./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW --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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- 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-4e7fbc6 [2022-11-23 14:05:35,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:05:35,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:05:35,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:05:35,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:05:35,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:05:35,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:05:35,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:05:35,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:05:35,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:05:35,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:05:35,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:05:35,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:05:35,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:05:35,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:05:35,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:05:35,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:05:35,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:05:35,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:05:35,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:05:35,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:05:35,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:05:35,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:05:35,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:05:35,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:05:35,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:05:35,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:05:35,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:05:35,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:05:35,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:05:35,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:05:35,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:05:35,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:05:35,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:05:35,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:05:35,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:05:35,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:05:35,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:05:35,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:05:35,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:05:35,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:05:35,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:05:35,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:05:35,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:05:35,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:05:35,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:05:35,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:05:35,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:05:35,367 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:05:35,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:05:35,367 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:05:35,367 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:05:35,368 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:05:35,368 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:05:35,368 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:05:35,368 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:05:35,369 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:05:35,369 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:05:35,369 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:05:35,370 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:05:35,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:05:35,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:05:35,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:05:35,371 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:05:35,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:05:35,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:05:35,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:05:35,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:05:35,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:05:35,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:05:35,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:05:35,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:05:35,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:05:35,374 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:05:35,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:05:35,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:05:35,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:05:35,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:35,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:05:35,376 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:05:35,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:05:35,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:05:35,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:05:35,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:05:35,377 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_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-11-23 14:05:35,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:05:35,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:05:35,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:05:35,684 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:05:35,684 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:05:35,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-23 14:05:38,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:05:38,773 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:05:38,773 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-23 14:05:38,781 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data/10cc63271/9d2736b04ee142c08d29ac7df6815794/FLAG2fd9d9185 [2022-11-23 14:05:38,802 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data/10cc63271/9d2736b04ee142c08d29ac7df6815794 [2022-11-23 14:05:38,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:05:38,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:05:38,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:38,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:05:38,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:05:38,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:38" (1/1) ... [2022-11-23 14:05:38,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bfbbb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:38, skipping insertion in model container [2022-11-23 14:05:38,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:38" (1/1) ... [2022-11-23 14:05:38,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:05:38,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:39,046 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-23 14:05:39,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:39,112 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 14:05:39,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b052add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:39, skipping insertion in model container [2022-11-23 14:05:39,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:39,113 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 14:05:39,115 INFO L158 Benchmark]: Toolchain (without parser) took 300.20ms. Allocated memory is still 174.1MB. Free memory was 142.3MB in the beginning and 145.5MB in the end (delta: -3.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:05:39,115 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:05:39,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.58ms. Allocated memory is still 174.1MB. Free memory was 141.5MB in the beginning and 145.5MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 14:05:39,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.58ms. Allocated memory is still 174.1MB. Free memory was 141.5MB in the beginning and 145.5MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW --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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- 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-4e7fbc6 [2022-11-23 14:05:41,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:05:41,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:05:41,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:05:41,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:05:41,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:05:41,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:05:41,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:05:41,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:05:41,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:05:41,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:05:41,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:05:41,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:05:41,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:05:41,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:05:41,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:05:41,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:05:41,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:05:41,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:05:41,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:05:41,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:05:41,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:05:41,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:05:41,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:05:41,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:05:41,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:05:41,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:05:41,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:05:41,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:05:41,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:05:41,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:05:41,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:05:41,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:05:41,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:05:41,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:05:41,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:05:41,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:05:41,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:05:41,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:05:41,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:05:41,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:05:41,608 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 14:05:41,644 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:05:41,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:05:41,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:05:41,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:05:41,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:05:41,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:05:41,647 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:05:41,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:05:41,647 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:05:41,647 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:05:41,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:05:41,648 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:05:41,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:05:41,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:05:41,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:05:41,649 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:05:41,649 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:05:41,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:05:41,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:05:41,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:05:41,650 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:05:41,651 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:05:41,651 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:05:41,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:05:41,651 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:05:41,651 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:05:41,652 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:05:41,652 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:05:41,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:05:41,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:05:41,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:05:41,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:05:41,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:41,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:05:41,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:05:41,654 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:05:41,654 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:41,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:05:41,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:05:41,655 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_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-11-23 14:05:42,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:05:42,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:05:42,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:05:42,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:05:42,102 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:05:42,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-23 14:05:45,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:05:45,463 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:05:45,464 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-23 14:05:45,473 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data/ce0a19dcb/0da2928ca40b45adadbd939c9890ae42/FLAG7410bf0e6 [2022-11-23 14:05:45,503 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/data/ce0a19dcb/0da2928ca40b45adadbd939c9890ae42 [2022-11-23 14:05:45,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:05:45,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:05:45,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:45,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:05:45,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:05:45,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a079335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45, skipping insertion in model container [2022-11-23 14:05:45,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:05:45,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:45,785 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-23 14:05:45,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:45,830 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 14:05:45,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:45,858 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-23 14:05:45,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:45,872 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:05:45,897 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-23 14:05:45,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:45,918 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:05:45,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45 WrapperNode [2022-11-23 14:05:45,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:45,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:05:45,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:05:45,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:05:45,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,966 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-11-23 14:05:45,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:05:45,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:05:45,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:05:45,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:05:45,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:45,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:46,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:46,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:46,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:46,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:46,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:05:46,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:05:46,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:05:46,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:05:46,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (1/1) ... [2022-11-23 14:05:46,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:46,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:05:46,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:05:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:05:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 14:05:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:05:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 14:05:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 14:05:46,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 14:05:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 14:05:46,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 14:05:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 14:05:46,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 14:05:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 14:05:46,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 14:05:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 14:05:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 14:05:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:05:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:05:46,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:05:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:05:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 14:05:46,180 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:05:46,291 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:05:46,293 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:05:47,198 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:05:47,415 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:05:47,415 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 14:05:47,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:47 BoogieIcfgContainer [2022-11-23 14:05:47,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:05:47,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:05:47,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:05:47,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:05:47,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:05:45" (1/3) ... [2022-11-23 14:05:47,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f942156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:47, skipping insertion in model container [2022-11-23 14:05:47,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:45" (2/3) ... [2022-11-23 14:05:47,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f942156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:47, skipping insertion in model container [2022-11-23 14:05:47,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:47" (3/3) ... [2022-11-23 14:05:47,429 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-11-23 14:05:47,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:05:47,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-23 14:05:47,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:05:47,598 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 14:05:47,647 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:05:47,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-23 14:05:47,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-23 14:05:47,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-11-23 14:05:47,805 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-11-23 14:05:47,805 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 14:05:47,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 278 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-23 14:05:47,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-11-23 14:06:24,589 WARN L233 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 134 DAG size of output: 133 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 14:06:27,626 INFO L134 LiptonReduction]: Checked pairs total: 8738 [2022-11-23 14:06:27,627 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-11-23 14:06:27,640 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 178 flow [2022-11-23 14:06:28,324 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:28,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:06:28,353 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;@6dd804c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:06:28,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-23 14:06:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:28,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:06:28,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:28,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:06:28,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash 27476, now seen corresponding path program 1 times [2022-11-23 14:06:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:28,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177993266] [2022-11-23 14:06:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:28,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:28,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:28,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 14:06:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:06:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:28,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:28,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177993266] [2022-11-23 14:06:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177993266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:28,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:28,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:06:28,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854623541] [2022-11-23 14:06:28,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:28,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:28,866 INFO L87 Difference]: Start difference. First operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:29,494 INFO L93 Difference]: Finished difference Result 4508 states and 18077 transitions. [2022-11-23 14:06:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:06:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:29,656 INFO L225 Difference]: With dead ends: 4508 [2022-11-23 14:06:29,657 INFO L226 Difference]: Without dead ends: 4508 [2022-11-23 14:06:29,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:29,661 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:29,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:06:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-11-23 14:06:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4506. [2022-11-23 14:06:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4029 states have (on average 4.486721270786796) internal successors, (18077), 4505 states have internal predecessors, (18077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18077 transitions. [2022-11-23 14:06:30,287 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18077 transitions. Word has length 2 [2022-11-23 14:06:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:30,303 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18077 transitions. [2022-11-23 14:06:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18077 transitions. [2022-11-23 14:06:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:06:30,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:30,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:06:30,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-23 14:06:30,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:30,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash 27384, now seen corresponding path program 1 times [2022-11-23 14:06:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:30,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194639647] [2022-11-23 14:06:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:30,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:30,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:30,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:30,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 14:06:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:30,963 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-23 14:06:30,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-23 14:06:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:31,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:31,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:31,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194639647] [2022-11-23 14:06:31,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194639647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:31,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:31,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:06:31,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596723331] [2022-11-23 14:06:31,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:31,049 INFO L87 Difference]: Start difference. First operand 4506 states and 18077 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:31,376 INFO L93 Difference]: Finished difference Result 4505 states and 18075 transitions. [2022-11-23 14:06:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:06:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:31,425 INFO L225 Difference]: With dead ends: 4505 [2022-11-23 14:06:31,425 INFO L226 Difference]: Without dead ends: 4505 [2022-11-23 14:06:31,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:31,457 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:31,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:06:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-23 14:06:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-23 14:06:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.486224869694714) internal successors, (18075), 4504 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18075 transitions. [2022-11-23 14:06:31,701 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18075 transitions. Word has length 2 [2022-11-23 14:06:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:31,702 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18075 transitions. [2022-11-23 14:06:31,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18075 transitions. [2022-11-23 14:06:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:06:31,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:31,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:06:31,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:31,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:31,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 27385, now seen corresponding path program 1 times [2022-11-23 14:06:31,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:31,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472171819] [2022-11-23 14:06:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:31,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:31,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:31,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 14:06:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:06:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:32,253 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:32,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:32,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:32,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472171819] [2022-11-23 14:06:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472171819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:32,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:32,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:06:32,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957405877] [2022-11-23 14:06:32,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:32,306 INFO L87 Difference]: Start difference. First operand 4505 states and 18075 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:32,747 INFO L93 Difference]: Finished difference Result 4505 states and 18074 transitions. [2022-11-23 14:06:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:06:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:32,812 INFO L225 Difference]: With dead ends: 4505 [2022-11-23 14:06:32,812 INFO L226 Difference]: Without dead ends: 4505 [2022-11-23 14:06:32,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:32,817 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:32,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:06:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-23 14:06:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-23 14:06:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.485976669148672) internal successors, (18074), 4504 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18074 transitions. [2022-11-23 14:06:33,076 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18074 transitions. Word has length 2 [2022-11-23 14:06:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:33,078 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18074 transitions. [2022-11-23 14:06:33,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18074 transitions. [2022-11-23 14:06:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:06:33,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:33,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:06:33,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:33,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:33,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 851797, now seen corresponding path program 1 times [2022-11-23 14:06:33,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:33,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570089909] [2022-11-23 14:06:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:33,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:33,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:33,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 14:06:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:06:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:33,605 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2022-11-23 14:06:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2022-11-23 14:06:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:06:33,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:33,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:33,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570089909] [2022-11-23 14:06:33,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570089909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:33,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:33,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:06:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159936007] [2022-11-23 14:06:33,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:33,818 INFO L87 Difference]: Start difference. First operand 4505 states and 18074 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:34,236 INFO L93 Difference]: Finished difference Result 3864 states and 15193 transitions. [2022-11-23 14:06:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:06:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:34,265 INFO L225 Difference]: With dead ends: 3864 [2022-11-23 14:06:34,266 INFO L226 Difference]: Without dead ends: 3864 [2022-11-23 14:06:34,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:34,267 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:34,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:06:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-11-23 14:06:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3864. [2022-11-23 14:06:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3464 states have (on average 4.3859699769053115) internal successors, (15193), 3863 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 15193 transitions. [2022-11-23 14:06:34,414 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 15193 transitions. Word has length 3 [2022-11-23 14:06:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:34,415 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 15193 transitions. [2022-11-23 14:06:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 15193 transitions. [2022-11-23 14:06:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:06:34,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:34,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:06:34,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-23 14:06:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:34,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 851798, now seen corresponding path program 1 times [2022-11-23 14:06:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:34,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538878706] [2022-11-23 14:06:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:34,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:34,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:34,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 14:06:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:06:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:35,019 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-23 14:06:35,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-11-23 14:06:35,067 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-23 14:06:35,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-23 14:06:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:35,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:35,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:35,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538878706] [2022-11-23 14:06:35,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538878706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:35,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695538464] [2022-11-23 14:06:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:06:35,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:06:35,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-23 14:06:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:06:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:36,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:36,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:36,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:36,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:36,265 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-23 14:06:36,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-23 14:06:36,353 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-23 14:06:36,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 96 [2022-11-23 14:06:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:06:36,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:36,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695538464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:36,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:06:36,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-23 14:06:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486885356] [2022-11-23 14:06:36,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:36,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:06:36,478 INFO L87 Difference]: Start difference. First operand 3864 states and 15193 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:36,813 INFO L93 Difference]: Finished difference Result 3223 states and 12312 transitions. [2022-11-23 14:06:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:06:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:36,836 INFO L225 Difference]: With dead ends: 3223 [2022-11-23 14:06:36,836 INFO L226 Difference]: Without dead ends: 3223 [2022-11-23 14:06:36,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:06:36,837 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:36,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:06:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-11-23 14:06:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3223. [2022-11-23 14:06:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2899 states have (on average 4.2469817178337355) internal successors, (12312), 3222 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 12312 transitions. [2022-11-23 14:06:37,022 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 12312 transitions. Word has length 3 [2022-11-23 14:06:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:37,023 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 12312 transitions. [2022-11-23 14:06:37,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 12312 transitions. [2022-11-23 14:06:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:06:37,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:37,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:06:37,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-23 14:06:37,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:37,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:37,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 851706, now seen corresponding path program 1 times [2022-11-23 14:06:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:37,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229085879] [2022-11-23 14:06:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:37,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:37,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:06:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:37,786 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:37,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:37,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:38,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229085879] [2022-11-23 14:06:38,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229085879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1875821122] [2022-11-23 14:06:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:38,209 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:38,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:06:38,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:06:38,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 14:06:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:06:38,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:38,603 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:38,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:38,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:38,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1875821122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737612011] [2022-11-23 14:06:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:38,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:38,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:38,727 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:38,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:06:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:38,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:06:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:39,108 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:39,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:39,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:39,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737612011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:39,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:06:39,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-23 14:06:39,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562255487] [2022-11-23 14:06:39,337 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:06:39,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:06:39,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:39,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:06:39,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:06:39,338 INFO L87 Difference]: Start difference. First operand 3223 states and 12312 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:41,826 INFO L93 Difference]: Finished difference Result 9664 states and 36932 transitions. [2022-11-23 14:06:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:06:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:06:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:41,894 INFO L225 Difference]: With dead ends: 9664 [2022-11-23 14:06:41,894 INFO L226 Difference]: Without dead ends: 9664 [2022-11-23 14:06:41,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:06:41,895 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 305 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:41,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 15 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 14:06:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2022-11-23 14:06:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 3226. [2022-11-23 14:06:42,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2902 states have (on average 4.244658855961406) internal successors, (12318), 3225 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 12318 transitions. [2022-11-23 14:06:42,103 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 12318 transitions. Word has length 3 [2022-11-23 14:06:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:42,103 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 12318 transitions. [2022-11-23 14:06:42,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 12318 transitions. [2022-11-23 14:06:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:06:42,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:42,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:06:42,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:42,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:42,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:42,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:42,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 818598779, now seen corresponding path program 1 times [2022-11-23 14:06:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:42,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73819703] [2022-11-23 14:06:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:42,720 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 [2022-11-23 14:06:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:42,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:42,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 14:06:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:42,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:06:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:43,019 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-23 14:06:43,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-23 14:06:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:06:43,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:43,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73819703] [2022-11-23 14:06:43,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73819703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:43,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:43,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954536346] [2022-11-23 14:06:43,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:43,056 INFO L87 Difference]: Start difference. First operand 3226 states and 12318 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:43,296 INFO L93 Difference]: Finished difference Result 1562 states and 5866 transitions. [2022-11-23 14:06:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:06:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:43,305 INFO L225 Difference]: With dead ends: 1562 [2022-11-23 14:06:43,305 INFO L226 Difference]: Without dead ends: 1562 [2022-11-23 14:06:43,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:43,306 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:43,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:06:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-11-23 14:06:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2022-11-23 14:06:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1465 states have (on average 4.0040955631399315) internal successors, (5866), 1561 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5866 transitions. [2022-11-23 14:06:43,355 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5866 transitions. Word has length 5 [2022-11-23 14:06:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:43,355 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 5866 transitions. [2022-11-23 14:06:43,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5866 transitions. [2022-11-23 14:06:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:06:43,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:43,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:06:43,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:43,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:43,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 818598780, now seen corresponding path program 1 times [2022-11-23 14:06:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174680006] [2022-11-23 14:06:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:43,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:43,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:43,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:06:43,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:43,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:43,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-23 14:06:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:43,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:43,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174680006] [2022-11-23 14:06:43,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174680006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:43,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898657421] [2022-11-23 14:06:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:43,989 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:43,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:06:43,990 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:06:43,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-23 14:06:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:06:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:44,447 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:44,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:44,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:45,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1898657421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498293665] [2022-11-23 14:06:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:45,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:45,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:45,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:06:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:06:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:45,429 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:45,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:45,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:45,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498293665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:45,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:06:45,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-23 14:06:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015303136] [2022-11-23 14:06:45,717 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:06:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:06:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:06:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:06:45,719 INFO L87 Difference]: Start difference. First operand 1562 states and 5866 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:47,203 INFO L93 Difference]: Finished difference Result 3376 states and 12596 transitions. [2022-11-23 14:06:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:06:47,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:06:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:47,227 INFO L225 Difference]: With dead ends: 3376 [2022-11-23 14:06:47,228 INFO L226 Difference]: Without dead ends: 3376 [2022-11-23 14:06:47,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:06:47,229 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 703 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:47,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 5 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:06:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2022-11-23 14:06:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 1130. [2022-11-23 14:06:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1079 states have (on average 3.8980537534754403) internal successors, (4206), 1129 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 4206 transitions. [2022-11-23 14:06:47,317 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 4206 transitions. Word has length 5 [2022-11-23 14:06:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:47,317 INFO L495 AbstractCegarLoop]: Abstraction has 1130 states and 4206 transitions. [2022-11-23 14:06:47,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 4206 transitions. [2022-11-23 14:06:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:06:47,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:47,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:06:47,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-23 14:06:47,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:47,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:47,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:47,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash 818599008, now seen corresponding path program 1 times [2022-11-23 14:06:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:47,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468534071] [2022-11-23 14:06:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:47,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:47,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:47,925 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:47,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 14:06:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:06:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:48,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:48,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:48,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:48,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:48,315 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-23 14:06:48,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-23 14:06:48,346 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 14:06:48,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-23 14:06:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:48,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:49,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468534071] [2022-11-23 14:06:49,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468534071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653620332] [2022-11-23 14:06:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:06:49,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:06:49,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-23 14:06:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:49,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:06:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:49,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:49,715 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-23 14:06:49,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-23 14:06:49,766 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 14:06:49,766 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 104 treesize of output 98 [2022-11-23 14:06:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:06:49,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:49,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653620332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:49,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:06:49,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-23 14:06:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302135645] [2022-11-23 14:06:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:49,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:06:49,935 INFO L87 Difference]: Start difference. First operand 1130 states and 4206 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:50,149 INFO L93 Difference]: Finished difference Result 1085 states and 4056 transitions. [2022-11-23 14:06:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:06:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:50,157 INFO L225 Difference]: With dead ends: 1085 [2022-11-23 14:06:50,157 INFO L226 Difference]: Without dead ends: 1085 [2022-11-23 14:06:50,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:06:50,159 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:50,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:06:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-11-23 14:06:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1085. [2022-11-23 14:06:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1040 states have (on average 3.9) internal successors, (4056), 1084 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 4056 transitions. [2022-11-23 14:06:50,205 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 4056 transitions. Word has length 5 [2022-11-23 14:06:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:50,206 INFO L495 AbstractCegarLoop]: Abstraction has 1085 states and 4056 transitions. [2022-11-23 14:06:50,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 4056 transitions. [2022-11-23 14:06:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:06:50,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:50,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:06:50,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-23 14:06:50,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:50,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:50,620 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash 818599009, now seen corresponding path program 1 times [2022-11-23 14:06:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:50,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313597571] [2022-11-23 14:06:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:50,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:50,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:50,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:50,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:06:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:50,893 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-23 14:06:50,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-23 14:06:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:06:51,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:51,160 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:51,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313597571] [2022-11-23 14:06:51,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313597571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:51,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:51,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:06:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652076337] [2022-11-23 14:06:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:51,162 INFO L87 Difference]: Start difference. First operand 1085 states and 4056 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:51,477 INFO L93 Difference]: Finished difference Result 1040 states and 3906 transitions. [2022-11-23 14:06:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 14:06:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:51,484 INFO L225 Difference]: With dead ends: 1040 [2022-11-23 14:06:51,485 INFO L226 Difference]: Without dead ends: 1040 [2022-11-23 14:06:51,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:51,486 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:51,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:06:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-11-23 14:06:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1040. [2022-11-23 14:06:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1001 states have (on average 3.902097902097902) internal successors, (3906), 1039 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3906 transitions. [2022-11-23 14:06:51,526 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3906 transitions. Word has length 5 [2022-11-23 14:06:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:51,527 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 3906 transitions. [2022-11-23 14:06:51,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3906 transitions. [2022-11-23 14:06:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:06:51,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:51,528 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-23 14:06:51,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:51,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:51,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:06:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -393878727, now seen corresponding path program 2 times [2022-11-23 14:06:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557238591] [2022-11-23 14:06:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:06:51,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:51,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:51,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:51,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:06:51,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:06:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:06:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:52,175 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:52,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:52,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:53,106 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557238591] [2022-11-23 14:06:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557238591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324895701] [2022-11-23 14:06:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:06:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:06:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:06:53,107 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:06:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 14:06:53,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:06:53,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:06:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:06:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:53,651 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:53,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:53,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324895701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943562638] [2022-11-23 14:06:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:06:55,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:55,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:55,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:55,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:06:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:06:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:06:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:06:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:55,523 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:06:55,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:06:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:55,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:55,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943562638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:55,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:06:55,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-23 14:06:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437089561] [2022-11-23 14:06:55,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:06:55,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:06:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:06:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:06:55,861 INFO L87 Difference]: Start difference. First operand 1040 states and 3906 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2022-11-23 14:07:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:02,322 INFO L93 Difference]: Finished difference Result 9310 states and 35078 transitions. [2022-11-23 14:07:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:07:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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 6 [2022-11-23 14:07:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:02,364 INFO L225 Difference]: With dead ends: 9310 [2022-11-23 14:07:02,364 INFO L226 Difference]: Without dead ends: 9310 [2022-11-23 14:07:02,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:07:02,365 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1640 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:02,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 26 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 14:07:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2022-11-23 14:07:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 1046. [2022-11-23 14:07:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1007 states have (on average 3.890764647467726) internal successors, (3918), 1045 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3918 transitions. [2022-11-23 14:07:02,486 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3918 transitions. Word has length 6 [2022-11-23 14:07:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:02,486 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 3918 transitions. [2022-11-23 14:07:02,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2022-11-23 14:07:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3918 transitions. [2022-11-23 14:07:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:07:02,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:02,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:02,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:02,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:02,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:03,102 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:03,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:03,102 INFO L85 PathProgramCache]: Analyzing trace with hash 694436480, now seen corresponding path program 1 times [2022-11-23 14:07:03,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:03,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674366349] [2022-11-23 14:07:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:03,103 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 [2022-11-23 14:07:03,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:03,104 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:03,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 14:07:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:07:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:03,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:03,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:03,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674366349] [2022-11-23 14:07:03,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674366349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:03,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:03,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:03,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863870561] [2022-11-23 14:07:03,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:03,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:07:03,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:07:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:07:03,299 INFO L87 Difference]: Start difference. First operand 1046 states and 3918 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:03,828 INFO L93 Difference]: Finished difference Result 1556 states and 5796 transitions. [2022-11-23 14:07:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:07:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:03,834 INFO L225 Difference]: With dead ends: 1556 [2022-11-23 14:07:03,834 INFO L226 Difference]: Without dead ends: 1556 [2022-11-23 14:07:03,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:03,835 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 156 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:03,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 5 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:07:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-11-23 14:07:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1228. [2022-11-23 14:07:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1189 states have (on average 4.040370058873003) internal successors, (4804), 1227 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 4804 transitions. [2022-11-23 14:07:03,878 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 4804 transitions. Word has length 7 [2022-11-23 14:07:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:03,878 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 4804 transitions. [2022-11-23 14:07:03,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 4804 transitions. [2022-11-23 14:07:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:07:03,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:03,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:03,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:04,093 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash 694650597, now seen corresponding path program 1 times [2022-11-23 14:07:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:04,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210012590] [2022-11-23 14:07:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:04,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:04,094 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:04,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 14:07:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:07:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:04,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:04,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:04,490 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-23 14:07:04,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-23 14:07:04,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:07:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:04,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:05,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210012590] [2022-11-23 14:07:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210012590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1127350300] [2022-11-23 14:07:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:05,060 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:05,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:05,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:05,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-23 14:07:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:05,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:07:05,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:05,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:05,554 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-23 14:07:05,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 53 [2022-11-23 14:07:05,587 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 60 treesize of output 58 [2022-11-23 14:07:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:05,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:05,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1127350300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:05,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:07:05,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-23 14:07:05,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296256613] [2022-11-23 14:07:05,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:05,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:05,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:05,820 INFO L87 Difference]: Start difference. First operand 1228 states and 4804 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:06,022 INFO L93 Difference]: Finished difference Result 1190 states and 4689 transitions. [2022-11-23 14:07:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:07:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:06,029 INFO L225 Difference]: With dead ends: 1190 [2022-11-23 14:07:06,029 INFO L226 Difference]: Without dead ends: 1190 [2022-11-23 14:07:06,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:06,030 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:06,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-23 14:07:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2022-11-23 14:07:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1157 states have (on average 4.052722558340536) internal successors, (4689), 1189 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 4689 transitions. [2022-11-23 14:07:06,067 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 4689 transitions. Word has length 7 [2022-11-23 14:07:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:06,067 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 4689 transitions. [2022-11-23 14:07:06,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 4689 transitions. [2022-11-23 14:07:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:07:06,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:06,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:06,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:06,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:06,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:06,481 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash 694650598, now seen corresponding path program 1 times [2022-11-23 14:07:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:06,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045656824] [2022-11-23 14:07:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:06,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:06,483 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:06,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 14:07:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:06,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:07:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:06,759 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-11-23 14:07:06,759 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-11-23 14:07:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:06,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:06,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045656824] [2022-11-23 14:07:06,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045656824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:06,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:06,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:07:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37377324] [2022-11-23 14:07:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:06,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:06,802 INFO L87 Difference]: Start difference. First operand 1190 states and 4689 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:06,958 INFO L93 Difference]: Finished difference Result 1152 states and 4574 transitions. [2022-11-23 14:07:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:06,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:07:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:06,962 INFO L225 Difference]: With dead ends: 1152 [2022-11-23 14:07:06,962 INFO L226 Difference]: Without dead ends: 1152 [2022-11-23 14:07:06,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:06,963 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:06,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-23 14:07:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2022-11-23 14:07:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1125 states have (on average 4.065777777777778) internal successors, (4574), 1151 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4574 transitions. [2022-11-23 14:07:06,989 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4574 transitions. Word has length 7 [2022-11-23 14:07:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:06,989 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 4574 transitions. [2022-11-23 14:07:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4574 transitions. [2022-11-23 14:07:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:07:06,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:06,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:07,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:07,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:07,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:07,203 INFO L85 PathProgramCache]: Analyzing trace with hash 52698473, now seen corresponding path program 1 times [2022-11-23 14:07:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:07,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680156290] [2022-11-23 14:07:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:07,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:07,204 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 14:07:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:07,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:07:07,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:07,566 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:07,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:07,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:08,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:08,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680156290] [2022-11-23 14:07:08,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680156290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:08,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181390424] [2022-11-23 14:07:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:08,171 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:08,172 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:08,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-23 14:07:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:08,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:08,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181390424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864394777] [2022-11-23 14:07:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:08,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:08,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:08,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 14:07:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:08,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:09,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:09,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864394777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:09,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:09,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-23 14:07:09,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94095461] [2022-11-23 14:07:09,207 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:09,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:07:09,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:09,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:07:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:07:09,208 INFO L87 Difference]: Start difference. First operand 1152 states and 4574 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:14,328 INFO L93 Difference]: Finished difference Result 2913 states and 11309 transitions. [2022-11-23 14:07:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:07:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:14,339 INFO L225 Difference]: With dead ends: 2913 [2022-11-23 14:07:14,339 INFO L226 Difference]: Without dead ends: 2913 [2022-11-23 14:07:14,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:07:14,340 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 783 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:14,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 37 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-23 14:07:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-11-23 14:07:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2357. [2022-11-23 14:07:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2330 states have (on average 4.136051502145922) internal successors, (9637), 2356 states have internal predecessors, (9637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 9637 transitions. [2022-11-23 14:07:14,460 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 9637 transitions. Word has length 8 [2022-11-23 14:07:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:14,460 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 9637 transitions. [2022-11-23 14:07:14,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 9637 transitions. [2022-11-23 14:07:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:07:14,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:14,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:14,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:14,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-23 14:07:14,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-23 14:07:15,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:15,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1839315000, now seen corresponding path program 1 times [2022-11-23 14:07:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:15,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090301063] [2022-11-23 14:07:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:15,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:15,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:15,081 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-23 14:07:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:07:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:15,551 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:15,552 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:15,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:16,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:16,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090301063] [2022-11-23 14:07:16,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090301063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:16,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511888285] [2022-11-23 14:07:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:16,180 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:16,183 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:16,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-23 14:07:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:07:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:16,689 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-23 14:07:16,689 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 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-23 14:07:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:16,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:16,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [511888285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:16,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:07:16,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-23 14:07:16,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555718301] [2022-11-23 14:07:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:16,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:16,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:16,848 INFO L87 Difference]: Start difference. First operand 2357 states and 9637 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:17,029 INFO L93 Difference]: Finished difference Result 2095 states and 8534 transitions. [2022-11-23 14:07:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:07:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:17,036 INFO L225 Difference]: With dead ends: 2095 [2022-11-23 14:07:17,036 INFO L226 Difference]: Without dead ends: 2095 [2022-11-23 14:07:17,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:17,037 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:17,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2022-11-23 14:07:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2095. [2022-11-23 14:07:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2077 states have (on average 4.1088107847857485) internal successors, (8534), 2094 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 8534 transitions. [2022-11-23 14:07:17,094 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 8534 transitions. Word has length 9 [2022-11-23 14:07:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:17,094 INFO L495 AbstractCegarLoop]: Abstraction has 2095 states and 8534 transitions. [2022-11-23 14:07:17,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 8534 transitions. [2022-11-23 14:07:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:07:17,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:17,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:17,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:17,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:17,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:17,508 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1839315002, now seen corresponding path program 1 times [2022-11-23 14:07:17,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:17,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133752891] [2022-11-23 14:07:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:17,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:17,509 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:17,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-23 14:07:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:07:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:17,788 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-23 14:07:17,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2022-11-23 14:07:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:17,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:17,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133752891] [2022-11-23 14:07:17,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133752891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:17,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:07:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618071103] [2022-11-23 14:07:17,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:17,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:17,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:17,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:17,833 INFO L87 Difference]: Start difference. First operand 2095 states and 8534 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:17,973 INFO L93 Difference]: Finished difference Result 1833 states and 7431 transitions. [2022-11-23 14:07:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:07:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:17,979 INFO L225 Difference]: With dead ends: 1833 [2022-11-23 14:07:17,979 INFO L226 Difference]: Without dead ends: 1833 [2022-11-23 14:07:17,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:17,980 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:17,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-23 14:07:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1833. [2022-11-23 14:07:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1824 states have (on average 4.074013157894737) internal successors, (7431), 1832 states have internal predecessors, (7431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 7431 transitions. [2022-11-23 14:07:18,024 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 7431 transitions. Word has length 9 [2022-11-23 14:07:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:18,025 INFO L495 AbstractCegarLoop]: Abstraction has 1833 states and 7431 transitions. [2022-11-23 14:07:18,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 7431 transitions. [2022-11-23 14:07:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:07:18,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:18,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:18,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:18,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:18,239 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1839121778, now seen corresponding path program 1 times [2022-11-23 14:07:18,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:18,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495667484] [2022-11-23 14:07:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:18,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:18,240 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:18,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-23 14:07:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:07:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:18,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:18,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495667484] [2022-11-23 14:07:18,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495667484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:18,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:18,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490966521] [2022-11-23 14:07:18,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:18,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:07:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:07:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:07:18,453 INFO L87 Difference]: Start difference. First operand 1833 states and 7431 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:18,830 INFO L93 Difference]: Finished difference Result 2599 states and 10543 transitions. [2022-11-23 14:07:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:07:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:07:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:18,837 INFO L225 Difference]: With dead ends: 2599 [2022-11-23 14:07:18,837 INFO L226 Difference]: Without dead ends: 2599 [2022-11-23 14:07:18,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:07:18,837 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 138 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:18,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 5 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:07:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2022-11-23 14:07:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2187. [2022-11-23 14:07:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2178 states have (on average 4.244719926538108) internal successors, (9245), 2186 states have internal predecessors, (9245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9245 transitions. [2022-11-23 14:07:18,899 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9245 transitions. Word has length 9 [2022-11-23 14:07:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:18,899 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 9245 transitions. [2022-11-23 14:07:18,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9245 transitions. [2022-11-23 14:07:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:07:18,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:18,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:18,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:19,111 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:19,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1184184527, now seen corresponding path program 1 times [2022-11-23 14:07:19,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670442882] [2022-11-23 14:07:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:19,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:19,113 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:19,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-23 14:07:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:19,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:19,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-23 14:07:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:19,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:19,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670442882] [2022-11-23 14:07:19,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670442882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:19,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1456067625] [2022-11-23 14:07:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:19,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:19,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:19,711 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:19,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-23 14:07:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:07:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:20,223 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:20,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:20,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:20,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1456067625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31691245] [2022-11-23 14:07:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:20,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:20,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:20,923 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:20,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 14:07:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:07:21,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:21,299 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:21,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:21,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:21,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31691245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:21,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:21,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-23 14:07:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412778605] [2022-11-23 14:07:21,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:21,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:07:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:07:21,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:07:21,705 INFO L87 Difference]: Start difference. First operand 2187 states and 9245 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:23,712 INFO L93 Difference]: Finished difference Result 5846 states and 24654 transitions. [2022-11-23 14:07:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:07:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:07:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:23,732 INFO L225 Difference]: With dead ends: 5846 [2022-11-23 14:07:23,732 INFO L226 Difference]: Without dead ends: 5846 [2022-11-23 14:07:23,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:07:23,733 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 604 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:23,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 7 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:07:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2022-11-23 14:07:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2683. [2022-11-23 14:07:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2674 states have (on average 4.449139865370232) internal successors, (11897), 2682 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 11897 transitions. [2022-11-23 14:07:23,851 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 11897 transitions. Word has length 10 [2022-11-23 14:07:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:23,851 INFO L495 AbstractCegarLoop]: Abstraction has 2683 states and 11897 transitions. [2022-11-23 14:07:23,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 11897 transitions. [2022-11-23 14:07:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:07:23,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:23,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:23,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:24,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-23 14:07:24,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 14:07:24,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:24,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1178204175, now seen corresponding path program 1 times [2022-11-23 14:07:24,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:24,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011955962] [2022-11-23 14:07:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:24,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:24,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:24,462 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:24,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-23 14:07:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:07:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:24,869 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:24,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:25,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:25,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011955962] [2022-11-23 14:07:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011955962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1462944050] [2022-11-23 14:07:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:25,610 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:25,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-23 14:07:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:26,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:26,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1462944050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:26,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131790641] [2022-11-23 14:07:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:26,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:26,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:26,318 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:26,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-23 14:07:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:26,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:26,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:26,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131790641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:26,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:26,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-23 14:07:26,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062281187] [2022-11-23 14:07:26,682 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:26,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:07:26,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:07:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:07:26,684 INFO L87 Difference]: Start difference. First operand 2683 states and 11897 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:30,607 INFO L93 Difference]: Finished difference Result 4101 states and 17797 transitions. [2022-11-23 14:07:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:07:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:30,621 INFO L225 Difference]: With dead ends: 4101 [2022-11-23 14:07:30,621 INFO L226 Difference]: Without dead ends: 4101 [2022-11-23 14:07:30,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:07:30,623 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 786 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:30,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 35 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 14:07:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2022-11-23 14:07:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3689. [2022-11-23 14:07:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3680 states have (on average 4.483967391304348) internal successors, (16501), 3688 states have internal predecessors, (16501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 16501 transitions. [2022-11-23 14:07:30,725 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 16501 transitions. Word has length 10 [2022-11-23 14:07:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:30,725 INFO L495 AbstractCegarLoop]: Abstraction has 3689 states and 16501 transitions. [2022-11-23 14:07:30,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 16501 transitions. [2022-11-23 14:07:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:07:30,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:30,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:30,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:30,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-23 14:07:31,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-23 14:07:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:31,331 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1944981125, now seen corresponding path program 1 times [2022-11-23 14:07:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526286218] [2022-11-23 14:07:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:31,333 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:31,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-23 14:07:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:31,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:07:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:31,721 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:31,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:31,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:32,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:32,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526286218] [2022-11-23 14:07:32,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526286218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:32,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918413263] [2022-11-23 14:07:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:32,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:32,464 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:32,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-23 14:07:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:33,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918413263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338260996] [2022-11-23 14:07:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:33,237 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:33,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-23 14:07:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:33,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:33,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338260996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:33,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:33,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-23 14:07:33,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650323502] [2022-11-23 14:07:33,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:33,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:07:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:07:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:07:33,700 INFO L87 Difference]: Start difference. First operand 3689 states and 16501 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:38,129 INFO L93 Difference]: Finished difference Result 5703 states and 25919 transitions. [2022-11-23 14:07:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:07:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:38,148 INFO L225 Difference]: With dead ends: 5703 [2022-11-23 14:07:38,148 INFO L226 Difference]: Without dead ends: 5703 [2022-11-23 14:07:38,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:07:38,149 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 603 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:38,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 4 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:07:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2022-11-23 14:07:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5151. [2022-11-23 14:07:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5151 states, 5142 states have (on average 4.666472189809412) internal successors, (23995), 5150 states have internal predecessors, (23995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 23995 transitions. [2022-11-23 14:07:38,306 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 23995 transitions. Word has length 11 [2022-11-23 14:07:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:38,307 INFO L495 AbstractCegarLoop]: Abstraction has 5151 states and 23995 transitions. [2022-11-23 14:07:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 23995 transitions. [2022-11-23 14:07:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:07:38,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:38,309 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:38,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:38,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-23 14:07:38,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-23 14:07:38,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:38,922 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:07:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1058771423, now seen corresponding path program 2 times [2022-11-23 14:07:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:38,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382454412] [2022-11-23 14:07:38,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:07:38,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:38,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:38,924 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:38,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-23 14:07:39,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:07:39,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:39,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:07:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:39,439 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:39,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:39,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:41,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382454412] [2022-11-23 14:07:41,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382454412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945964328] [2022-11-23 14:07:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:07:41,538 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:41,539 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:41,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-23 14:07:41,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:07:41,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:07:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:42,188 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:07:42,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:07:42,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:07:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:42,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945964328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058205829] [2022-11-23 14:07:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:07:43,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:43,629 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:43,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-23 14:07:43,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:07:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:43,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:07:43,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:44,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:44,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058205829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:44,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:44,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-23 14:07:44,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973697803] [2022-11-23 14:07:44,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:44,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 14:07:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 14:07:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 14:07:44,538 INFO L87 Difference]: Start difference. First operand 5151 states and 23995 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:19,653 INFO L93 Difference]: Finished difference Result 17473 states and 78443 transitions. [2022-11-23 14:08:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 14:08:19,655 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2022-11-23 14:08:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:19,733 INFO L225 Difference]: With dead ends: 17473 [2022-11-23 14:08:19,733 INFO L226 Difference]: Without dead ends: 17473 [2022-11-23 14:08:19,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=859, Invalid=2801, Unknown=0, NotChecked=0, Total=3660 [2022-11-23 14:08:19,734 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1559 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:19,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1559 Valid, 167 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3217 Invalid, 0 Unknown, 0 Unchecked, 22.6s Time] [2022-11-23 14:08:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17473 states. [2022-11-23 14:08:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17473 to 9209. [2022-11-23 14:08:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9209 states, 9200 states have (on average 4.707282608695652) internal successors, (43307), 9208 states have internal predecessors, (43307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 43307 transitions. [2022-11-23 14:08:20,155 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 43307 transitions. Word has length 12 [2022-11-23 14:08:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:20,155 INFO L495 AbstractCegarLoop]: Abstraction has 9209 states and 43307 transitions. [2022-11-23 14:08:20,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 43307 transitions. [2022-11-23 14:08:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:08:20,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:20,158 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-23 14:08:20,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:20,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 14:08:20,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-23 14:08:20,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:20,764 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:08:20,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:20,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1263166567, now seen corresponding path program 3 times [2022-11-23 14:08:20,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:20,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080109990] [2022-11-23 14:08:20,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:08:20,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:20,766 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-23 14:08:21,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:08:21,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:08:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:08:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:21,407 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:08:21,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:08:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:21,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:25,426 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080109990] [2022-11-23 14:08:25,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080109990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301565736] [2022-11-23 14:08:25,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:08:25,427 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:08:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:08:25,428 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:08:25,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-23 14:08:26,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:08:26,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:08:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:08:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:26,879 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:08:26,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:08:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:27,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:32,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1301565736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595409835] [2022-11-23 14:08:32,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:08:32,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:32,442 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:32,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-23 14:08:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:08:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:08:37,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:08:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:37,359 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:08:37,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:08:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:37,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:43,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595409835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:43,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:08:43,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 50 [2022-11-23 14:08:43,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962211205] [2022-11-23 14:08:43,725 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:08:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 14:08:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 14:08:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=1898, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:08:43,727 INFO L87 Difference]: Start difference. First operand 9209 states and 43307 transitions. Second operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:21,476 INFO L93 Difference]: Finished difference Result 88688 states and 433062 transitions. [2022-11-23 14:09:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:09:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2022-11-23 14:09:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:22,817 INFO L225 Difference]: With dead ends: 88688 [2022-11-23 14:09:22,817 INFO L226 Difference]: Without dead ends: 88688 [2022-11-23 14:09:22,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=1185, Invalid=2597, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 14:09:22,819 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8246 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 5462 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8246 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 5495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:22,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8246 Valid, 171 Invalid, 5495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 5462 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2022-11-23 14:09:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88688 states. [2022-11-23 14:09:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88688 to 9221. [2022-11-23 14:09:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9221 states, 9212 states have (on average 4.703755970473296) internal successors, (43331), 9220 states have internal predecessors, (43331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9221 states to 9221 states and 43331 transitions. [2022-11-23 14:09:24,466 INFO L78 Accepts]: Start accepts. Automaton has 9221 states and 43331 transitions. Word has length 12 [2022-11-23 14:09:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:24,467 INFO L495 AbstractCegarLoop]: Abstraction has 9221 states and 43331 transitions. [2022-11-23 14:09:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 9221 states and 43331 transitions. [2022-11-23 14:09:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:09:24,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:24,471 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:24,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:24,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:24,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:25,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:25,087 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:09:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash -807037423, now seen corresponding path program 2 times [2022-11-23 14:09:25,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:09:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255613368] [2022-11-23 14:09:25,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:09:25,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:25,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:09:25,089 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:09:25,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-23 14:09:25,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:09:25,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:09:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:25,761 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:09:25,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:09:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:28,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:09:28,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255613368] [2022-11-23 14:09:28,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255613368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:28,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [904268088] [2022-11-23 14:09:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:09:28,291 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:09:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:09:28,292 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:09:28,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-23 14:09:28,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:09:28,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:09:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:29,216 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:09:29,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:09:29,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:09:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:29,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:30,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [904268088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763414894] [2022-11-23 14:09:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:09:30,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:30,990 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:30,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-23 14:09:31,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:09:31,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:09:31,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:31,619 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:09:31,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:09:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:32,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:32,720 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 8 treesize of output 6 [2022-11-23 14:09:32,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-23 14:09:32,769 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 14:09:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:35,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763414894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:35,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:09:35,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 45 [2022-11-23 14:09:35,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084265319] [2022-11-23 14:09:35,137 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:35,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 14:09:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:09:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 14:09:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:09:35,139 INFO L87 Difference]: Start difference. First operand 9221 states and 43331 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:25,668 INFO L93 Difference]: Finished difference Result 15825 states and 70771 transitions. [2022-11-23 14:10:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 14:10:25,670 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:10:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:25,741 INFO L225 Difference]: With dead ends: 15825 [2022-11-23 14:10:25,741 INFO L226 Difference]: Without dead ends: 15825 [2022-11-23 14:10:25,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=883, Invalid=4519, Unknown=0, NotChecked=0, Total=5402 [2022-11-23 14:10:25,743 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1640 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 4868 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 4923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:25,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 248 Invalid, 4923 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 4868 Invalid, 0 Unknown, 0 Unchecked, 34.6s Time] [2022-11-23 14:10:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15825 states. [2022-11-23 14:10:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15825 to 10379. [2022-11-23 14:10:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10370 states have (on average 4.646383799421408) internal successors, (48183), 10378 states have internal predecessors, (48183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 48183 transitions. [2022-11-23 14:10:26,069 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 48183 transitions. Word has length 14 [2022-11-23 14:10:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:26,069 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 48183 transitions. [2022-11-23 14:10:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 48183 transitions. [2022-11-23 14:10:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:10:26,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:26,072 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:26,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:10:26,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-23 14:10:26,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-23 14:10:26,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:26,673 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:10:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:26,674 INFO L85 PathProgramCache]: Analyzing trace with hash 538397513, now seen corresponding path program 3 times [2022-11-23 14:10:26,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:26,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132714139] [2022-11-23 14:10:26,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:10:26,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:26,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:26,675 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:26,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-23 14:10:27,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:10:27,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:10:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:10:27,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:27,380 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:10:27,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:10:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:28,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:28,046 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 8 treesize of output 6 [2022-11-23 14:10:28,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-23 14:10:28,089 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 14:10:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:29,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132714139] [2022-11-23 14:10:29,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132714139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:29,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724208158] [2022-11-23 14:10:29,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:10:29,947 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:29,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:29,948 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:29,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-23 14:10:31,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:10:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:10:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:10:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:31,708 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:10:31,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:10:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:32,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:32,932 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 8 treesize of output 6 [2022-11-23 14:10:32,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-23 14:10:32,972 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 14:10:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:33,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724208158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:33,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402746288] [2022-11-23 14:10:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:10:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:33,184 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:33,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-23 14:10:33,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:10:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:10:33,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:10:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:10:34,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:10:36,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402746288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:36,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:10:36,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 49 [2022-11-23 14:10:36,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448322287] [2022-11-23 14:10:36,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:36,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 14:10:36,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 14:10:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 14:10:36,928 INFO L87 Difference]: Start difference. First operand 10379 states and 48183 transitions. Second operand has 50 states, 50 states have (on average 1.3) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:46,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:01,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:11:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:37,862 INFO L93 Difference]: Finished difference Result 22179 states and 100585 transitions. [2022-11-23 14:11:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 14:11:37,865 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:11:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:37,960 INFO L225 Difference]: With dead ends: 22179 [2022-11-23 14:11:37,960 INFO L226 Difference]: Without dead ends: 22179 [2022-11-23 14:11:37,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=878, Invalid=5764, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 14:11:37,962 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2299 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 7292 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 7344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 7292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:37,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2299 Valid, 379 Invalid, 7344 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 7292 Invalid, 0 Unknown, 0 Unchecked, 45.8s Time] [2022-11-23 14:11:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22179 states. [2022-11-23 14:11:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22179 to 16255. [2022-11-23 14:11:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16255 states, 16246 states have (on average 4.77415979317986) internal successors, (77561), 16254 states have internal predecessors, (77561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16255 states to 16255 states and 77561 transitions. [2022-11-23 14:11:38,539 INFO L78 Accepts]: Start accepts. Automaton has 16255 states and 77561 transitions. Word has length 14 [2022-11-23 14:11:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:38,539 INFO L495 AbstractCegarLoop]: Abstraction has 16255 states and 77561 transitions. [2022-11-23 14:11:38,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16255 states and 77561 transitions. [2022-11-23 14:11:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:11:38,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:38,544 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:38,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:38,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-23 14:11:38,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 14:11:39,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:11:39,145 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:11:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash 413507152, now seen corresponding path program 2 times [2022-11-23 14:11:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727629918] [2022-11-23 14:11:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:11:39,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:11:39,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:39,149 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:11:39,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-23 14:11:39,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:11:39,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:11:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:39,733 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:11:39,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:11:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:40,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:42,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727629918] [2022-11-23 14:11:42,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727629918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1535114404] [2022-11-23 14:11:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:11:42,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:11:42,356 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:11:42,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-23 14:11:43,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:11:43,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:11:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:43,378 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:11:43,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:11:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:11:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:11:45,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1535114404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:45,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94758736] [2022-11-23 14:11:45,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:11:45,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:45,702 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:45,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-23 14:11:46,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:11:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:11:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:11:47,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:11:48,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94758736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:48,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:11:48,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 46 [2022-11-23 14:11:48,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904864365] [2022-11-23 14:11:48,306 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-23 14:11:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-23 14:11:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1928, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 14:11:48,308 INFO L87 Difference]: Start difference. First operand 16255 states and 77561 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:29,189 INFO L93 Difference]: Finished difference Result 19743 states and 89607 transitions. [2022-11-23 14:12:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 14:12:29,192 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2022-11-23 14:12:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:29,280 INFO L225 Difference]: With dead ends: 19743 [2022-11-23 14:12:29,280 INFO L226 Difference]: Without dead ends: 19743 [2022-11-23 14:12:29,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=697, Invalid=4415, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 14:12:29,281 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1456 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5833 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:29,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 25 Invalid, 5877 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [44 Valid, 5833 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2022-11-23 14:12:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19743 states. [2022-11-23 14:12:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19743 to 16451. [2022-11-23 14:12:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16451 states, 16442 states have (on average 4.7460771195718285) internal successors, (78035), 16450 states have internal predecessors, (78035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16451 states to 16451 states and 78035 transitions. [2022-11-23 14:12:30,045 INFO L78 Accepts]: Start accepts. Automaton has 16451 states and 78035 transitions. Word has length 15 [2022-11-23 14:12:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:30,045 INFO L495 AbstractCegarLoop]: Abstraction has 16451 states and 78035 transitions. [2022-11-23 14:12:30,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 16451 states and 78035 transitions. [2022-11-23 14:12:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:12:30,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:30,053 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:30,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-23 14:12:30,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-23 14:12:30,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:30,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:30,664 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:12:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1162940177, now seen corresponding path program 3 times [2022-11-23 14:12:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:30,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125235884] [2022-11-23 14:12:30,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:30,666 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:30,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-23 14:12:31,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:12:31,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:12:31,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:31,480 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:12:31,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:12:31,668 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 15 treesize of output 11 [2022-11-23 14:12:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:12:32,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:12:32,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125235884] [2022-11-23 14:12:32,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125235884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:32,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465572171] [2022-11-23 14:12:32,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:32,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:32,889 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:32,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-23 14:12:34,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:12:34,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:12:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:34,707 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:12:34,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:12:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:35,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:35,833 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 8 treesize of output 6 [2022-11-23 14:12:35,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-23 14:12:35,865 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 14:12:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:38,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465572171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893654142] [2022-11-23 14:12:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:38,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:38,714 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:38,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-23 14:12:39,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:12:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:39,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:12:39,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:12:39,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:12:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893654142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:40,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:12:40,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 10, 10] total 45 [2022-11-23 14:12:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749180883] [2022-11-23 14:12:40,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 14:12:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 14:12:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:12:40,529 INFO L87 Difference]: Start difference. First operand 16451 states and 78035 transitions. Second operand has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:34,999 INFO L93 Difference]: Finished difference Result 18237 states and 80335 transitions. [2022-11-23 14:13:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 14:13:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 14:13:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:35,081 INFO L225 Difference]: With dead ends: 18237 [2022-11-23 14:13:35,082 INFO L226 Difference]: Without dead ends: 18237 [2022-11-23 14:13:35,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=835, Invalid=4715, Unknown=0, NotChecked=0, Total=5550 [2022-11-23 14:13:35,083 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2017 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 7858 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 7916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 7858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:35,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2017 Valid, 416 Invalid, 7916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [58 Valid, 7858 Invalid, 0 Unknown, 0 Unchecked, 41.4s Time] [2022-11-23 14:13:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18237 states. [2022-11-23 14:13:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18237 to 15727. [2022-11-23 14:13:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15727 states, 15718 states have (on average 4.583852907494593) internal successors, (72049), 15726 states have internal predecessors, (72049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15727 states to 15727 states and 72049 transitions. [2022-11-23 14:13:35,605 INFO L78 Accepts]: Start accepts. Automaton has 15727 states and 72049 transitions. Word has length 16 [2022-11-23 14:13:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:35,605 INFO L495 AbstractCegarLoop]: Abstraction has 15727 states and 72049 transitions. [2022-11-23 14:13:35,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 15727 states and 72049 transitions. [2022-11-23 14:13:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:13:35,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:35,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:35,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:35,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-23 14:13:36,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:36,223 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:13:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1437951127, now seen corresponding path program 4 times [2022-11-23 14:13:36,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:36,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642914140] [2022-11-23 14:13:36,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:13:36,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:36,225 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:36,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-23 14:13:36,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:13:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:13:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:36,786 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:13:36,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:13:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:13:37,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:13:40,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:40,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642914140] [2022-11-23 14:13:40,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642914140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:40,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159879396] [2022-11-23 14:13:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:13:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:40,814 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:40,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-23 14:13:41,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:13:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:13:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:13:42,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:13:45,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159879396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:45,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102232186] [2022-11-23 14:13:45,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:13:45,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:45,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:45,536 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:45,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-23 14:13:45,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:13:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:13:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:13:47,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:13:49,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102232186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:49,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:49,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 13, 13] total 68 [2022-11-23 14:13:49,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343227325] [2022-11-23 14:13:49,420 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:49,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-23 14:13:49,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-23 14:13:49,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=4144, Unknown=0, NotChecked=0, Total=4830 [2022-11-23 14:13:49,423 INFO L87 Difference]: Start difference. First operand 15727 states and 72049 transitions. Second operand has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:15:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:15:03,972 INFO L93 Difference]: Finished difference Result 23885 states and 106375 transitions. [2022-11-23 14:15:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-23 14:15:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2022-11-23 14:15:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:15:04,082 INFO L225 Difference]: With dead ends: 23885 [2022-11-23 14:15:04,082 INFO L226 Difference]: Without dead ends: 23885 [2022-11-23 14:15:04,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=2365, Invalid=12641, Unknown=0, NotChecked=0, Total=15006 [2022-11-23 14:15:04,085 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4412 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 15510 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4412 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 15650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 15510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:15:04,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4412 Valid, 857 Invalid, 15650 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [140 Valid, 15510 Invalid, 0 Unknown, 0 Unchecked, 42.5s Time] [2022-11-23 14:15:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23885 states. [2022-11-23 14:15:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23885 to 19875. [2022-11-23 14:15:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19866 states have (on average 4.618393234672304) internal successors, (91749), 19874 states have internal predecessors, (91749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:15:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 91749 transitions. [2022-11-23 14:15:04,638 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 91749 transitions. Word has length 16 [2022-11-23 14:15:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:15:04,638 INFO L495 AbstractCegarLoop]: Abstraction has 19875 states and 91749 transitions. [2022-11-23 14:15:04,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:15:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 91749 transitions. [2022-11-23 14:15:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:15:04,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:15:04,647 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:15:04,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-23 14:15:04,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-23 14:15:05,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-23 14:15:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:15:05,256 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:15:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:15:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash 711146075, now seen corresponding path program 3 times [2022-11-23 14:15:05,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:15:05,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124718208] [2022-11-23 14:15:05,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:15:05,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:15:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:15:05,258 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:15:05,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-23 14:15:05,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:15:05,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:15:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:15:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:15:06,203 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:15:06,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:15:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:06,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:15:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:10,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:15:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124718208] [2022-11-23 14:15:10,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124718208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:15:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [328599428] [2022-11-23 14:15:10,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:15:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:15:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:15:10,216 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:15:10,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-23 14:15:11,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:15:11,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:15:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:15:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:15:12,137 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:15:12,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:15:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:15:13,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:15:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [328599428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:15:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691631466] [2022-11-23 14:15:20,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:15:20,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:15:20,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:15:20,330 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:15:20,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-23 14:15:22,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:15:22,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:15:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:15:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:15:22,912 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:15:22,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:15:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:23,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:15:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:26,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691631466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:15:26,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:15:26,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 11, 11, 11] total 51 [2022-11-23 14:15:26,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069910061] [2022-11-23 14:15:26,927 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:15:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 14:15:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:15:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 14:15:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:15:26,929 INFO L87 Difference]: Start difference. First operand 19875 states and 91749 transitions. Second operand has 52 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:16:04,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:17:22,540 INFO L93 Difference]: Finished difference Result 38626 states and 174804 transitions. [2022-11-23 14:17:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 14:17:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:17:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:17:22,737 INFO L225 Difference]: With dead ends: 38626 [2022-11-23 14:17:22,737 INFO L226 Difference]: Without dead ends: 38626 [2022-11-23 14:17:22,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 65.8s TimeCoverageRelationStatistics Valid=1593, Invalid=7337, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 14:17:22,739 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2924 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6390 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2924 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 6463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 6390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:17:22,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2924 Valid, 41 Invalid, 6463 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [73 Valid, 6390 Invalid, 0 Unknown, 0 Unchecked, 62.3s Time] [2022-11-23 14:17:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38626 states. [2022-11-23 14:17:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38626 to 25506. [2022-11-23 14:17:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25506 states, 25497 states have (on average 4.791700984429541) internal successors, (122174), 25505 states have internal predecessors, (122174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:17:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 122174 transitions. [2022-11-23 14:17:23,803 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 122174 transitions. Word has length 17 [2022-11-23 14:17:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:17:23,804 INFO L495 AbstractCegarLoop]: Abstraction has 25506 states and 122174 transitions. [2022-11-23 14:17:23,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:17:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 122174 transitions. [2022-11-23 14:17:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:17:23,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:17:23,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:17:23,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 14:17:24,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-23 14:17:24,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-23 14:17:24,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:17:24,420 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:17:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:17:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -723758544, now seen corresponding path program 4 times [2022-11-23 14:17:24,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:17:24,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373957504] [2022-11-23 14:17:24,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:17:24,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:17:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:17:24,422 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:17:24,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Waiting until timeout for monitored process [2022-11-23 14:17:24,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:17:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:17:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:17:24,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:24,960 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:17:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:17:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:17:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:17:27,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:17:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373957504] [2022-11-23 14:17:27,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373957504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:17:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [979793884] [2022-11-23 14:17:27,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:17:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:17:27,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:17:27,079 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:17:27,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-23 14:17:27,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:17:27,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:17:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:17:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:28,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:30,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [979793884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:17:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391978643] [2022-11-23 14:17:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:17:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:17:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:17:30,208 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:17:30,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-23 14:17:30,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:17:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:17:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:17:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:31,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:31,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391978643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:17:31,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:17:31,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 42 [2022-11-23 14:17:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926540765] [2022-11-23 14:17:31,346 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:17:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 14:17:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:17:31,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 14:17:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:17:31,347 INFO L87 Difference]: Start difference. First operand 25506 states and 122174 transitions. Second operand has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:18:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:15,083 INFO L93 Difference]: Finished difference Result 46590 states and 214238 transitions. [2022-11-23 14:18:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 14:18:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:18:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:15,465 INFO L225 Difference]: With dead ends: 46590 [2022-11-23 14:18:15,465 INFO L226 Difference]: Without dead ends: 46590 [2022-11-23 14:18:15,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1528, Invalid=7028, Unknown=0, NotChecked=0, Total=8556 [2022-11-23 14:18:15,467 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3663 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 9382 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 9482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 9382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:15,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3663 Valid, 40 Invalid, 9482 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [100 Valid, 9382 Invalid, 0 Unknown, 0 Unchecked, 22.1s Time] [2022-11-23 14:18:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46590 states. [2022-11-23 14:18:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46590 to 27717. [2022-11-23 14:18:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27717 states, 27708 states have (on average 4.872058611231413) internal successors, (134995), 27716 states have internal predecessors, (134995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:18:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27717 states to 27717 states and 134995 transitions. [2022-11-23 14:18:17,069 INFO L78 Accepts]: Start accepts. Automaton has 27717 states and 134995 transitions. Word has length 17 [2022-11-23 14:18:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:17,069 INFO L495 AbstractCegarLoop]: Abstraction has 27717 states and 134995 transitions. [2022-11-23 14:18:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:18:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 27717 states and 134995 transitions. [2022-11-23 14:18:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:18:17,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:17,081 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:17,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:17,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:17,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-23 14:18:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:18:17,692 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:18:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2058438385, now seen corresponding path program 4 times [2022-11-23 14:18:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:18:17,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638554035] [2022-11-23 14:18:17,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:18:17,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:18:17,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:18:17,694 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:18:17,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Waiting until timeout for monitored process [2022-11-23 14:18:18,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:18:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:18:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:18:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:18,312 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:18:18,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:18:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:18:19,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:18:22,262 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:18:22,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638554035] [2022-11-23 14:18:22,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638554035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:18:22,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326393054] [2022-11-23 14:18:22,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:18:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:18:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:18:22,263 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:18:22,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-23 14:18:22,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:18:22,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:18:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:18:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:24,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:26,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326393054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:18:26,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180381480] [2022-11-23 14:18:26,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:18:26,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:26,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:26,663 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:26,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-23 14:18:26,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:18:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:18:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:18:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:28,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:30,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180381480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:18:30,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:18:30,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 13, 13] total 68 [2022-11-23 14:18:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097723918] [2022-11-23 14:18:30,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:18:30,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-23 14:18:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:18:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-23 14:18:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=4144, Unknown=0, NotChecked=0, Total=4830 [2022-11-23 14:18:30,514 INFO L87 Difference]: Start difference. First operand 27717 states and 134995 transitions. Second operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 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) [2022-11-23 14:19:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:39,183 INFO L93 Difference]: Finished difference Result 45459 states and 219793 transitions. [2022-11-23 14:19:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-23 14:19:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 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) Word has length 18 [2022-11-23 14:19:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:39,606 INFO L225 Difference]: With dead ends: 45459 [2022-11-23 14:19:39,606 INFO L226 Difference]: Without dead ends: 45459 [2022-11-23 14:19:39,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=2365, Invalid=12641, Unknown=0, NotChecked=0, Total=15006 [2022-11-23 14:19:39,627 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3808 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 14534 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3808 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 14675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 14534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:39,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3808 Valid, 813 Invalid, 14675 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [141 Valid, 14534 Invalid, 0 Unknown, 0 Unchecked, 38.8s Time] [2022-11-23 14:19:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45459 states. [2022-11-23 14:19:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45459 to 39225. [2022-11-23 14:19:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39225 states, 39216 states have (on average 5.009103427172582) internal successors, (196437), 39224 states have internal predecessors, (196437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:19:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39225 states to 39225 states and 196437 transitions. [2022-11-23 14:19:41,580 INFO L78 Accepts]: Start accepts. Automaton has 39225 states and 196437 transitions. Word has length 18 [2022-11-23 14:19:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:41,581 INFO L495 AbstractCegarLoop]: Abstraction has 39225 states and 196437 transitions. [2022-11-23 14:19:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 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) [2022-11-23 14:19:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 39225 states and 196437 transitions. [2022-11-23 14:19:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:19:41,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:41,624 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:41,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:41,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:42,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:42,239 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-23 14:19:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -246494065, now seen corresponding path program 5 times [2022-11-23 14:19:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:19:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236532683] [2022-11-23 14:19:42,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 14:19:42,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:19:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:19:42,244 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:19:42,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-23 14:19:42,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-23 14:19:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:19:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:19:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:43,174 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-23 14:19:43,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-23 14:19:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:19:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:19:49,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:19:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236532683] [2022-11-23 14:19:49,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236532683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224760713] [2022-11-23 14:19:49,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 14:19:49,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:19:49,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:19:49,497 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:19:49,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-23 14:19:56,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-23 14:19:56,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:19:57,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:19:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:59,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:20:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:20:02,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224760713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:20:02,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971610806] [2022-11-23 14:20:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 14:20:02,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:20:02,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:20:02,867 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:20:02,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8acfc72-ab4b-4fe8-be66-94039b9d32e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process