05:34:54,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698054920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:54,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786541852] [2022-12-14 05:34:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:54,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:34:54,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:34:54,807 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:34:54,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 05:34:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:34:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:55,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:34:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:55,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786541852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:57,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216679354] [2022-12-14 05:34:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:34:57,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:34:57,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:34:57,572 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:34:57,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 05:34:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:34:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:57,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:34:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:58,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:34:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:58,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216679354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:34:58,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:34:58,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-12-14 05:34:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887504605] [2022-12-14 05:34:58,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:34:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 05:34:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:34:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 05:34:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 05:34:58,590 INFO L87 Difference]: Start difference. First operand 3844 states and 15352 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:35:02,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:04,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:06,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:08,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:10,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:12,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:13,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:15,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:17,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:19,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:20,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:23,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:25,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:26,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:32,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:34,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:38,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:43,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:44,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:35:49,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:01,571 INFO L93 Difference]: Finished difference Result 27465 states and 111345 transitions. [2022-12-14 05:36:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 05:36:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 05:36:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:01,667 INFO L225 Difference]: With dead ends: 27465 [2022-12-14 05:36:01,667 INFO L226 Difference]: Without dead ends: 27465 [2022-12-14 05:36:01,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1011, Invalid=1959, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 05:36:01,669 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 3139 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 76 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3139 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:01,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3139 Valid, 641 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3417 Invalid, 5 Unknown, 0 Unchecked, 51.7s Time] [2022-12-14 05:36:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27465 states. [2022-12-14 05:36:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27465 to 3868. [2022-12-14 05:36:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3862 states have (on average 3.988348006214397) internal successors, (15403), 3867 states have internal predecessors, (15403), 0 states have call successors, (0), 0 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 05:36:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 15403 transitions. [2022-12-14 05:36:01,914 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 15403 transitions. Word has length 10 [2022-12-14 05:36:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:01,914 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 15403 transitions. [2022-12-14 05:36:01,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 15403 transitions. [2022-12-14 05:36:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:36:01,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:01,915 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:36:01,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 05:36:02,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 05:36:02,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 05:36:02,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:36:02,518 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:36:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash 122536335, now seen corresponding path program 2 times [2022-12-14 05:36:02,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:36:02,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535953247] [2022-12-14 05:36:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:36:02,521 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 05:36:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:36:02,522 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:36:02,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Waiting until timeout for monitored process [2022-12-14 05:36:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:36:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:36:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:02,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:36:02,847 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 05:36:02,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:36:02,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:36:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535953247] [2022-12-14 05:36:02,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535953247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:36:02,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:36:02,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:36:02,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187829491] [2022-12-14 05:36:02,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:36:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:36:02,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:36:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:36:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:36:02,849 INFO L87 Difference]: Start difference. First operand 3868 states and 15403 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:36:03,085 INFO L93 Difference]: Finished difference Result 3252 states and 12835 transitions. [2022-12-14 05:36:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:36:03,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 05:36:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:36:03,094 INFO L225 Difference]: With dead ends: 3252 [2022-12-14 05:36:03,094 INFO L226 Difference]: Without dead ends: 3252 [2022-12-14 05:36:03,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:36:03,095 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:36:03,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:36:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2022-12-14 05:36:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2046. [2022-12-14 05:36:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2043 states have (on average 3.8262359275575135) internal successors, (7817), 2045 states have internal predecessors, (7817), 0 states have call successors, (0), 0 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 05:36:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 7817 transitions. [2022-12-14 05:36:03,138 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 7817 transitions. Word has length 12 [2022-12-14 05:36:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:36:03,138 INFO L495 AbstractCegarLoop]: Abstraction has 2046 states and 7817 transitions. [2022-12-14 05:36:03,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 7817 transitions. [2022-12-14 05:36:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 05:36:03,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:36:03,140 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-12-14 05:36:03,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:36:03,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:36:03,341 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:36:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:36:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1870061978, now seen corresponding path program 3 times [2022-12-14 05:36:03,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:36:03,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743150223] [2022-12-14 05:36:03,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:36:03,344 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 05:36:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:36:03,347 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:36:03,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:36:03,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 05:36:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:36:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:04,038 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:36:04,039 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:36:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:08,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:36:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743150223] [2022-12-14 05:36:08,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743150223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1706907260] [2022-12-14 05:36:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:36:08,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:36:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:36:08,174 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:36:08,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 05:36:09,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 05:36:09,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:36:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:09,491 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:36:09,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:36:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:09,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:14,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1706907260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869182149] [2022-12-14 05:36:14,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:36:14,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:36:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:36:14,917 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:36:14,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 05:36:21,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 05:36:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:36:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:36:21,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:36:21,296 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:36:21,297 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:36:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:21,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:36:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:36:28,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869182149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:36:28,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:36:28,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 49 [2022-12-14 05:36:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571884765] [2022-12-14 05:36:28,331 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:36:28,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 05:36:28,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:36:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 05:36:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=1905, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 05:36:28,333 INFO L87 Difference]: Start difference. First operand 2046 states and 7817 transitions. Second operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:36:46,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:48,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:50,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:52,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:54,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:56,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:36:58,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:00,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:02,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:04,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:06,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:08,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:10,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:12,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:14,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:16,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:18,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:20,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:22,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:23,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:25,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:27,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:29,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:31,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:37:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:37:48,520 INFO L93 Difference]: Finished difference Result 18796 states and 75360 transitions. [2022-12-14 05:37:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 05:37:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 05:37:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:37:48,573 INFO L225 Difference]: With dead ends: 18796 [2022-12-14 05:37:48,573 INFO L226 Difference]: Without dead ends: 18796 [2022-12-14 05:37:48,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 05:37:48,574 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 5813 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 5713 mSolverCounterSat, 540 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5813 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 6274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 5713 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:37:48,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5813 Valid, 1132 Invalid, 6274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 5713 Invalid, 21 Unknown, 0 Unchecked, 59.1s Time] [2022-12-14 05:37:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2022-12-14 05:37:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 2054. [2022-12-14 05:37:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2051 states have (on average 3.8176499268649438) internal successors, (7830), 2053 states have internal predecessors, (7830), 0 states have call successors, (0), 0 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 05:37:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7830 transitions. [2022-12-14 05:37:48,751 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7830 transitions. Word has length 13 [2022-12-14 05:37:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:37:48,752 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 7830 transitions. [2022-12-14 05:37:48,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:37:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7830 transitions. [2022-12-14 05:37:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 05:37:48,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:37:48,755 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1] [2022-12-14 05:37:48,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:37:48,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 05:37:49,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 05:37:49,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:37:49,357 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:37:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:37:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -823093639, now seen corresponding path program 2 times [2022-12-14 05:37:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:37:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209718803] [2022-12-14 05:37:49,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:37:49,361 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 05:37:49,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:37:49,364 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:37:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:37:49,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:37:49,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:37:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:37:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:49,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:37:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:50,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:56,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:37:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209718803] [2022-12-14 05:37:56,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209718803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223781842] [2022-12-14 05:37:56,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:37:56,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:37:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:37:56,534 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:37:56,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 05:37:56,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:37:56,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:37:56,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:37:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:57,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:37:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:57,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:57,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223781842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:57,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752161048] [2022-12-14 05:37:57,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:37:57,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:37:57,931 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:37:57,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 05:37:58,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:37:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:37:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:37:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:58,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 05:37:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:58,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:37:59,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752161048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:59,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:37:59,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 35 [2022-12-14 05:37:59,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701524856] [2022-12-14 05:37:59,135 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:37:59,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 05:37:59,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:37:59,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 05:37:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:37:59,136 INFO L87 Difference]: Start difference. First operand 2054 states and 7830 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:38:13,571 WARN L233 SmtUtils]: Spent 7.48s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:38:16,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:18,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:20,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:22,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:24,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:26,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:28,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:30,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:32,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:34,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:36,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:38,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:40,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:42,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:44,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:46,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:38:54,455 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:39:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:39:43,500 INFO L93 Difference]: Finished difference Result 43190 states and 173890 transitions. [2022-12-14 05:39:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 05:39:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 05:39:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:39:43,636 INFO L225 Difference]: With dead ends: 43190 [2022-12-14 05:39:43,636 INFO L226 Difference]: Without dead ends: 43190 [2022-12-14 05:39:43,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=934, Invalid=1718, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:39:43,637 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 10207 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 9142 mSolverCounterSat, 178 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10207 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 9335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 9142 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:39:43,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10207 Valid, 1813 Invalid, 9335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [178 Valid, 9142 Invalid, 15 Unknown, 0 Unchecked, 58.9s Time] [2022-12-14 05:39:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43190 states. [2022-12-14 05:39:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43190 to 2090. [2022-12-14 05:39:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2087 states have (on average 3.7862961188308577) internal successors, (7902), 2089 states have internal predecessors, (7902), 0 states have call successors, (0), 0 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 05:39:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 7902 transitions. [2022-12-14 05:39:43,976 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 7902 transitions. Word has length 19 [2022-12-14 05:39:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:39:43,976 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 7902 transitions. [2022-12-14 05:39:43,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:39:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 7902 transitions. [2022-12-14 05:39:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 05:39:43,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:39:43,981 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1] [2022-12-14 05:39:43,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:39:44,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 05:39:44,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-12-14 05:39:44,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:39:44,584 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:39:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:39:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1311773025, now seen corresponding path program 4 times [2022-12-14 05:39:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:39:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276612355] [2022-12-14 05:39:44,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:39:44,588 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 05:39:44,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:39:44,589 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:39:44,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (39)] Waiting until timeout for monitored process [2022-12-14 05:39:44,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:39:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:39:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 05:39:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:39:45,004 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:39:45,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:39:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:46,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:39:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:39:59,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:39:59,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276612355] [2022-12-14 05:39:59,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276612355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:39:59,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897601855] [2022-12-14 05:39:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:39:59,771 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:39:59,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:39:59,772 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:39:59,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 05:40:00,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:40:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:40:00,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 05:40:00,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:40:00,477 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:40:00,477 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:40:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:02,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:40:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:04,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [897601855] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:40:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839809185] [2022-12-14 05:40:04,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:40:04,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:40:04,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:40:04,102 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:40:04,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 05:40:04,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:40:04,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:40:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 05:40:04,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:40:04,501 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:40:04,501 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:40:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:04,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:40:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:40:05,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839809185] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:40:05,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:40:05,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 66 [2022-12-14 05:40:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796890518] [2022-12-14 05:40:05,940 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:40:05,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 05:40:05,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:40:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 05:40:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 05:40:05,942 INFO L87 Difference]: Start difference. First operand 2090 states and 7902 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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 05:40:54,445 WARN L233 SmtUtils]: Spent 23.07s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:41:18,738 WARN L233 SmtUtils]: Spent 21.49s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:41:35,519 WARN L233 SmtUtils]: Spent 13.85s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:41:38,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:40,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:42,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:44,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:46,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:48,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:50,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:52,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:54,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:56,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:41:58,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:00,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:02,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:04,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:06,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:08,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:10,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:12,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:14,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:16,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:18,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:20,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:22,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:24,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:42:36,786 WARN L233 SmtUtils]: Spent 10.33s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:42:46,911 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:42:59,696 WARN L233 SmtUtils]: Spent 9.77s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:10,634 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:26,453 WARN L233 SmtUtils]: Spent 13.19s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:36,630 WARN L233 SmtUtils]: Spent 7.68s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:46,157 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:55,415 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:44:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:32,871 INFO L93 Difference]: Finished difference Result 34242 states and 137668 transitions. [2022-12-14 05:44:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 05:44:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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 26 [2022-12-14 05:44:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:32,985 INFO L225 Difference]: With dead ends: 34242 [2022-12-14 05:44:32,985 INFO L226 Difference]: Without dead ends: 34242 [2022-12-14 05:44:32,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 190.9s TimeCoverageRelationStatistics Valid=2843, Invalid=5713, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:44:32,987 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 7055 mSDsluCounter, 5007 mSDsCounter, 0 mSdLazyCounter, 25939 mSolverCounterSat, 1518 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7055 SdHoareTripleChecker+Valid, 5156 SdHoareTripleChecker+Invalid, 27481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1518 IncrementalHoareTripleChecker+Valid, 25939 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:32,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7055 Valid, 5156 Invalid, 27481 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1518 Valid, 25939 Invalid, 24 Unknown, 0 Unchecked, 90.7s Time] [2022-12-14 05:44:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34242 states. [2022-12-14 05:44:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34242 to 2116. [2022-12-14 05:44:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2113 states have (on average 3.764316138192144) internal successors, (7954), 2115 states have internal predecessors, (7954), 0 states have call successors, (0), 0 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 05:44:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7954 transitions. [2022-12-14 05:44:33,265 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7954 transitions. Word has length 26 [2022-12-14 05:44:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:33,266 INFO L495 AbstractCegarLoop]: Abstraction has 2116 states and 7954 transitions. [2022-12-14 05:44:33,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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 05:44:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7954 transitions. [2022-12-14 05:44:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 05:44:33,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:33,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:33,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 05:44:33,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:33,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 (39)] Ended with exit code 0 [2022-12-14 05:44:33,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:33,873 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:44:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:33,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1568855375, now seen corresponding path program 1 times [2022-12-14 05:44:33,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:33,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121863014] [2022-12-14 05:44:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:33,875 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 05:44:33,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:33,876 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:33,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Waiting until timeout for monitored process [2022-12-14 05:44:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:44:34,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:34,121 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 05:44:34,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:34,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121863014] [2022-12-14 05:44:34,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121863014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:34,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:34,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:44:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379891203] [2022-12-14 05:44:34,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:34,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:44:34,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:44:34,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:34,122 INFO L87 Difference]: Start difference. First operand 2116 states and 7954 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 05:44:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:34,506 INFO L93 Difference]: Finished difference Result 2386 states and 9072 transitions. [2022-12-14 05:44:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:44:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2022-12-14 05:44:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:34,513 INFO L225 Difference]: With dead ends: 2386 [2022-12-14 05:44:34,513 INFO L226 Difference]: Without dead ends: 1976 [2022-12-14 05:44:34,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:44:34,513 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:34,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 12 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:44:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-12-14 05:44:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1710. [2022-12-14 05:44:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1707 states have (on average 3.8658465143526657) internal successors, (6599), 1709 states have internal predecessors, (6599), 0 states have call successors, (0), 0 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 05:44:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 6599 transitions. [2022-12-14 05:44:34,542 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 6599 transitions. Word has length 27 [2022-12-14 05:44:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:34,542 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 6599 transitions. [2022-12-14 05:44:34,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 05:44:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 6599 transitions. [2022-12-14 05:44:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 05:44:34,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:34,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:34,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:44:34,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:34,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:44:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1595176133, now seen corresponding path program 1 times [2022-12-14 05:44:34,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:34,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959971921] [2022-12-14 05:44:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:34,750 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 05:44:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:34,752 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:34,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:44:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:35,305 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 05:44:35,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:35,507 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 05:44:35,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959971921] [2022-12-14 05:44:35,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959971921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776363733] [2022-12-14 05:44:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:35,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:44:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:44:35,509 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:44:35,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 05:44:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:44:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:36,249 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 05:44:36,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:36,408 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 05:44:36,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776363733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805572156] [2022-12-14 05:44:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:36,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:44:36,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:44:36,410 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:44:36,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 05:44:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:36,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:44:36,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:37,067 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 05:44:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:37,349 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 05:44:37,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805572156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:37,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:44:37,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 9, 6, 10, 7] total 23 [2022-12-14 05:44:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032057349] [2022-12-14 05:44:37,350 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:44:37,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 05:44:37,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 05:44:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:44:37,351 INFO L87 Difference]: Start difference. First operand 1710 states and 6599 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 05:44:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:45,200 INFO L93 Difference]: Finished difference Result 8527 states and 32868 transitions. [2022-12-14 05:44:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 05:44:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 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 30 [2022-12-14 05:44:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:45,227 INFO L225 Difference]: With dead ends: 8527 [2022-12-14 05:44:45,227 INFO L226 Difference]: Without dead ends: 8527 [2022-12-14 05:44:45,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:44:45,228 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 479 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:45,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 79 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 05:44:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2022-12-14 05:44:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 4425. [2022-12-14 05:44:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4422 states have (on average 3.9009497964721844) internal successors, (17250), 4424 states have internal predecessors, (17250), 0 states have call successors, (0), 0 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 05:44:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 17250 transitions. [2022-12-14 05:44:45,344 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 17250 transitions. Word has length 30 [2022-12-14 05:44:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:45,344 INFO L495 AbstractCegarLoop]: Abstraction has 4425 states and 17250 transitions. [2022-12-14 05:44:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 05:44:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 17250 transitions. [2022-12-14 05:44:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 05:44:45,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:45,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:45,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Ended with exit code 0 [2022-12-14 05:44:45,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:45,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:44:45,954 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:44:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1834351637, now seen corresponding path program 2 times [2022-12-14 05:44:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:45,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939227695] [2022-12-14 05:44:45,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:44:45,958 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 05:44:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:45,959 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:45,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:46,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:44:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:44:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:44:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:44:46,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:46,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:46,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939227695] [2022-12-14 05:44:46,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939227695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:46,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:46,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:44:46,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201739359] [2022-12-14 05:44:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:46,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:44:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:44:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:46,344 INFO L87 Difference]: Start difference. First operand 4425 states and 17250 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 05:44:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:46,998 INFO L93 Difference]: Finished difference Result 6229 states and 24334 transitions. [2022-12-14 05:44:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:44:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-12-14 05:44:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:47,018 INFO L225 Difference]: With dead ends: 6229 [2022-12-14 05:44:47,019 INFO L226 Difference]: Without dead ends: 6229 [2022-12-14 05:44:47,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:44:47,019 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:47,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 21 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:44:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6229 states. [2022-12-14 05:44:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6229 to 4053. [2022-12-14 05:44:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4050 states have (on average 3.840493827160494) internal successors, (15554), 4052 states have internal predecessors, (15554), 0 states have call successors, (0), 0 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 05:44:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 15554 transitions. [2022-12-14 05:44:47,112 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 15554 transitions. Word has length 30 [2022-12-14 05:44:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:47,113 INFO L495 AbstractCegarLoop]: Abstraction has 4053 states and 15554 transitions. [2022-12-14 05:44:47,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 05:44:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 15554 transitions. [2022-12-14 05:44:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 05:44:47,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:47,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:47,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:47,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:47,321 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-14 05:44:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:47,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1154780766, now seen corresponding path program 1 times [2022-12-14 05:44:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:47,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772662303] [2022-12-14 05:44:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:47,324 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 05:44:47,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:47,327 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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 05:44:47,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/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)] Waiting until timeout for monitored process [2022-12-14 05:44:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:47,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 05:44:47,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:47,678 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 22 treesize of output 20 [2022-12-14 05:44:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:48,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 05:44:48,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:48,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 05:44:48,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 05:44:48,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:44:48,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 05:44:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:44:48,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:51,054 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2552 (Array (_ BitVec 32) (_ BitVec 8)))) (not (bvsle (bvadd c_~total~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2552) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset))))) (_ bv0 32)))) is different from false [2022-12-14 05:44:51,096 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2551 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2552 (Array (_ BitVec 32) (_ BitVec 8)))) (not (bvsle (bvadd c_~total~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2551) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2552) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset))))) (_ bv0 32)))) is different from false [2022-12-14 05:44:51,154 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2551 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2550 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2552 (Array (_ BitVec 32) (_ BitVec 8)))) (not (bvsle (bvadd c_~total~0 (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2550) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2551) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2552) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset))))) (_ bv0 32)))) is different from false [2022-12-14 05:44:51,364 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 05:44:51,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 3236 treesize of output 2969 [2022-12-14 05:44:51,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:44:51,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2910 treesize of output 2478 [2022-12-14 05:44:51,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:44:51,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2478 treesize of output 2262 [2022-12-14 05:44:51,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:44:51,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2262 treesize of output 1398 [2022-12-14 05:45:53,424 WARN L233 SmtUtils]: Spent 57.27s on a formula simplification. DAG size of input: 228 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:45:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:45:55,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:45:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772662303] [2022-12-14 05:45:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772662303] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:45:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1004896240] [2022-12-14 05:45:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:45:55,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:45:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:45:55,075 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:45:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-12-14 05:45:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:45:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 05:45:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:45:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:55,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:55,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-14 05:45:56,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 05:45:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:57,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-12-14 05:45:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:58,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-12-14 05:45:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:58,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-12-14 05:45:59,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 19 [2022-12-14 05:45:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:45:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:46:03,483 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2606 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2608 (Array (_ BitVec 32) (_ BitVec 8))) (~q1_back~0 (_ BitVec 32)) (v_ArrVal_2605 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse7 (bvmul (_ bv4 32) ~q1_back~0))) (let ((.cse1 (bvadd .cse7 (_ bv3 32) c_~q1~0.offset)) (.cse2 (bvadd .cse7 (_ bv2 32) c_~q1~0.offset)) (.cse3 (bvadd .cse7 c_~q1~0.offset (_ bv1 32))) (.cse4 (bvadd .cse7 c_~q1~0.offset)) (.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2605))) (or (not (bvsgt (let ((.cse0 (select .cse5 c_~q1~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))) (_ bv0 32))) (not (bvslt ~q1_back~0 c_~n1~0)) (not (bvsge ~q1_back~0 (_ bv0 32))) (not (bvsle (bvadd c_~total~0 (let ((.cse6 (select (store (store (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2606) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2608) c_~q1~0.base))) (concat (concat (concat (select .cse6 .cse1) (select .cse6 .cse2)) (select .cse6 .cse3)) (select .cse6 .cse4)))) (_ bv0 32))))))) is different from false [2022-12-14 05:46:03,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:03,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 441 treesize of output 204 [2022-12-14 05:46:03,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:03,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6419 treesize of output 6104 [2022-12-14 05:46:03,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 6046 treesize of output 4318 [2022-12-14 05:46:03,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:03,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4376 treesize of output 4133 [2022-12-14 05:46:03,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:03,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4102 treesize of output 3238 [2022-12-14 05:46:04,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:04,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3238 treesize of output 2806 [2022-12-14 05:46:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:46:08,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1004896240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:46:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528709400] [2022-12-14 05:46:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:46:08,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:46:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:46:08,516 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:46:08,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_589f9614-5c8b-4597-814b-b5064f6eb7dc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 05:46:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:46:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 05:46:08,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:46:08,736 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 22 treesize of output 20 [2022-12-14 05:46:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 05:46:09,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 05:46:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 05:46:10,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 05:46:10,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 05:46:11,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:11,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 05:46:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:46:11,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:46:16,381 WARN L837 $PredicateComparison]: unable to prove that (forall ((~q1_back~0 (_ BitVec 32)) (v_ArrVal_2667 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2666 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2669 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2668 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse7 (bvmul (_ bv4 32) ~q1_back~0))) (let ((.cse1 (bvadd .cse7 (_ bv3 32) c_~q1~0.offset)) (.cse2 (bvadd .cse7 (_ bv2 32) c_~q1~0.offset)) (.cse3 (bvadd .cse7 c_~q1~0.offset (_ bv1 32))) (.cse4 (bvadd .cse7 c_~q1~0.offset)) (.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2666))) (or (not (bvsle (bvadd c_~total~0 (let ((.cse0 (select (store (store (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2667) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2668) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_2669) c_~q1~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4)))) (_ bv0 32))) (not (bvsgt (let ((.cse6 (select .cse5 c_~q1~0.base))) (concat (concat (concat (select .cse6 .cse1) (select .cse6 .cse2)) (select .cse6 .cse3)) (select .cse6 .cse4))) (_ bv0 32))) (not (bvslt ~q1_back~0 c_~n1~0)) (not (bvsge ~q1_back~0 (_ bv0 32))))))) is different from false [2022-12-14 05:46:16,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:16,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 441 treesize of output 204 [2022-12-14 05:46:16,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:16,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1667 treesize of output 1562 [2022-12-14 05:46:16,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1504 treesize of output 1288 [2022-12-14 05:46:16,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1288 treesize of output 856 [2022-12-14 05:46:16,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 856 treesize of output 748 [2022-12-14 05:46:16,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:46:16,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 806 treesize of output 725 [2022-12-14 05:46:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:46:21,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528709400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:46:21,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:46:21,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 48 [2022-12-14 05:46:21,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642777707] [2022-12-14 05:46:21,705 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:46:21,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 05:46:21,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:46:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 05:46:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1664, Unknown=37, NotChecked=450, Total=2450 [2022-12-14 05:46:21,707 INFO L87 Difference]: Start difference. First operand 4053 states and 15554 transitions. Second operand has 50 states, 49 states have (on average 2.938775510204082) internal successors, (144), 49 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 05:46:27,744 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 287 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:48,644 WARN L233 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 132 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:50,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 05:46:52,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 05:47:09,817 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 87 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:47:17,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 05:47:21,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:23,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:25,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:27,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:30,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:32,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:34,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:36,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:47:38,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]