./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/lis-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/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_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/lis-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/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_283bc9c5-bc82-498b-a656-867b04b07603/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 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf --- 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 07:37:12,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:37:12,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:37:12,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:37:12,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:37:12,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:37:12,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:37:12,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:37:12,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:37:12,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:37:12,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:37:12,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:37:12,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:37:12,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:37:12,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:37:12,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:37:12,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:37:12,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:37:12,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:37:12,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:37:12,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:37:12,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:37:12,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:37:12,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:37:12,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:37:12,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:37:12,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:37:12,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:37:12,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:37:12,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:37:12,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:37:12,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:37:12,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:37:12,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:37:12,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:37:12,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:37:12,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:37:12,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:37:12,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:37:12,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:37:12,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:37:12,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:37:12,295 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:37:12,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:37:12,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:37:12,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:37:12,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:37:12,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:37:12,297 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:37:12,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:37:12,297 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:37:12,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:37:12,298 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:37:12,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:37:12,298 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:37:12,298 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:37:12,299 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:37:12,299 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:37:12,299 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:37:12,299 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:37:12,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:37:12,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:37:12,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:37:12,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:37:12,301 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:37:12,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:37:12,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:37:12,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:37:12,301 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:37:12,301 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:37:12,302 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:37:12,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:37:12,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:37:12,302 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:37:12,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:37:12,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:37:12,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:37:12,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:37:12,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:37:12,303 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:37:12,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:37:12,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:37:12,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:37:12,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:37:12,304 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_283bc9c5-bc82-498b-a656-867b04b07603/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf [2022-12-14 07:37:12,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:37:12,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:37:12,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:37:12,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:37:12,526 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:37:12,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2022-12-14 07:37:15,144 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:37:15,336 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:37:15,337 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2022-12-14 07:37:15,347 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data/031021ac5/26ee8e4063994b00aa3cbadcd955e9c2/FLAGfaead6599 [2022-12-14 07:37:15,359 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data/031021ac5/26ee8e4063994b00aa3cbadcd955e9c2 [2022-12-14 07:37:15,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:37:15,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:37:15,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:37:15,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:37:15,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:37:15,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:37:15" (1/1) ... [2022-12-14 07:37:15,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b469dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:15, skipping insertion in model container [2022-12-14 07:37:15,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:37:15" (1/1) ... [2022-12-14 07:37:15,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:37:15,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:37:15,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:37:15,643 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 07:37:15,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48824c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:15, skipping insertion in model container [2022-12-14 07:37:15,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:37:15,644 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 07:37:15,646 INFO L158 Benchmark]: Toolchain (without parser) took 282.80ms. Allocated memory is still 115.3MB. Free memory was 73.1MB in the beginning and 61.2MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:37:15,646 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 115.3MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:37:15,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.58ms. Allocated memory is still 115.3MB. Free memory was 72.7MB in the beginning and 61.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:37:15,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 115.3MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.58ms. Allocated memory is still 115.3MB. Free memory was 72.7MB in the beginning and 61.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 515]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/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_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/lis-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/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_283bc9c5-bc82-498b-a656-867b04b07603/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 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf --- 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 07:37:17,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:37:17,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:37:17,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:37:17,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:37:17,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:37:17,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:37:17,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:37:17,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:37:17,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:37:17,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:37:17,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:37:17,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:37:17,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:37:17,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:37:17,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:37:17,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:37:17,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:37:17,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:37:17,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:37:17,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:37:17,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:37:17,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:37:17,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:37:17,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:37:17,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:37:17,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:37:17,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:37:17,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:37:17,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:37:17,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:37:17,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:37:17,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:37:17,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:37:17,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:37:17,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:37:17,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:37:17,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:37:17,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:37:17,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:37:17,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:37:17,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 07:37:17,225 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:37:17,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:37:17,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:37:17,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:37:17,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:37:17,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:37:17,227 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:37:17,227 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:37:17,227 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:37:17,228 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:37:17,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:37:17,228 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:37:17,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:37:17,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:37:17,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:37:17,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:37:17,229 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:37:17,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:37:17,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:37:17,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:37:17,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:37:17,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:37:17,231 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:37:17,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:37:17,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:37:17,231 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 07:37:17,231 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 07:37:17,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:37:17,232 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:37:17,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:37:17,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 07:37:17,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:37:17,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:37:17,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:37:17,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:37:17,237 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 07:37:17,237 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:17,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:37:17,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 07:37:17,237 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_283bc9c5-bc82-498b-a656-867b04b07603/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 319f31ab0b5c801309acd19f3e336c9a25177d3201cf5ea4438ad6227d5f71cf [2022-12-14 07:37:17,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:37:17,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:37:17,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:37:17,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:37:17,507 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:37:17,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2022-12-14 07:37:20,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:37:20,347 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:37:20,347 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/sv-benchmarks/c/array-memsafety/lis-alloca-1.i [2022-12-14 07:37:20,359 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data/74d402514/b44508e74fc84679a761856156c78844/FLAGa9956def6 [2022-12-14 07:37:20,373 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/data/74d402514/b44508e74fc84679a761856156c78844 [2022-12-14 07:37:20,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:37:20,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:37:20,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:37:20,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:37:20,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:37:20,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec79989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20, skipping insertion in model container [2022-12-14 07:37:20,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:37:20,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:37:20,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:37:20,677 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 07:37:20,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:37:20,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:37:20,717 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:37:20,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:37:20,781 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:37:20,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20 WrapperNode [2022-12-14 07:37:20,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:37:20,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:37:20,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:37:20,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:37:20,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,820 INFO L138 Inliner]: procedures = 117, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2022-12-14 07:37:20,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:37:20,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:37:20,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:37:20,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:37:20,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:37:20,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:37:20,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:37:20,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:37:20,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (1/1) ... [2022-12-14 07:37:20,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:37:20,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:20,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:37:20,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:37:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:37:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:37:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:37:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:37:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:37:20,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:37:21,008 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:37:21,009 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:37:21,402 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:37:21,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:37:21,408 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 07:37:21,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:37:21 BoogieIcfgContainer [2022-12-14 07:37:21,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:37:21,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:37:21,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:37:21,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:37:21,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:37:20" (1/3) ... [2022-12-14 07:37:21,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173129a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:37:21, skipping insertion in model container [2022-12-14 07:37:21,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:37:20" (2/3) ... [2022-12-14 07:37:21,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@173129a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:37:21, skipping insertion in model container [2022-12-14 07:37:21,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:37:21" (3/3) ... [2022-12-14 07:37:21,415 INFO L112 eAbstractionObserver]: Analyzing ICFG lis-alloca-1.i [2022-12-14 07:37:21,428 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:37:21,428 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-12-14 07:37:21,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:37:21,463 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;@2da4d4dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:37:21,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-12-14 07:37:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 41 states have (on average 1.951219512195122) internal successors, (80), 66 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 07:37:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:37:21,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:21,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:37:21,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-12-14 07:37:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979233814] [2022-12-14 07:37:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:21,489 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 07:37:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:21,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:21,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:37:21,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:21,605 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 07:37:21,619 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 07:37:21,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:21,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:21,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979233814] [2022-12-14 07:37:21,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979233814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:21,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:21,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:37:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809465227] [2022-12-14 07:37:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:21,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:37:21,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:37:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:37:21,649 INFO L87 Difference]: Start difference. First operand has 67 states, 41 states have (on average 1.951219512195122) internal successors, (80), 66 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) Second operand has 3 states, 2 states have (on average 3.0) 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 07:37:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:21,775 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-12-14 07:37:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:37:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 07:37:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:21,783 INFO L225 Difference]: With dead ends: 66 [2022-12-14 07:37:21,783 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 07:37:21,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:37:21,786 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:21,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:37:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 07:37:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 07:37:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 07:37:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-12-14 07:37:21,809 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 6 [2022-12-14 07:37:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:21,810 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-12-14 07:37:21,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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 07:37:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-12-14 07:37:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:37:21,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:21,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:37:21,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:22,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:22,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-12-14 07:37:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217278742] [2022-12-14 07:37:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:37:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:22,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:22,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:37:22,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:22,206 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 5 [2022-12-14 07:37:22,240 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 07:37:22,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:22,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217278742] [2022-12-14 07:37:22,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217278742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:22,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:22,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:37:22,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474731573] [2022-12-14 07:37:22,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:22,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:37:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:37:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:37:22,244 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:22,570 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-12-14 07:37:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:37:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:37:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:22,572 INFO L225 Difference]: With dead ends: 129 [2022-12-14 07:37:22,572 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 07:37:22,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:37:22,573 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 74 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:22,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 275 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:37:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 07:37:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 67. [2022-12-14 07:37:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.744186046511628) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 07:37:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-12-14 07:37:22,579 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 6 [2022-12-14 07:37:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:22,579 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-12-14 07:37:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-12-14 07:37:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:37:22,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:22,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:37:22,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 07:37:22,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:22,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-12-14 07:37:22,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:22,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198231003] [2022-12-14 07:37:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:22,788 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 07:37:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:22,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:22,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:37:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:22,908 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 07:37:22,963 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 07:37:22,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:22,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198231003] [2022-12-14 07:37:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198231003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:22,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:37:22,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614108088] [2022-12-14 07:37:22,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:22,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:37:22,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:37:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:37:22,965 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:23,178 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2022-12-14 07:37:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:37:23,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:37:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:23,180 INFO L225 Difference]: With dead ends: 71 [2022-12-14 07:37:23,180 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 07:37:23,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:37:23,181 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 74 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:23,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 109 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:37:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 07:37:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-12-14 07:37:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 07:37:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-12-14 07:37:23,185 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 6 [2022-12-14 07:37:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:23,185 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-12-14 07:37:23,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-12-14 07:37:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:37:23,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:23,186 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:23,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:23,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:23,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-12-14 07:37:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:23,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779671231] [2022-12-14 07:37:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:23,393 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 07:37:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:23,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:23,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 07:37:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:37:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:23,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:23,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779671231] [2022-12-14 07:37:23,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779671231] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:23,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1558222474] [2022-12-14 07:37:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:23,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:23,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 07:37:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:37:23,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:23,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1558222474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481158828] [2022-12-14 07:37:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:23,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:23,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:23,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:23,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:37:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:37:23,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:23,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:23,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481158828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:23,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:23,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 07:37:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396550610] [2022-12-14 07:37:23,796 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:23,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:37:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:37:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:37:23,797 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:23,872 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2022-12-14 07:37:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:37:23,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:37:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:23,874 INFO L225 Difference]: With dead ends: 127 [2022-12-14 07:37:23,874 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 07:37:23,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:37:23,875 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 247 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:23,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 258 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:37:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 07:37:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 72. [2022-12-14 07:37:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 71 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 07:37:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-12-14 07:37:23,879 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 10 [2022-12-14 07:37:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:23,883 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-12-14 07:37:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-12-14 07:37:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:37:23,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:23,884 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:23,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:24,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:37:24,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:24,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-12-14 07:37:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:24,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776515196] [2022-12-14 07:37:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:24,491 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 07:37:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:24,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:24,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:24,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:37:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:24,554 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 07:37:24,693 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 07:37:24,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:25,016 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 07:37:25,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776515196] [2022-12-14 07:37:25,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776515196] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710875367] [2022-12-14 07:37:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:25,017 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:25,018 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:25,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 07:37:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:37:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:25,129 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 07:37:25,217 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 07:37:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:25,330 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 07:37:25,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710875367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855862564] [2022-12-14 07:37:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:25,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:25,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:37:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:37:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:25,386 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 07:37:25,442 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 07:37:25,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:25,559 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 07:37:25,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855862564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:25,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:25,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-12-14 07:37:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070467890] [2022-12-14 07:37:25,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:25,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:37:25,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:37:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:37:25,561 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:26,687 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2022-12-14 07:37:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:37:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:37:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:26,689 INFO L225 Difference]: With dead ends: 140 [2022-12-14 07:37:26,689 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 07:37:26,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:37:26,691 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 484 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:26,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 244 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:37:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 07:37:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2022-12-14 07:37:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:37:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-12-14 07:37:26,696 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 10 [2022-12-14 07:37:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:26,696 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-12-14 07:37:26,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-12-14 07:37:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:37:26,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:26,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:26,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:37:26,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:27,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 07:37:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:27,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -680998152, now seen corresponding path program 1 times [2022-12-14 07:37:27,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:27,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249000596] [2022-12-14 07:37:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:27,303 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 07:37:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:27,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:27,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:27,424 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:37:27,424 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 19 treesize of output 22 [2022-12-14 07:37:27,434 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 07:37:27,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:27,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:27,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249000596] [2022-12-14 07:37:27,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249000596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:27,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:27,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:37:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861345448] [2022-12-14 07:37:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:27,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:37:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:37:27,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:37:27,436 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:27,548 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-12-14 07:37:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:37:27,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:37:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:27,549 INFO L225 Difference]: With dead ends: 77 [2022-12-14 07:37:27,549 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 07:37:27,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 07:37:27,550 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:27,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:37:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 07:37:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 07:37:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 07:37:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-12-14 07:37:27,554 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 12 [2022-12-14 07:37:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:27,554 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-12-14 07:37:27,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-12-14 07:37:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:37:27,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:27,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:27,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:27,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2022-12-14 07:37:27,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133230626] [2022-12-14 07:37:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:27,758 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 07:37:27,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:27,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:27,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 07:37:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:37:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:27,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 07:37:27,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:37:27,892 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 07:37:27,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:27,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:27,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133230626] [2022-12-14 07:37:27,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133230626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:27,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:27,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:37:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000794601] [2022-12-14 07:37:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:27,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:37:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:37:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:37:27,894 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:28,109 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2022-12-14 07:37:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:37:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:37:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:28,111 INFO L225 Difference]: With dead ends: 132 [2022-12-14 07:37:28,111 INFO L226 Difference]: Without dead ends: 132 [2022-12-14 07:37:28,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 07:37:28,112 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 67 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:28,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 139 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:37:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-14 07:37:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2022-12-14 07:37:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 79 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-12-14 07:37:28,117 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 12 [2022-12-14 07:37:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:28,117 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-12-14 07:37:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-12-14 07:37:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:37:28,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:28,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:28,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:28,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:28,321 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2022-12-14 07:37:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:28,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190799691] [2022-12-14 07:37:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:28,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:37:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:28,326 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:28,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 07:37:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:37:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:28,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:28,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 07:37:28,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:37:28,469 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 07:37:28,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:28,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190799691] [2022-12-14 07:37:28,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190799691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:28,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:28,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:37:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359855686] [2022-12-14 07:37:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:28,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:37:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:37:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:37:28,471 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:28,796 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2022-12-14 07:37:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:37:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:37:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:28,798 INFO L225 Difference]: With dead ends: 87 [2022-12-14 07:37:28,798 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 07:37:28,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:37:28,798 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 73 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:28,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 104 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:37:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 07:37:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2022-12-14 07:37:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.467741935483871) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-12-14 07:37:28,801 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 12 [2022-12-14 07:37:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:28,801 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-12-14 07:37:28,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-12-14 07:37:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:37:28,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:28,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:28,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 07:37:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:29,003 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 363893777, now seen corresponding path program 1 times [2022-12-14 07:37:29,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:29,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212884070] [2022-12-14 07:37:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:29,007 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 07:37:29,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:29,009 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:29,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:37:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:29,082 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 07:37:29,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2022-12-14 07:37:29,091 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 07:37:29,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:29,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:29,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212884070] [2022-12-14 07:37:29,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212884070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:29,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:29,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:37:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204239543] [2022-12-14 07:37:29,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:29,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:37:29,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:29,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:37:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:37:29,092 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:29,168 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-12-14 07:37:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:37:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:37:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:29,169 INFO L225 Difference]: With dead ends: 77 [2022-12-14 07:37:29,169 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 07:37:29,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 07:37:29,170 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:29,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 54 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:37:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 07:37:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 07:37:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.435483870967742) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:37:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-12-14 07:37:29,173 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 13 [2022-12-14 07:37:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:29,173 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-12-14 07:37:29,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-12-14 07:37:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:37:29,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:29,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:29,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 07:37:29,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:29,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash 363893778, now seen corresponding path program 1 times [2022-12-14 07:37:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:29,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133171286] [2022-12-14 07:37:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:29,378 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 07:37:29,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:29,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:29,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:37:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:29,527 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 07:37:29,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 07:37:29,551 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 07:37:29,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:29,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:29,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133171286] [2022-12-14 07:37:29,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133171286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:29,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:29,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:37:29,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434913493] [2022-12-14 07:37:29,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:29,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:37:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:37:29,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:37:29,552 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:29,723 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2022-12-14 07:37:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:37:29,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:37:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:29,725 INFO L225 Difference]: With dead ends: 128 [2022-12-14 07:37:29,725 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 07:37:29,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 07:37:29,725 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:29,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 133 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:37:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 07:37:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2022-12-14 07:37:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 07:37:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-12-14 07:37:29,728 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2022-12-14 07:37:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:29,728 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-12-14 07:37:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-12-14 07:37:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:37:29,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:29,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:29,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:29,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958356, now seen corresponding path program 1 times [2022-12-14 07:37:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793937710] [2022-12-14 07:37:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:29,932 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 07:37:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:29,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:29,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:37:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:30,047 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 07:37:30,047 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 07:37:30,096 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 07:37:30,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:30,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:30,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793937710] [2022-12-14 07:37:30,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793937710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:30,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:30,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:37:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191095796] [2022-12-14 07:37:30,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:37:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:37:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:37:30,097 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:30,369 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-12-14 07:37:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:37:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:37:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:30,370 INFO L225 Difference]: With dead ends: 84 [2022-12-14 07:37:30,370 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 07:37:30,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:37:30,371 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:30,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 99 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:37:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 07:37:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-12-14 07:37:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2022-12-14 07:37:30,373 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 13 [2022-12-14 07:37:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:30,373 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2022-12-14 07:37:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2022-12-14 07:37:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:37:30,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:30,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:30,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:30,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:30,575 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1808065813, now seen corresponding path program 1 times [2022-12-14 07:37:30,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:30,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769175281] [2022-12-14 07:37:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:30,578 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 07:37:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:30,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:30,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 07:37:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:37:30,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:30,667 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 07:37:30,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:30,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769175281] [2022-12-14 07:37:30,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769175281] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:30,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:37:30,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:37:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532201926] [2022-12-14 07:37:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:30,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:37:30,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:37:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:37:30,668 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 07:37:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:30,896 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2022-12-14 07:37:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:37:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-12-14 07:37:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:30,898 INFO L225 Difference]: With dead ends: 128 [2022-12-14 07:37:30,898 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 07:37:30,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 07:37:30,898 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 59 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:30,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 208 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:37:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 07:37:30,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2022-12-14 07:37:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 79 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-12-14 07:37:30,900 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 15 [2022-12-14 07:37:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:30,901 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-12-14 07:37:30,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 07:37:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-12-14 07:37:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:37:30,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:30,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:30,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 07:37:31,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:31,102 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1221259799, now seen corresponding path program 1 times [2022-12-14 07:37:31,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:31,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536199510] [2022-12-14 07:37:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:31,103 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 07:37:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:31,104 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:31,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 07:37:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:37:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:31,288 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 07:37:31,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:31,361 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 07:37:31,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536199510] [2022-12-14 07:37:31,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536199510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1820273878] [2022-12-14 07:37:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:31,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:31,363 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:31,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 07:37:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:37:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:31,489 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 07:37:31,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:31,527 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 07:37:31,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1820273878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:31,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875063352] [2022-12-14 07:37:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:31,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:31,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:31,528 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:31,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 07:37:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:31,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:37:31,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:31,672 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 07:37:31,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:37:31,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875063352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:37:31,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 07:37:31,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6, 7, 6] total 15 [2022-12-14 07:37:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49918428] [2022-12-14 07:37:31,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:37:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:37:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:37:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:37:31,674 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 07:37:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:31,846 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-12-14 07:37:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:37:31,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-12-14 07:37:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:31,848 INFO L225 Difference]: With dead ends: 89 [2022-12-14 07:37:31,848 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 07:37:31,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:37:31,848 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:31,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 136 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:37:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 07:37:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-12-14 07:37:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.391304347826087) internal successors, (96), 83 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 07:37:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-12-14 07:37:31,851 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 15 [2022-12-14 07:37:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:31,851 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-12-14 07:37:31,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 07:37:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-12-14 07:37:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:37:31,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:31,852 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:31,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 07:37:32,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 07:37:32,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 07:37:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:32,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash 262068158, now seen corresponding path program 1 times [2022-12-14 07:37:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:32,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701178463] [2022-12-14 07:37:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:32,456 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 07:37:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:32,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:32,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:32,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:37:32,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:37:32,614 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:32,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701178463] [2022-12-14 07:37:32,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701178463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:32,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [7288762] [2022-12-14 07:37:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:32,615 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:32,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 07:37:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:32,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:37:32,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:37:32,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [7288762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216491422] [2022-12-14 07:37:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:32,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:32,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:32,766 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:32,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 07:37:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:32,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:37:32,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:37:32,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216491422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:32,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:32,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 07:37:32,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102051926] [2022-12-14 07:37:32,882 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:37:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:37:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:37:32,884 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 07:37:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:33,108 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-12-14 07:37:33,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:37:33,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:37:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:33,110 INFO L225 Difference]: With dead ends: 104 [2022-12-14 07:37:33,110 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:37:33,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:37:33,110 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 45 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:33,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:37:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:37:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2022-12-14 07:37:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 07:37:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-12-14 07:37:33,114 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 16 [2022-12-14 07:37:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:33,114 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-12-14 07:37:33,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 07:37:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-12-14 07:37:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:37:33,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:33,115 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:33,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:33,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:33,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 07:37:33,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:33,717 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash -749049092, now seen corresponding path program 1 times [2022-12-14 07:37:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:33,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352305679] [2022-12-14 07:37:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:33,720 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 07:37:33,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:33,723 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:33,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:37:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:33,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:34,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352305679] [2022-12-14 07:37:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352305679] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120252275] [2022-12-14 07:37:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:34,092 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:34,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 07:37:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:37:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:34,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:34,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120252275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999953799] [2022-12-14 07:37:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:34,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:34,345 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:34,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 07:37:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:34,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:37:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:34,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:34,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999953799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:34,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:34,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 19 [2022-12-14 07:37:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411420453] [2022-12-14 07:37:34,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:34,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:37:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:37:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-12-14 07:37:34,481 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 07:37:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:35,048 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2022-12-14 07:37:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:37:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 16 [2022-12-14 07:37:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:35,049 INFO L225 Difference]: With dead ends: 120 [2022-12-14 07:37:35,049 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 07:37:35,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:37:35,050 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 164 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:35,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 348 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:37:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 07:37:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2022-12-14 07:37:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 07:37:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-12-14 07:37:35,053 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 16 [2022-12-14 07:37:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:35,054 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-12-14 07:37:35,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 07:37:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-12-14 07:37:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:37:35,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:35,054 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] [2022-12-14 07:37:35,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 07:37:35,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:35,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:35,657 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -302012765, now seen corresponding path program 1 times [2022-12-14 07:37:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:35,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805675699] [2022-12-14 07:37:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:35,658 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 07:37:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:35,659 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:35,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 07:37:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:35,863 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 07:37:35,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:36,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:37:36,068 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 07:37:36,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:36,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805675699] [2022-12-14 07:37:36,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805675699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:36,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1459131966] [2022-12-14 07:37:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:36,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:36,069 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:36,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 07:37:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:36,243 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 07:37:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:36,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:37:36,340 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 07:37:36,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1459131966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:36,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059635346] [2022-12-14 07:37:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:36,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:36,342 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 07:37:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:37:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:36,440 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 07:37:36,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:36,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:37:36,523 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 07:37:36,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059635346] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:36,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:36,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-12-14 07:37:36,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630300812] [2022-12-14 07:37:36,523 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:36,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:37:36,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:37:36,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:37:36,524 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:37,076 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2022-12-14 07:37:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:37:37,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 07:37:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:37,078 INFO L225 Difference]: With dead ends: 159 [2022-12-14 07:37:37,078 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 07:37:37,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:37:37,078 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 258 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:37,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 142 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:37:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 07:37:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2022-12-14 07:37:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.3829787234042554) internal successors, (130), 107 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2022-12-14 07:37:37,082 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 20 [2022-12-14 07:37:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:37,082 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2022-12-14 07:37:37,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:37:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2022-12-14 07:37:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:37:37,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:37,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:37,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 07:37:37,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 07:37:37,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:37,686 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646975, now seen corresponding path program 2 times [2022-12-14 07:37:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435828314] [2022-12-14 07:37:37,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:37:37,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:37:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:37,691 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:37,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 07:37:37,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:37:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:37:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:37:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:37,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 07:37:37,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:37:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:37:37,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:38,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:37:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:37:38,245 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435828314] [2022-12-14 07:37:38,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435828314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [307785445] [2022-12-14 07:37:38,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:37:38,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:38,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:38,246 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:38,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 07:37:38,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:37:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:37:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:37:38,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:37:38,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 07:37:38,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:37:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:38,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:38,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:37:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:39,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [307785445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:39,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818193774] [2022-12-14 07:37:39,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:37:39,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:39,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:39,183 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:39,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 07:37:39,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:37:39,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:37:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 07:37:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:39,264 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 07:37:39,644 INFO L321 Elim1Store]: treesize reduction 50, result has 20.6 percent of original size [2022-12-14 07:37:39,644 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 2 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 07:37:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:39,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:41,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818193774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:41,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:41,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 8, 10, 10] total 35 [2022-12-14 07:37:41,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904510885] [2022-12-14 07:37:41,052 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:41,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 07:37:41,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 07:37:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:37:41,054 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 07:37:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:44,822 INFO L93 Difference]: Finished difference Result 210 states and 239 transitions. [2022-12-14 07:37:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:37:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 07:37:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:44,824 INFO L225 Difference]: With dead ends: 210 [2022-12-14 07:37:44,824 INFO L226 Difference]: Without dead ends: 210 [2022-12-14 07:37:44,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=658, Invalid=2312, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 07:37:44,825 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1524 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:44,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 599 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 07:37:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-14 07:37:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 116. [2022-12-14 07:37:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 115 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 07:37:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2022-12-14 07:37:44,829 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 20 [2022-12-14 07:37:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:44,829 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2022-12-14 07:37:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 07:37:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2022-12-14 07:37:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:37:44,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:44,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:37:44,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:45,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:45,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 07:37:45,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:45,432 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:45,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:45,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1786415948, now seen corresponding path program 1 times [2022-12-14 07:37:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:45,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709877318] [2022-12-14 07:37:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:45,435 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 07:37:45,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:45,438 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:45,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:37:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:45,565 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 07:37:45,565 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 07:37:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:37:45,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:37:46,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:46,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709877318] [2022-12-14 07:37:46,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709877318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:46,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1172689604] [2022-12-14 07:37:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:46,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:46,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:46,230 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:46,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 07:37:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:37:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:46,594 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:37:46,595 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 1 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 07:37:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:46,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:47,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1172689604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:47,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960723678] [2022-12-14 07:37:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:37:47,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:47,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:47,265 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:47,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 07:37:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:37:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:37:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:47,375 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 07:37:47,376 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 07:37:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:37:47,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:37:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960723678] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:47,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 8, 5, 5] total 25 [2022-12-14 07:37:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738751891] [2022-12-14 07:37:47,638 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:37:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:37:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:37:47,640 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 07:37:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:37:51,557 INFO L93 Difference]: Finished difference Result 237 states and 282 transitions. [2022-12-14 07:37:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:37:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 21 [2022-12-14 07:37:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:37:51,560 INFO L225 Difference]: With dead ends: 237 [2022-12-14 07:37:51,560 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 07:37:51,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=458, Invalid=1612, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 07:37:51,561 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 887 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:37:51,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 582 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 07:37:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 07:37:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 131. [2022-12-14 07:37:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 117 states have (on average 1.393162393162393) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 07:37:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2022-12-14 07:37:51,566 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 21 [2022-12-14 07:37:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:37:51,566 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2022-12-14 07:37:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 07:37:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2022-12-14 07:37:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:37:51,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:37:51,567 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 07:37:51,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 07:37:51,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 07:37:51,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:52,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:37:52,169 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:37:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:37:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2022-12-14 07:37:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:37:52,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407204926] [2022-12-14 07:37:52,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:37:52,171 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 07:37:52,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:37:52,174 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:37:52,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:37:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:37:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:37:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:52,242 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 07:37:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:53,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:37:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407204926] [2022-12-14 07:37:53,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407204926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:53,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451200841] [2022-12-14 07:37:53,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:37:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:37:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:37:53,741 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:37:53,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 07:37:53,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:37:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:37:53,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:37:53,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:53,862 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 07:37:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:54,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:54,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451200841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:54,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096126287] [2022-12-14 07:37:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:37:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:37:54,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:37:54,478 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:37:54,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 07:37:54,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:37:54,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:37:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:37:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:37:54,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:37:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:54,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:37:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:37:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096126287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:37:56,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:37:56,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 25 [2022-12-14 07:37:56,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668723249] [2022-12-14 07:37:56,504 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:37:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:37:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:37:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:37:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:37:56,505 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 07:38:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:38:02,419 INFO L93 Difference]: Finished difference Result 421 states and 536 transitions. [2022-12-14 07:38:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:38:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 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 22 [2022-12-14 07:38:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:38:02,421 INFO L225 Difference]: With dead ends: 421 [2022-12-14 07:38:02,421 INFO L226 Difference]: Without dead ends: 421 [2022-12-14 07:38:02,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:38:02,422 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1400 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:38:02,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 917 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 07:38:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-12-14 07:38:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 155. [2022-12-14 07:38:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 141 states have (on average 1.3687943262411348) internal successors, (193), 154 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 07:38:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2022-12-14 07:38:02,428 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 22 [2022-12-14 07:38:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:38:02,428 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2022-12-14 07:38:02,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 07:38:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2022-12-14 07:38:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 07:38:02,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:38:02,429 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] [2022-12-14 07:38:02,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 07:38:02,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 07:38:02,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 07:38:03,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:38:03,031 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:38:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:38:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1547664583, now seen corresponding path program 1 times [2022-12-14 07:38:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:38:03,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226523546] [2022-12-14 07:38:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:03,034 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 07:38:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:38:03,037 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:03,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:38:03,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:03,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:38:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:03,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:03,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2022-12-14 07:38:03,205 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 45 treesize of output 41 [2022-12-14 07:38:03,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:03,359 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 58 treesize of output 26 [2022-12-14 07:38:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:38:03,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:38:03,498 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_698 (Array (_ BitVec 32) (_ BitVec 8)))) (bvslt |c_ULTIMATE.start_lis_~max~0#1| (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_lis_~prev~0#1.base| v_ArrVal_698) |c_ULTIMATE.start_lis_~best~0#1.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_lis_~best~0#1.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_lis_~best~0#1.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_lis_~best~0#1.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_lis_~best~0#1.offset|))))) is different from false [2022-12-14 07:38:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:03,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:03,531 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 99 [2022-12-14 07:38:03,631 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-14 07:38:03,631 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 119 treesize of output 102 [2022-12-14 07:38:03,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:03,719 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 23 treesize of output 9 [2022-12-14 07:38:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:38:03,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:38:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226523546] [2022-12-14 07:38:03,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226523546] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:38:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861202959] [2022-12-14 07:38:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:03,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:38:03,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:38:03,831 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:38:03,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 07:38:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:38:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:04,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:38:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:04,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 38 [2022-12-14 07:38:04,108 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 35 treesize of output 33 [2022-12-14 07:38:04,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:04,250 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 50 treesize of output 22 [2022-12-14 07:38:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:38:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:38:04,326 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_730 (Array (_ BitVec 32) (_ BitVec 8)))) (bvslt |c_ULTIMATE.start_lis_~max~0#1| (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_lis_~prev~0#1.base| v_ArrVal_730) |c_ULTIMATE.start_lis_~best~0#1.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_lis_~best~0#1.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_lis_~best~0#1.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_lis_~best~0#1.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_lis_~best~0#1.offset|))))) is different from false [2022-12-14 07:38:04,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:04,355 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 199 treesize of output 98 [2022-12-14 07:38:04,432 INFO L321 Elim1Store]: treesize reduction 100, result has 23.7 percent of original size [2022-12-14 07:38:04,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 105 treesize of output 87 [2022-12-14 07:38:04,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:04,438 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 23 treesize of output 9 [2022-12-14 07:38:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:38:04,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861202959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:38:04,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291581082] [2022-12-14 07:38:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:04,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:38:04,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:38:04,576 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:38:04,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 07:38:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:38:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:04,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:38:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:04,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-12-14 07:38:04,742 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 25 treesize of output 25 [2022-12-14 07:38:04,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:04,856 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 42 treesize of output 18 [2022-12-14 07:38:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:38:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:38:04,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:05,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:05,011 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 195 treesize of output 97 [2022-12-14 07:38:05,054 INFO L321 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-12-14 07:38:05,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 72 [2022-12-14 07:38:05,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:38:05,096 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 23 treesize of output 9 [2022-12-14 07:38:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:38:05,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291581082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:38:05,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:38:05,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 22 [2022-12-14 07:38:05,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687006816] [2022-12-14 07:38:05,164 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:38:05,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 07:38:05,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:38:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 07:38:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=301, Unknown=3, NotChecked=74, Total=462 [2022-12-14 07:38:05,166 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 07:38:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:38:06,821 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-12-14 07:38:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:38:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 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 07:38:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:38:06,823 INFO L225 Difference]: With dead ends: 197 [2022-12-14 07:38:06,823 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 07:38:06,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=403, Unknown=3, NotChecked=90, Total=650 [2022-12-14 07:38:06,824 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:38:06,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 397 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 277 Invalid, 0 Unknown, 130 Unchecked, 1.5s Time] [2022-12-14 07:38:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 07:38:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 179. [2022-12-14 07:38:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 165 states have (on average 1.4181818181818182) internal successors, (234), 178 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 07:38:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2022-12-14 07:38:06,830 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 26 [2022-12-14 07:38:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:38:06,830 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2022-12-14 07:38:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 07:38:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2022-12-14 07:38:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:38:06,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:38:06,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:38:06,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:07,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 07:38:07,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 07:38:07,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:38:07,433 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:38:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:38:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1090844182, now seen corresponding path program 1 times [2022-12-14 07:38:07,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:38:07,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897963194] [2022-12-14 07:38:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:07,436 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 07:38:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:38:07,438 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:07,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:38:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:07,556 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 07:38:07,592 INFO L321 Elim1Store]: treesize reduction 42, result has 35.4 percent of original size [2022-12-14 07:38:07,592 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 2 case distinctions, treesize of input 17 treesize of output 35 [2022-12-14 07:38:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:38:07,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:38:07,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:38:07,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897963194] [2022-12-14 07:38:07,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897963194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:38:07,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:38:07,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:38:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940617369] [2022-12-14 07:38:07,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:38:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:38:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:38:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:38:07,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:38:07,637 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 07:38:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:38:07,749 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2022-12-14 07:38:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:38:07,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 07:38:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:38:07,751 INFO L225 Difference]: With dead ends: 177 [2022-12-14 07:38:07,751 INFO L226 Difference]: Without dead ends: 177 [2022-12-14 07:38:07,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:38:07,752 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 83 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:38:07,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:38:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-14 07:38:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-12-14 07:38:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.3575757575757577) internal successors, (224), 176 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 07:38:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 224 transitions. [2022-12-14 07:38:07,755 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 224 transitions. Word has length 27 [2022-12-14 07:38:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:38:07,756 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 224 transitions. [2022-12-14 07:38:07,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 07:38:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 224 transitions. [2022-12-14 07:38:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:38:07,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:38:07,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:38:07,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-12-14 07:38:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:38:07,958 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:38:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:38:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1090844181, now seen corresponding path program 1 times [2022-12-14 07:38:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:38:07,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341992179] [2022-12-14 07:38:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:07,960 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 07:38:07,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:38:07,963 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:07,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 07:38:08,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:08,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:38:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:08,277 INFO L321 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-12-14 07:38:08,278 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 07:38:08,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:38:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:38:08,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:38:08,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:38:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:38:09,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:38:09,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341992179] [2022-12-14 07:38:09,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341992179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:38:09,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356888153] [2022-12-14 07:38:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:38:09,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:38:09,459 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:38:09,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 07:38:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 07:38:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:09,692 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 07:38:09,697 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 07:38:10,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:10,031 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-12-14 07:38:10,031 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 07:38:10,042 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:38:10,042 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 07:38:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:38:10,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:38:21,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:38:21,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356888153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:38:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786289893] [2022-12-14 07:38:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:38:21,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:38:21,783 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:38:21,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 07:38:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 07:38:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:21,883 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 07:38:21,888 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 07:38:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:38:22,109 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-12-14 07:38:22,110 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 07:38:22,126 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:38:22,127 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 07:38:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:38:22,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:38:26,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:38:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:38:26,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786289893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:38:26,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:38:26,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9, 8, 9, 8] total 34 [2022-12-14 07:38:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148790105] [2022-12-14 07:38:26,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:38:26,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 07:38:26,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:38:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 07:38:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1005, Unknown=3, NotChecked=0, Total=1190 [2022-12-14 07:38:26,160 INFO L87 Difference]: Start difference. First operand 177 states and 224 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:38:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:38:37,907 INFO L93 Difference]: Finished difference Result 397 states and 488 transitions. [2022-12-14 07:38:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 07:38:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 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 07:38:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:38:37,909 INFO L225 Difference]: With dead ends: 397 [2022-12-14 07:38:37,909 INFO L226 Difference]: Without dead ends: 397 [2022-12-14 07:38:37,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=746, Invalid=2791, Unknown=3, NotChecked=0, Total=3540 [2022-12-14 07:38:37,909 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2368 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2368 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:38:37,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2368 Valid, 328 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 07:38:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-12-14 07:38:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 250. [2022-12-14 07:38:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 238 states have (on average 1.3445378151260505) internal successors, (320), 249 states have internal predecessors, (320), 0 states have call successors, (0), 0 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 07:38:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 320 transitions. [2022-12-14 07:38:37,913 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 320 transitions. Word has length 27 [2022-12-14 07:38:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:38:37,913 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 320 transitions. [2022-12-14 07:38:37,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:38:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 320 transitions. [2022-12-14 07:38:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:38:37,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:38:37,914 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] [2022-12-14 07:38:37,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-12-14 07:38:38,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-12-14 07:38:38,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 07:38:38,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:38:38,516 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:38:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:38:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash -397297604, now seen corresponding path program 1 times [2022-12-14 07:38:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:38:38,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311397023] [2022-12-14 07:38:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:38:38,519 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 07:38:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:38:38,521 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:38,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:38:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:38:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:38:38,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:38:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:38:44,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:38:44,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:38:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311397023] [2022-12-14 07:38:44,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311397023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:38:44,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:38:44,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:38:44,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916946528] [2022-12-14 07:38:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:38:44,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:38:44,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:38:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:38:44,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=27, Unknown=2, NotChecked=0, Total=42 [2022-12-14 07:38:44,950 INFO L87 Difference]: Start difference. First operand 250 states and 320 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 07:38:46,967 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 07:38:48,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:38:50,976 WARN L539 Checker$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 07:38:52,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:38:54,990 WARN L539 Checker$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 07:38:57,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:38:59,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:39:01,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:39:03,016 WARN L539 Checker$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 07:39:05,173 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 07:39:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:05,174 INFO L93 Difference]: Finished difference Result 249 states and 319 transitions. [2022-12-14 07:39:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:39:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2022-12-14 07:39:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:05,177 INFO L225 Difference]: With dead ends: 249 [2022-12-14 07:39:05,177 INFO L226 Difference]: Without dead ends: 223 [2022-12-14 07:39:05,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13, Invalid=27, Unknown=2, NotChecked=0, Total=42 [2022-12-14 07:39:05,178 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:05,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 125 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 10 Unknown, 0 Unchecked, 20.2s Time] [2022-12-14 07:39:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-12-14 07:39:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-12-14 07:39:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 212 states have (on average 1.3537735849056605) internal successors, (287), 222 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 07:39:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 287 transitions. [2022-12-14 07:39:05,181 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 287 transitions. Word has length 28 [2022-12-14 07:39:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:05,181 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 287 transitions. [2022-12-14 07:39:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 07:39:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 287 transitions. [2022-12-14 07:39:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:39:05,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:05,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:05,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:05,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:39:05,383 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash 543568764, now seen corresponding path program 1 times [2022-12-14 07:39:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:05,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869271473] [2022-12-14 07:39:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:05,386 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 07:39:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:05,389 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:05,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:05,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:39:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:05,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:05,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869271473] [2022-12-14 07:39:05,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869271473] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:05,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:39:05,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:39:05,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183895904] [2022-12-14 07:39:05,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:05,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:39:05,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:05,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:39:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:39:05,618 INFO L87 Difference]: Start difference. First operand 223 states and 287 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 07:39:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:05,934 INFO L93 Difference]: Finished difference Result 313 states and 404 transitions. [2022-12-14 07:39:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:39:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 28 [2022-12-14 07:39:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:05,935 INFO L225 Difference]: With dead ends: 313 [2022-12-14 07:39:05,935 INFO L226 Difference]: Without dead ends: 313 [2022-12-14 07:39:05,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:39:05,936 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 215 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:05,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-12-14 07:39:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 229. [2022-12-14 07:39:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 228 states have internal predecessors, (293), 0 states have call successors, (0), 0 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 07:39:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 293 transitions. [2022-12-14 07:39:05,940 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 293 transitions. Word has length 28 [2022-12-14 07:39:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:05,940 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 293 transitions. [2022-12-14 07:39:05,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 07:39:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 293 transitions. [2022-12-14 07:39:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 07:39:05,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:05,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:05,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 07:39:06,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:39:06,141 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1430352431, now seen corresponding path program 1 times [2022-12-14 07:39:06,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:06,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928565159] [2022-12-14 07:39:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:06,144 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 07:39:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:06,147 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:06,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 07:39:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:39:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:06,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:06,572 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 27 treesize of output 23 [2022-12-14 07:39:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:06,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:06,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928565159] [2022-12-14 07:39:06,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928565159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:06,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711994993] [2022-12-14 07:39:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:06,750 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:39:06,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:39:06,751 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:39:06,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 07:39:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:39:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:07,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:07,150 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 27 treesize of output 23 [2022-12-14 07:39:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:07,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711994993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:07,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824232777] [2022-12-14 07:39:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:07,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:07,216 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:07,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 07:39:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:39:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:07,494 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 27 treesize of output 23 [2022-12-14 07:39:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:07,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824232777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:07,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:39:07,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-12-14 07:39:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566925002] [2022-12-14 07:39:07,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:39:07,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:39:07,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:39:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:39:07,559 INFO L87 Difference]: Start difference. First operand 229 states and 293 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:39:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:08,596 INFO L93 Difference]: Finished difference Result 458 states and 589 transitions. [2022-12-14 07:39:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:39:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 07:39:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:08,598 INFO L225 Difference]: With dead ends: 458 [2022-12-14 07:39:08,598 INFO L226 Difference]: Without dead ends: 441 [2022-12-14 07:39:08,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:39:08,598 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 504 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:08,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 146 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:39:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-12-14 07:39:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 208. [2022-12-14 07:39:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 197 states have (on average 1.3350253807106598) internal successors, (263), 207 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 07:39:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 263 transitions. [2022-12-14 07:39:08,602 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 263 transitions. Word has length 31 [2022-12-14 07:39:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:08,602 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 263 transitions. [2022-12-14 07:39:08,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:39:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 263 transitions. [2022-12-14 07:39:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:39:08,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:08,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:08,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 07:39:08,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 07:39:09,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 07:39:09,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:09,203 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1391261449, now seen corresponding path program 1 times [2022-12-14 07:39:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268203121] [2022-12-14 07:39:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:09,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:39:09,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:09,205 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:09,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 07:39:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:09,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:39:09,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:09,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:39:09,326 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:09,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268203121] [2022-12-14 07:39:09,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268203121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:39:09,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:39:09,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:39:09,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342175438] [2022-12-14 07:39:09,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:39:09,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:39:09,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:39:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:39:09,328 INFO L87 Difference]: Start difference. First operand 208 states and 263 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 07:39:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:09,338 INFO L93 Difference]: Finished difference Result 210 states and 262 transitions. [2022-12-14 07:39:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:39:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 32 [2022-12-14 07:39:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:09,338 INFO L225 Difference]: With dead ends: 210 [2022-12-14 07:39:09,338 INFO L226 Difference]: Without dead ends: 210 [2022-12-14 07:39:09,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 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 07:39:09,339 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:09,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:39:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-14 07:39:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-12-14 07:39:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 200 states have (on average 1.31) internal successors, (262), 209 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 07:39:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 262 transitions. [2022-12-14 07:39:09,343 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 262 transitions. Word has length 32 [2022-12-14 07:39:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:09,343 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 262 transitions. [2022-12-14 07:39:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 07:39:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 262 transitions. [2022-12-14 07:39:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:39:09,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:09,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:09,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-12-14 07:39:09,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:39:09,544 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1391252418, now seen corresponding path program 1 times [2022-12-14 07:39:09,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:09,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22520330] [2022-12-14 07:39:09,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:09,545 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 07:39:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:09,546 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 07:39:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:39:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:09,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:09,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:39:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:10,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:10,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22520330] [2022-12-14 07:39:10,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22520330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:10,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922482707] [2022-12-14 07:39:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:10,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:39:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:39:10,186 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:39:10,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 07:39:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:10,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:39:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:10,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:39:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:10,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922482707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:10,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089611826] [2022-12-14 07:39:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:10,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:10,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:10,673 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:10,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 07:39:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:39:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:10,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:10,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:39:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:11,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089611826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:11,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:39:11,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2022-12-14 07:39:11,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45113708] [2022-12-14 07:39:11,055 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:39:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:39:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:39:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:39:11,055 INFO L87 Difference]: Start difference. First operand 210 states and 262 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 07:39:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:12,434 INFO L93 Difference]: Finished difference Result 701 states and 880 transitions. [2022-12-14 07:39:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:39:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 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 32 [2022-12-14 07:39:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:12,436 INFO L225 Difference]: With dead ends: 701 [2022-12-14 07:39:12,436 INFO L226 Difference]: Without dead ends: 701 [2022-12-14 07:39:12,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:39:12,436 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 976 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:12,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 171 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:39:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-12-14 07:39:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 298. [2022-12-14 07:39:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 289 states have (on average 1.3183391003460208) internal successors, (381), 297 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 07:39:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 381 transitions. [2022-12-14 07:39:12,441 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 381 transitions. Word has length 32 [2022-12-14 07:39:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:12,441 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 381 transitions. [2022-12-14 07:39:12,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 07:39:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 381 transitions. [2022-12-14 07:39:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:39:12,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:12,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:12,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-12-14 07:39:12,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-14 07:39:12,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-14 07:39:13,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:39:13,044 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash 646893308, now seen corresponding path program 1 times [2022-12-14 07:39:13,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:13,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575994856] [2022-12-14 07:39:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:13,047 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 07:39:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:13,050 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:13,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 07:39:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:13,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:39:13,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:13,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:13,262 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575994856] [2022-12-14 07:39:13,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575994856] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730499670] [2022-12-14 07:39:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:39:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:39:13,263 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:39:13,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 07:39:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:13,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:39:13,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:13,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:13,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730499670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:13,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823742413] [2022-12-14 07:39:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:13,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:13,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:13,473 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:13,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 07:39:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:39:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:13,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:39:13,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823742413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:13,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:39:13,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 07:39:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821315855] [2022-12-14 07:39:13,637 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:39:13,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:39:13,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:39:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:39:13,638 INFO L87 Difference]: Start difference. First operand 298 states and 381 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 07:39:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:13,972 INFO L93 Difference]: Finished difference Result 275 states and 346 transitions. [2022-12-14 07:39:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:39:13,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 35 [2022-12-14 07:39:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:13,973 INFO L225 Difference]: With dead ends: 275 [2022-12-14 07:39:13,974 INFO L226 Difference]: Without dead ends: 270 [2022-12-14 07:39:13,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:39:13,974 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 33 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:13,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 128 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:39:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-14 07:39:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2022-12-14 07:39:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 253 states have (on average 1.308300395256917) internal successors, (331), 261 states have internal predecessors, (331), 0 states have call successors, (0), 0 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 07:39:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 331 transitions. [2022-12-14 07:39:13,978 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 331 transitions. Word has length 35 [2022-12-14 07:39:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:13,978 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 331 transitions. [2022-12-14 07:39:13,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 07:39:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 331 transitions. [2022-12-14 07:39:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:39:13,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:13,979 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:13,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 07:39:14,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-14 07:39:14,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-12-14 07:39:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.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 07:39:14,581 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 717604305, now seen corresponding path program 3 times [2022-12-14 07:39:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155088965] [2022-12-14 07:39:14,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:39:14,583 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 07:39:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:14,585 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:14,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 07:39:14,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:39:14,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:39:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:39:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:39:14,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 07:39:14,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:39:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:39:15,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:39:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:39:16,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155088965] [2022-12-14 07:39:16,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155088965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735994633] [2022-12-14 07:39:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:39:16,932 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:39:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:39:16,933 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:39:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 07:39:17,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:39:17,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404815158] [2022-12-14 07:39:17,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:39:17,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:17,180 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:17,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 1 [2022-12-14 07:39:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 07:39:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:39:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:39:17,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:39:18,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:18,304 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:39:18,304 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 1 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 07:39:18,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:39:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:39:18,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:21,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:39:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:39:22,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404815158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:22,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 07:39:22,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13, 14] total 39 [2022-12-14 07:39:22,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206450565] [2022-12-14 07:39:22,323 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 07:39:22,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 07:39:22,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 07:39:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 07:39:22,325 INFO L87 Difference]: Start difference. First operand 262 states and 331 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 07:39:34,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:39:37,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:39:41,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:39:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:54,120 INFO L93 Difference]: Finished difference Result 1635 states and 2167 transitions. [2022-12-14 07:39:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 07:39:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 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 36 [2022-12-14 07:39:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:54,124 INFO L225 Difference]: With dead ends: 1635 [2022-12-14 07:39:54,124 INFO L226 Difference]: Without dead ends: 1619 [2022-12-14 07:39:54,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1331, Invalid=4831, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 07:39:54,125 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 2513 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:54,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2513 Valid, 1063 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 22.6s Time] [2022-12-14 07:39:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-12-14 07:39:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 997. [2022-12-14 07:39:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 988 states have (on average 1.395748987854251) internal successors, (1379), 996 states have internal predecessors, (1379), 0 states have call successors, (0), 0 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 07:39:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1379 transitions. [2022-12-14 07:39:54,138 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1379 transitions. Word has length 36 [2022-12-14 07:39:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:54,138 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1379 transitions. [2022-12-14 07:39:54,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 07:39:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1379 transitions. [2022-12-14 07:39:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 07:39:54,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:54,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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 07:39:54,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-12-14 07:39:54,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-14 07:39:54,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:54,541 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:39:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:39:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1859617932, now seen corresponding path program 1 times [2022-12-14 07:39:54,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:39:54,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222061323] [2022-12-14 07:39:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:54,544 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 07:39:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:39:54,545 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:39:54,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 07:39:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:54,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:39:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:54,745 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 07:39:54,745 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 07:39:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:55,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:55,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:39:55,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222061323] [2022-12-14 07:39:55,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222061323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:55,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806837467] [2022-12-14 07:39:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:55,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:39:55,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:39:55,760 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:39:55,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 07:39:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:39:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:56,261 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 07:39:56,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 07:39:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:56,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:57,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806837467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:57,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864037042] [2022-12-14 07:39:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:39:57,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:39:57,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:39:57,200 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:39:57,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 07:39:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:39:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:39:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:39:57,367 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 07:39:57,367 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 07:39:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:39:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:39:57,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864037042] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:39:57,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:39:57,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 9, 8, 6, 5] total 22 [2022-12-14 07:39:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429763261] [2022-12-14 07:39:57,921 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:39:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:39:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:39:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:39:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:39:57,922 INFO L87 Difference]: Start difference. First operand 997 states and 1379 transitions. Second operand has 23 states, 22 states have (on average 5.045454545454546) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 07:39:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:39:59,482 INFO L93 Difference]: Finished difference Result 1051 states and 1437 transitions. [2022-12-14 07:39:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 07:39:59,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.045454545454546) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 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 38 [2022-12-14 07:39:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:39:59,485 INFO L225 Difference]: With dead ends: 1051 [2022-12-14 07:39:59,485 INFO L226 Difference]: Without dead ends: 1011 [2022-12-14 07:39:59,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 07:39:59,486 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 432 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:39:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 202 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 07:39:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-12-14 07:39:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 972. [2022-12-14 07:39:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 963 states have (on average 1.4018691588785046) internal successors, (1350), 971 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 07:39:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1350 transitions. [2022-12-14 07:39:59,495 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1350 transitions. Word has length 38 [2022-12-14 07:39:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:39:59,495 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1350 transitions. [2022-12-14 07:39:59,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.045454545454546) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 07:39:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1350 transitions. [2022-12-14 07:39:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 07:39:59,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:39:59,496 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:39:59,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 07:39:59,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 07:39:59,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-12-14 07:40:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:40:00,098 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:40:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:00,099 INFO L85 PathProgramCache]: Analyzing trace with hash -282034220, now seen corresponding path program 4 times [2022-12-14 07:40:00,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:40:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054063834] [2022-12-14 07:40:00,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:40:00,100 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 07:40:00,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:40:00,103 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:40:00,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 07:40:00,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:40:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:40:00,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:40:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:00,281 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 07:40:00,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 07:40:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:00,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:01,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:40:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054063834] [2022-12-14 07:40:01,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054063834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871166234] [2022-12-14 07:40:01,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:40:01,723 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:40:01,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:40:01,724 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:40:01,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 07:40:01,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:40:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:40:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:40:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:02,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871166234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446608616] [2022-12-14 07:40:02,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:40:02,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:40:02,897 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:40:02,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 07:40:03,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:40:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:40:03,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:40:03,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:03,035 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 07:40:03,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 07:40:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:03,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:04,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446608616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:04,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:40:04,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 16, 15] total 41 [2022-12-14 07:40:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643521983] [2022-12-14 07:40:04,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:40:04,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 07:40:04,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:40:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 07:40:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 07:40:04,968 INFO L87 Difference]: Start difference. First operand 972 states and 1350 transitions. Second operand has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 07:40:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:09,017 INFO L93 Difference]: Finished difference Result 1450 states and 1984 transitions. [2022-12-14 07:40:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:40:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 0 states have call successors, (0), 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 40 [2022-12-14 07:40:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:09,019 INFO L225 Difference]: With dead ends: 1450 [2022-12-14 07:40:09,019 INFO L226 Difference]: Without dead ends: 1445 [2022-12-14 07:40:09,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=672, Invalid=2634, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 07:40:09,020 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1185 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:09,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1120 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 07:40:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-12-14 07:40:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1279. [2022-12-14 07:40:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1270 states have (on average 1.3937007874015748) internal successors, (1770), 1278 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 07:40:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1770 transitions. [2022-12-14 07:40:09,039 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1770 transitions. Word has length 40 [2022-12-14 07:40:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:09,042 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1770 transitions. [2022-12-14 07:40:09,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 07:40:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1770 transitions. [2022-12-14 07:40:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 07:40:09,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:09,043 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:09,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 07:40:09,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-12-14 07:40:09,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 07:40:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:40:09,646 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:40:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -818443660, now seen corresponding path program 2 times [2022-12-14 07:40:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:40:09,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60079396] [2022-12-14 07:40:09,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:40:09,648 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 07:40:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:40:09,651 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:40:09,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 07:40:09,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:40:09,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:40:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:40:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:09,822 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:40:09,822 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 1 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 07:40:09,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:40:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:40:10,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:40:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:40:13,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:40:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60079396] [2022-12-14 07:40:13,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60079396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326095974] [2022-12-14 07:40:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:40:13,621 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:40:13,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:40:13,622 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:40:13,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 07:40:13,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:40:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:40:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:40:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:13,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:40:13,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 07:40:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:40:14,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:40:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:40:15,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326095974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:15,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203201951] [2022-12-14 07:40:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:40:15,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:40:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:40:15,550 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:40:15,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 07:40:15,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:40:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:40:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:40:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:15,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:40:15,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 07:40:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:40:16,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:17,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:40:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:40:17,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203201951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:17,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:40:17,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4, 3, 4, 3] total 6 [2022-12-14 07:40:17,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933560273] [2022-12-14 07:40:17,440 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:40:17,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:40:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:40:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:40:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:40:17,441 INFO L87 Difference]: Start difference. First operand 1279 states and 1770 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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 07:40:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:18,079 INFO L93 Difference]: Finished difference Result 1450 states and 1987 transitions. [2022-12-14 07:40:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:40:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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 45 [2022-12-14 07:40:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:18,083 INFO L225 Difference]: With dead ends: 1450 [2022-12-14 07:40:18,083 INFO L226 Difference]: Without dead ends: 1450 [2022-12-14 07:40:18,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:40:18,083 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 101 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:18,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 64 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:40:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-12-14 07:40:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1110. [2022-12-14 07:40:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1103 states have (on average 1.388032638259293) internal successors, (1531), 1109 states have internal predecessors, (1531), 0 states have call successors, (0), 0 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 07:40:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1531 transitions. [2022-12-14 07:40:18,097 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1531 transitions. Word has length 45 [2022-12-14 07:40:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:18,097 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1531 transitions. [2022-12-14 07:40:18,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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 07:40:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1531 transitions. [2022-12-14 07:40:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 07:40:18,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:18,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:18,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 07:40:18,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 07:40:18,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-12-14 07:40:18,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:40:18,699 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:40:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -484234273, now seen corresponding path program 1 times [2022-12-14 07:40:18,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:40:18,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159636632] [2022-12-14 07:40:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:18,700 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 07:40:18,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:40:18,701 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:40:18,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 07:40:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 07:40:18,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:18,953 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 07:40:18,963 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 07:40:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:40:19,410 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-12-14 07:40:19,410 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 2 case distinctions, treesize of input 26 treesize of output 32 [2022-12-14 07:40:19,435 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:40:19,435 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 07:40:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:40:20,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:40:23,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:40:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:40:23,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:40:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159636632] [2022-12-14 07:40:23,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159636632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:40:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493792626] [2022-12-14 07:40:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:23,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:40:23,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:40:23,450 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:40:23,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 07:40:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 07:40:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:40:24,067 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 07:40:24,082 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 07:40:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:40:24,552 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-12-14 07:40:24,553 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 07:40:24,572 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:40:24,572 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 07:40:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:40:25,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:41:01,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:41:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:41:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1493792626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:41:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284880933] [2022-12-14 07:41:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:41:01,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:01,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:01,221 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:01,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 07:41:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:41:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 07:41:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:01,373 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 07:41:01,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 07:41:01,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:41:01,779 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-12-14 07:41:01,780 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 07:41:01,799 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:41:01,799 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 07:41:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:41:03,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:41:13,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:41:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:41:13,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284880933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:41:13,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:41:13,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 13, 13] total 45 [2022-12-14 07:41:13,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085913941] [2022-12-14 07:41:13,619 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:41:13,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 07:41:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:41:13,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 07:41:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1747, Unknown=17, NotChecked=0, Total=2070 [2022-12-14 07:41:13,621 INFO L87 Difference]: Start difference. First operand 1110 states and 1531 transitions. Second operand has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 07:41:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:41:24,190 INFO L93 Difference]: Finished difference Result 1771 states and 2413 transitions. [2022-12-14 07:41:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 07:41:24,191 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 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 45 [2022-12-14 07:41:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:41:24,194 INFO L225 Difference]: With dead ends: 1771 [2022-12-14 07:41:24,194 INFO L226 Difference]: Without dead ends: 1771 [2022-12-14 07:41:24,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 217 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=1299, Invalid=4234, Unknown=17, NotChecked=0, Total=5550 [2022-12-14 07:41:24,195 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2084 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:41:24,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2084 Valid, 454 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 07:41:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-12-14 07:41:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1350. [2022-12-14 07:41:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1343 states have (on average 1.3916604616530157) internal successors, (1869), 1349 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 07:41:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1869 transitions. [2022-12-14 07:41:24,207 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1869 transitions. Word has length 45 [2022-12-14 07:41:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:41:24,207 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 1869 transitions. [2022-12-14 07:41:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 07:41:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1869 transitions. [2022-12-14 07:41:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:41:24,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:41:24,208 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 07:41:24,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-12-14 07:41:24,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-12-14 07:41:24,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-12-14 07:41:24,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:24,811 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:41:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:41:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2022-12-14 07:41:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:41:24,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811295512] [2022-12-14 07:41:24,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:41:24,813 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 07:41:24,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:41:24,816 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:41:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-12-14 07:41:25,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 07:41:25,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:41:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:41:25,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:25,099 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 07:41:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:41:26,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:41:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:41:30,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:41:30,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811295512] [2022-12-14 07:41:30,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811295512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:41:30,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050973565] [2022-12-14 07:41:30,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:41:30,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:41:30,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:41:30,298 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:41:30,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-12-14 07:41:31,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 07:41:31,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:41:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 07:41:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:31,580 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 07:41:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:41:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:41:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:41:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050973565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:41:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810620694] [2022-12-14 07:41:45,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:41:45,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:41:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:41:45,307 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:41:45,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-14 07:41:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 07:41:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:41:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:41:47,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:41:47,042 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 07:41:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:41:48,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:41:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:41:56,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810620694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:41:56,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:41:56,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18, 21, 19, 19] total 68 [2022-12-14 07:41:56,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355050551] [2022-12-14 07:41:56,542 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:41:56,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 07:41:56,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:41:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 07:41:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1266, Invalid=3426, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 07:41:56,544 INFO L87 Difference]: Start difference. First operand 1350 states and 1869 transitions. Second operand has 69 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 69 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 07:42:08,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:42:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:42:41,327 INFO L93 Difference]: Finished difference Result 3889 states and 5337 transitions. [2022-12-14 07:42:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 07:42:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 69 states have internal predecessors, (202), 0 states have call successors, (0), 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 46 [2022-12-14 07:42:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:42:41,334 INFO L225 Difference]: With dead ends: 3889 [2022-12-14 07:42:41,334 INFO L226 Difference]: Without dead ends: 3889 [2022-12-14 07:42:41,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=2618, Invalid=6502, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 07:42:41,336 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 2645 mSDsluCounter, 5046 mSDsCounter, 0 mSdLazyCounter, 4962 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 5245 SdHoareTripleChecker+Invalid, 5046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:42:41,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 5245 Invalid, 5046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4962 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2022-12-14 07:42:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2022-12-14 07:42:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 1398. [2022-12-14 07:42:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1391 states have (on average 1.3867721063982745) internal successors, (1929), 1397 states have internal predecessors, (1929), 0 states have call successors, (0), 0 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 07:42:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 1929 transitions. [2022-12-14 07:42:41,358 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 1929 transitions. Word has length 46 [2022-12-14 07:42:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:42:41,358 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 1929 transitions. [2022-12-14 07:42:41,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 69 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 07:42:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 1929 transitions. [2022-12-14 07:42:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:42:41,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:42:41,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:42:41,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-12-14 07:42:41,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-12-14 07:42:41,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-14 07:42:41,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:42:41,961 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:42:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:42:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2126360568, now seen corresponding path program 1 times [2022-12-14 07:42:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:42:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324507059] [2022-12-14 07:42:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:42:41,964 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 07:42:41,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:42:41,965 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:42:41,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-12-14 07:42:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:42:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:42:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:42:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:42:42,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:42:42,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:42:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:42:43,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:42:43,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324507059] [2022-12-14 07:42:43,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324507059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:42:43,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727887162] [2022-12-14 07:42:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:42:43,129 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:42:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:42:43,130 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:42:43,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-12-14 07:42:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:42:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:42:43,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:42:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:42:43,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:42:43,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:42:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:42:44,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727887162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:42:44,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643924852] [2022-12-14 07:42:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:42:44,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:42:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:42:44,105 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:42:44,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-14 07:42:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:42:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:42:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:42:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:42:44,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:42:44,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 07:42:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:42:44,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643924852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:42:44,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:42:44,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2022-12-14 07:42:44,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359700288] [2022-12-14 07:42:44,868 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:42:44,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:42:44,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:42:44,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:42:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:42:44,869 INFO L87 Difference]: Start difference. First operand 1398 states and 1929 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 07:42:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:42:45,971 INFO L93 Difference]: Finished difference Result 1695 states and 2228 transitions. [2022-12-14 07:42:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:42:45,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 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 46 [2022-12-14 07:42:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:42:45,975 INFO L225 Difference]: With dead ends: 1695 [2022-12-14 07:42:45,975 INFO L226 Difference]: Without dead ends: 1695 [2022-12-14 07:42:45,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:42:45,975 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 379 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:42:45,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 155 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:42:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-12-14 07:42:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1414. [2022-12-14 07:42:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1407 states have (on average 1.3383084577114428) internal successors, (1883), 1413 states have internal predecessors, (1883), 0 states have call successors, (0), 0 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 07:42:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1883 transitions. [2022-12-14 07:42:45,988 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1883 transitions. Word has length 46 [2022-12-14 07:42:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:42:45,990 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 1883 transitions. [2022-12-14 07:42:45,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 07:42:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1883 transitions. [2022-12-14 07:42:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 07:42:45,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:42:45,991 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:42:45,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-12-14 07:42:46,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-12-14 07:42:46,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-14 07:42:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:42:46,593 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-14 07:42:46,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:42:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash 274247196, now seen corresponding path program 5 times [2022-12-14 07:42:46,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:42:46,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589585934] [2022-12-14 07:42:46,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:42:46,595 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 07:42:46,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:42:46,596 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -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 07:42:46,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-12-14 07:42:47,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 07:42:47,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:42:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 07:42:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:42:47,040 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:42:47,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 07:42:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:42:48,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:42:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:42:50,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:42:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589585934] [2022-12-14 07:42:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589585934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:42:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594134564] [2022-12-14 07:42:50,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:42:50,400 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:42:50,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:42:50,401 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:42:50,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_283bc9c5-bc82-498b-a656-867b04b07603/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process