./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/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_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0 --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-e04fb08 [2022-11-16 16:24:50,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:24:50,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:24:50,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:24:50,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:24:50,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:24:50,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:24:50,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:24:50,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:24:50,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:24:50,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:24:50,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:24:50,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:24:50,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:24:50,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:24:50,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:24:50,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:24:50,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:24:50,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:24:50,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:24:50,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:24:50,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:24:50,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:24:50,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:24:50,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:24:50,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:24:50,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:24:50,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:24:50,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:24:50,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:24:50,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:24:50,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:24:50,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:24:50,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:24:50,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:24:50,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:24:50,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:24:50,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:24:50,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:24:50,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:24:50,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:24:50,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 16:24:50,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:24:50,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:24:50,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:24:50,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:24:50,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:24:50,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:24:50,461 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:24:50,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:24:50,462 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:24:50,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:24:50,463 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:24:50,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:24:50,463 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:24:50,463 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:24:50,464 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:24:50,464 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:24:50,464 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:24:50,464 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:24:50,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:24:50,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:24:50,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:24:50,467 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:24:50,467 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:24:50,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:24:50,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:24:50,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:24:50,468 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:24:50,468 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:24:50,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:24:50,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:24:50,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:24:50,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:24:50,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:24:50,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:24:50,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:24:50,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:24:50,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:24:50,470 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:24:50,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:24:50,471 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:24:50,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:24:50,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:24:50,471 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_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-11-16 16:24:50,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:24:50,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:24:50,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:24:50,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:24:50,798 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:24:50,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 16:24:50,884 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/fe3435c0b/edcc329ea9524287ba6f7b01619f531c/FLAGe83d9ee30 [2022-11-16 16:24:51,363 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:24:51,364 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 16:24:51,373 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/fe3435c0b/edcc329ea9524287ba6f7b01619f531c/FLAGe83d9ee30 [2022-11-16 16:24:51,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/fe3435c0b/edcc329ea9524287ba6f7b01619f531c [2022-11-16 16:24:51,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:24:51,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:24:51,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:24:51,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:24:51,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:24:51,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:24:51" (1/1) ... [2022-11-16 16:24:51,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e6e7b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:51, skipping insertion in model container [2022-11-16 16:24:51,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:24:51" (1/1) ... [2022-11-16 16:24:51,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:24:51,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:24:52,013 WARN L229 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_1d30706d-b30e-4dd0-8111-c03feebe717c/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 16:24:52,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:24:52,050 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) [2022-11-16 16:24:52,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ee87b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:52, skipping insertion in model container [2022-11-16 16:24:52,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:24:52,052 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 16:24:52,055 INFO L158 Benchmark]: Toolchain (without parser) took 338.00ms. Allocated memory is still 151.0MB. Free memory was 117.8MB in the beginning and 128.6MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 16:24:52,057 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 90.2MB. Free memory was 62.0MB in the beginning and 62.0MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:24:52,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.80ms. Allocated memory is still 151.0MB. Free memory was 117.4MB in the beginning and 128.6MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 16:24:52,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 90.2MB. Free memory was 62.0MB in the beginning and 62.0MB in the end (delta: 31.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.80ms. Allocated memory is still 151.0MB. Free memory was 117.4MB in the beginning and 128.6MB in the end (delta: -11.2MB). 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/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_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0 --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-e04fb08 [2022-11-16 16:24:54,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:24:54,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:24:54,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:24:54,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:24:54,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:24:54,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:24:54,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:24:54,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:24:54,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:24:54,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:24:54,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:24:54,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:24:54,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:24:54,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:24:54,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:24:54,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:24:54,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:24:54,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:24:54,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:24:54,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:24:54,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:24:54,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:24:54,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:24:54,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:24:54,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:24:54,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:24:54,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:24:54,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:24:54,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:24:54,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:24:54,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:24:54,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:24:54,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:24:54,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:24:54,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:24:54,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:24:54,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:24:54,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:24:54,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:24:54,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:24:54,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 16:24:54,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:24:54,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:24:54,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:24:54,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:24:54,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:24:54,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:24:54,197 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:24:54,198 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:24:54,198 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:24:54,198 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:24:54,198 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:24:54,199 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:24:54,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 16:24:54,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 16:24:54,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:24:54,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:24:54,201 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:24:54,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:24:54,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:24:54,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:24:54,202 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 16:24:54,202 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 16:24:54,202 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 16:24:54,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:24:54,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:24:54,203 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 16:24:54,203 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 16:24:54,204 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:24:54,204 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:24:54,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:24:54,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 16:24:54,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:24:54,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:24:54,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:24:54,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:24:54,206 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 16:24:54,206 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 16:24:54,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:24:54,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 16:24:54,207 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_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-11-16 16:24:54,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:24:54,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:24:54,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:24:54,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:24:54,599 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:24:54,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 16:24:54,681 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/0311451ed/a2e496fac1ad4b00b63fd27b09f8b9f0/FLAGc4d80d460 [2022-11-16 16:24:55,168 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:24:55,168 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 16:24:55,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/0311451ed/a2e496fac1ad4b00b63fd27b09f8b9f0/FLAGc4d80d460 [2022-11-16 16:24:55,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/data/0311451ed/a2e496fac1ad4b00b63fd27b09f8b9f0 [2022-11-16 16:24:55,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:24:55,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:24:55,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:24:55,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:24:55,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:24:55,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5d4cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55, skipping insertion in model container [2022-11-16 16:24:55,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:24:55,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:24:55,744 WARN L229 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_1d30706d-b30e-4dd0-8111-c03feebe717c/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 16:24:55,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:24:55,767 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 16:24:55,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:24:55,790 WARN L229 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_1d30706d-b30e-4dd0-8111-c03feebe717c/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 16:24:55,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:24:55,799 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:24:55,875 WARN L229 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_1d30706d-b30e-4dd0-8111-c03feebe717c/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 16:24:55,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:24:55,912 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:24:55,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55 WrapperNode [2022-11-16 16:24:55,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:24:55,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:24:55,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:24:55,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:24:55,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,962 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-11-16 16:24:55,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:24:55,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:24:55,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:24:55,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:24:55,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:55,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:24:55,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:24:56,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:24:56,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:24:56,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (1/1) ... [2022-11-16 16:24:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:24:56,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:24:56,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:24:56,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:24:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:24:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 16:24:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:24:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 16:24:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 16:24:56,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 16:24:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 16:24:56,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 16:24:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 16:24:56,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 16:24:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 16:24:56,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 16:24:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 16:24:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 16:24:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 16:24:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:24:56,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:24:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:24:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 16:24:56,079 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 16:24:56,226 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:24:56,228 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:24:57,058 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:24:57,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:24:57,251 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 16:24:57,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:24:57 BoogieIcfgContainer [2022-11-16 16:24:57,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:24:57,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:24:57,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:24:57,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:24:57,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:24:55" (1/3) ... [2022-11-16 16:24:57,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550e725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:24:57, skipping insertion in model container [2022-11-16 16:24:57,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:24:55" (2/3) ... [2022-11-16 16:24:57,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550e725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:24:57, skipping insertion in model container [2022-11-16 16:24:57,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:24:57" (3/3) ... [2022-11-16 16:24:57,270 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-11-16 16:24:57,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:24:57,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-16 16:24:57,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:24:57,457 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 16:24:57,508 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:24:57,533 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-16 16:24:57,538 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-16 16:24:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-11-16 16:24:57,669 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-11-16 16:24:57,669 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 16:24:57,683 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. [2022-11-16 16:24:57,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-11-16 16:25:34,789 INFO L134 LiptonReduction]: Checked pairs total: 8689 [2022-11-16 16:25:34,789 INFO L136 LiptonReduction]: Total number of compositions: 206 [2022-11-16 16:25:34,798 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 178 flow [2022-11-16 16:25:35,706 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) [2022-11-16 16:25:35,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:25:35,742 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;@c174d49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:25:35,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-16 16:25:35,774 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) [2022-11-16 16:25:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:25:35,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:35,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:25:35,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 27727, now seen corresponding path program 1 times [2022-11-16 16:25:35,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789715281] [2022-11-16 16:25:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:35,809 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 [2022-11-16 16:25:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:35,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:35,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:25:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:36,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:36,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:36,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789715281] [2022-11-16 16:25:36,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789715281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:36,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:36,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:25:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834563815] [2022-11-16 16:25:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:36,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:25:36,262 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) [2022-11-16 16:25:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:36,782 INFO L93 Difference]: Finished difference Result 4508 states and 18077 transitions. [2022-11-16 16:25:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:36,788 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 [2022-11-16 16:25:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:36,875 INFO L225 Difference]: With dead ends: 4508 [2022-11-16 16:25:36,876 INFO L226 Difference]: Without dead ends: 4508 [2022-11-16 16:25:36,877 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 [2022-11-16 16:25:36,888 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:36,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:25:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-11-16 16:25:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4506. [2022-11-16 16:25:37,387 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) [2022-11-16 16:25:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18077 transitions. [2022-11-16 16:25:37,483 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18077 transitions. Word has length 2 [2022-11-16 16:25:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:37,483 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18077 transitions. [2022-11-16 16:25:37,484 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) [2022-11-16 16:25:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18077 transitions. [2022-11-16 16:25:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:25:37,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:37,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:25:37,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:37,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash 27631, now seen corresponding path program 1 times [2022-11-16 16:25:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389226152] [2022-11-16 16:25:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:37,701 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 [2022-11-16 16:25:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:37,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:37,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:25:37,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:38,111 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 16:25:38,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 16:25:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:38,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:38,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389226152] [2022-11-16 16:25:38,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389226152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:38,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:38,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:25:38,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745138579] [2022-11-16 16:25:38,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:38,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:38,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:25:38,185 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) [2022-11-16 16:25:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:38,561 INFO L93 Difference]: Finished difference Result 4505 states and 18075 transitions. [2022-11-16 16:25:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:38,561 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 [2022-11-16 16:25:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:38,691 INFO L225 Difference]: With dead ends: 4505 [2022-11-16 16:25:38,692 INFO L226 Difference]: Without dead ends: 4505 [2022-11-16 16:25:38,692 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 [2022-11-16 16:25:38,693 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 [2022-11-16 16:25:38,694 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] [2022-11-16 16:25:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-16 16:25:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-16 16:25:39,102 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) [2022-11-16 16:25:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18075 transitions. [2022-11-16 16:25:39,139 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18075 transitions. Word has length 2 [2022-11-16 16:25:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:39,140 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18075 transitions. [2022-11-16 16:25:39,141 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) [2022-11-16 16:25:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18075 transitions. [2022-11-16 16:25:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 16:25:39,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:39,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 16:25:39,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:39,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:39,357 INFO L85 PathProgramCache]: Analyzing trace with hash 27632, now seen corresponding path program 1 times [2022-11-16 16:25:39,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:39,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320090083] [2022-11-16 16:25:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:39,359 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 [2022-11-16 16:25:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:39,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:39,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:25:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:39,744 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:25:39,744 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 [2022-11-16 16:25:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:39,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:39,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:39,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320090083] [2022-11-16 16:25:39,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320090083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:39,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:39,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:25:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62660064] [2022-11-16 16:25:39,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:39,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:39,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:39,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:25:39,854 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) [2022-11-16 16:25:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:40,294 INFO L93 Difference]: Finished difference Result 4505 states and 18074 transitions. [2022-11-16 16:25:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:40,295 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 [2022-11-16 16:25:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:40,358 INFO L225 Difference]: With dead ends: 4505 [2022-11-16 16:25:40,358 INFO L226 Difference]: Without dead ends: 4505 [2022-11-16 16:25:40,358 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 [2022-11-16 16:25:40,360 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 [2022-11-16 16:25:40,362 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] [2022-11-16 16:25:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-16 16:25:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-16 16:25:40,696 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) [2022-11-16 16:25:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18074 transitions. [2022-11-16 16:25:40,792 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18074 transitions. Word has length 2 [2022-11-16 16:25:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:40,806 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18074 transitions. [2022-11-16 16:25:40,808 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) [2022-11-16 16:25:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18074 transitions. [2022-11-16 16:25:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:25:40,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:40,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:25:40,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:41,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash 859364, now seen corresponding path program 1 times [2022-11-16 16:25:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682150534] [2022-11-16 16:25:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:41,023 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 [2022-11-16 16:25:41,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:41,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:41,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:25:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:41,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:41,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:41,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:41,457 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-16 16:25:41,458 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 [2022-11-16 16:25:41,507 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-16 16:25:41,507 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 [2022-11-16 16:25:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:41,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:41,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:41,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682150534] [2022-11-16 16:25:41,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682150534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:41,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:41,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:25:41,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140308990] [2022-11-16 16:25:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:25:41,667 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) [2022-11-16 16:25:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:42,043 INFO L93 Difference]: Finished difference Result 4504 states and 18073 transitions. [2022-11-16 16:25:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:42,043 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 [2022-11-16 16:25:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:42,078 INFO L225 Difference]: With dead ends: 4504 [2022-11-16 16:25:42,078 INFO L226 Difference]: Without dead ends: 4504 [2022-11-16 16:25:42,079 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 [2022-11-16 16:25:42,081 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:42,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 16:25:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2022-11-16 16:25:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4504. [2022-11-16 16:25:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4029 states have (on average 4.485728468602631) internal successors, (18073), 4503 states have internal predecessors, (18073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 18073 transitions. [2022-11-16 16:25:42,285 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 18073 transitions. Word has length 3 [2022-11-16 16:25:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:42,286 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 18073 transitions. [2022-11-16 16:25:42,286 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) [2022-11-16 16:25:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 18073 transitions. [2022-11-16 16:25:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:25:42,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:42,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:25:42,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:42,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:42,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:42,502 INFO L85 PathProgramCache]: Analyzing trace with hash 859365, now seen corresponding path program 1 times [2022-11-16 16:25:42,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:42,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962284774] [2022-11-16 16:25:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:42,503 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 [2022-11-16 16:25:42,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:42,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:42,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:25:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:42,808 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 16:25:42,808 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 69 [2022-11-16 16:25:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:42,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:42,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:42,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962284774] [2022-11-16 16:25:42,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962284774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:42,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:42,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:25:42,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603405221] [2022-11-16 16:25:42,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:42,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:42,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:25:42,984 INFO L87 Difference]: Start difference. First operand 4504 states and 18073 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) [2022-11-16 16:25:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:43,286 INFO L93 Difference]: Finished difference Result 4503 states and 18072 transitions. [2022-11-16 16:25:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:43,287 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 [2022-11-16 16:25:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:43,318 INFO L225 Difference]: With dead ends: 4503 [2022-11-16 16:25:43,318 INFO L226 Difference]: Without dead ends: 4503 [2022-11-16 16:25:43,318 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 [2022-11-16 16:25:43,319 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:43,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-16 16:25:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-11-16 16:25:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4503. [2022-11-16 16:25:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4029 states have (on average 4.485480268056589) internal successors, (18072), 4502 states have internal predecessors, (18072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 18072 transitions. [2022-11-16 16:25:43,502 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 18072 transitions. Word has length 3 [2022-11-16 16:25:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:43,502 INFO L495 AbstractCegarLoop]: Abstraction has 4503 states and 18072 transitions. [2022-11-16 16:25:43,502 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) [2022-11-16 16:25:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 18072 transitions. [2022-11-16 16:25:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 16:25:43,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:43,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 16:25:43,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:43,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 859269, now seen corresponding path program 1 times [2022-11-16 16:25:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:43,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74951623] [2022-11-16 16:25:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:43,718 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 [2022-11-16 16:25:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:43,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:43,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 16:25:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:43,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:25:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:44,083 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:25:44,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:25:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:44,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:44,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:44,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74951623] [2022-11-16 16:25:44,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74951623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:44,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568615718] [2022-11-16 16:25:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:44,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:25:44,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:25:44,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:25:44,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-16 16:25:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:25:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:44,970 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:25:44,970 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 [2022-11-16 16:25:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:45,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568615718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455717337] [2022-11-16 16:25:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:45,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:25:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:25:45,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:25:45,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:25:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:45,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:25:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:45,568 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:25:45,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:25:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:45,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:45,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455717337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:45,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:25:45,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-16 16:25:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336803882] [2022-11-16 16:25:45,855 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:25:45,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 16:25:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 16:25:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:25:45,856 INFO L87 Difference]: Start difference. First operand 4503 states and 18072 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:48,595 INFO L93 Difference]: Finished difference Result 13504 states and 54212 transitions. [2022-11-16 16:25:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:25:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 16:25:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:48,719 INFO L225 Difference]: With dead ends: 13504 [2022-11-16 16:25:48,719 INFO L226 Difference]: Without dead ends: 13504 [2022-11-16 16:25:48,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:25:48,720 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 370 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:48,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 15 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 16:25:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13504 states. [2022-11-16 16:25:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13504 to 4506. [2022-11-16 16:25:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4032 states have (on average 4.4836309523809526) internal successors, (18078), 4505 states have internal predecessors, (18078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18078 transitions. [2022-11-16 16:25:49,154 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18078 transitions. Word has length 3 [2022-11-16 16:25:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:49,154 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18078 transitions. [2022-11-16 16:25:49,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18078 transitions. [2022-11-16 16:25:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:25:49,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:49,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:25:49,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:49,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:49,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:25:49,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash 825867783, now seen corresponding path program 1 times [2022-11-16 16:25:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791838291] [2022-11-16 16:25:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:49,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:49,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:49,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 16:25:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:49,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:25:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:50,052 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 16:25:50,053 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 [2022-11-16 16:25:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:50,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:50,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791838291] [2022-11-16 16:25:50,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791838291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:50,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:50,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:25:50,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162417530] [2022-11-16 16:25:50,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:50,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:25:50,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:25:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:25:50,093 INFO L87 Difference]: Start difference. First operand 4506 states and 18078 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) [2022-11-16 16:25:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:50,339 INFO L93 Difference]: Finished difference Result 2138 states and 8458 transitions. [2022-11-16 16:25:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:25:50,339 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 [2022-11-16 16:25:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:50,353 INFO L225 Difference]: With dead ends: 2138 [2022-11-16 16:25:50,353 INFO L226 Difference]: Without dead ends: 2138 [2022-11-16 16:25:50,354 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 [2022-11-16 16:25:50,354 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:50,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:25:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-11-16 16:25:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2138. [2022-11-16 16:25:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2005 states have (on average 4.218453865336659) internal successors, (8458), 2137 states have internal predecessors, (8458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 8458 transitions. [2022-11-16 16:25:50,426 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 8458 transitions. Word has length 5 [2022-11-16 16:25:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:50,427 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 8458 transitions. [2022-11-16 16:25:50,427 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) [2022-11-16 16:25:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 8458 transitions. [2022-11-16 16:25:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:25:50,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:50,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:25:50,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:50,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:50,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash 825867784, now seen corresponding path program 1 times [2022-11-16 16:25:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:50,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180882924] [2022-11-16 16:25:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:50,643 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 [2022-11-16 16:25:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:50,645 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:50,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:25:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:50,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:50,945 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 [2022-11-16 16:25:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:51,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180882924] [2022-11-16 16:25:51,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180882924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235235289] [2022-11-16 16:25:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:25:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:25:51,030 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:25:51,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-16 16:25:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:25:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:51,440 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:25:51,440 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 [2022-11-16 16:25:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:51,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:51,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235235289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:51,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202920280] [2022-11-16 16:25:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:51,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:25:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:25:51,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:25:51,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 16:25:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:25:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:52,350 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:25:52,350 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 [2022-11-16 16:25:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:52,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:52,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202920280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:52,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:25:52,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3, 3, 3] total 13 [2022-11-16 16:25:52,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719396373] [2022-11-16 16:25:52,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:25:52,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:25:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:25:52,531 INFO L87 Difference]: Start difference. First operand 2138 states and 8458 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) [2022-11-16 16:25:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:52,691 INFO L93 Difference]: Finished difference Result 2137 states and 8454 transitions. [2022-11-16 16:25:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:25:52,691 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 [2022-11-16 16:25:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:52,705 INFO L225 Difference]: With dead ends: 2137 [2022-11-16 16:25:52,705 INFO L226 Difference]: Without dead ends: 2137 [2022-11-16 16:25:52,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:25:52,706 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:52,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-11-16 16:25:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-11-16 16:25:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2137. [2022-11-16 16:25:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2004 states have (on average 4.218562874251497) internal successors, (8454), 2136 states have internal predecessors, (8454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8454 transitions. [2022-11-16 16:25:52,776 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8454 transitions. Word has length 5 [2022-11-16 16:25:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:52,777 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 8454 transitions. [2022-11-16 16:25:52,777 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) [2022-11-16 16:25:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8454 transitions. [2022-11-16 16:25:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:25:52,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:52,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:25:52,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:53,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:53,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-16 16:25:53,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:25:53,397 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:53,397 INFO L85 PathProgramCache]: Analyzing trace with hash 825868011, now seen corresponding path program 1 times [2022-11-16 16:25:53,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:53,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423350743] [2022-11-16 16:25:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:53,398 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 [2022-11-16 16:25:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:53,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:53,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 16:25:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:25:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:53,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:53,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:53,766 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-16 16:25:53,766 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 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-16 16:25:53,818 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 16:25:53,818 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 308 treesize of output 303 [2022-11-16 16:25:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:54,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:54,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:54,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423350743] [2022-11-16 16:25:54,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423350743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:54,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986943187] [2022-11-16 16:25:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:25:54,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:25:54,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:25:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-16 16:25:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:25:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:55,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:25:55,209 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 [2022-11-16 16:25:55,244 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:25:55,245 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 61 treesize of output 57 [2022-11-16 16:25:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:55,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:55,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986943187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:55,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:25:55,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:25:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364358666] [2022-11-16 16:25:55,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:55,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:25:55,513 INFO L87 Difference]: Start difference. First operand 2137 states and 8454 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) [2022-11-16 16:25:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:55,650 INFO L93 Difference]: Finished difference Result 2135 states and 8451 transitions. [2022-11-16 16:25:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:55,650 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 [2022-11-16 16:25:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:55,662 INFO L225 Difference]: With dead ends: 2135 [2022-11-16 16:25:55,662 INFO L226 Difference]: Without dead ends: 2135 [2022-11-16 16:25:55,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:25:55,663 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:55,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-16 16:25:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-11-16 16:25:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2135. [2022-11-16 16:25:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2003 states have (on average 4.219171243135297) internal successors, (8451), 2134 states have internal predecessors, (8451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 8451 transitions. [2022-11-16 16:25:55,736 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 8451 transitions. Word has length 5 [2022-11-16 16:25:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:55,736 INFO L495 AbstractCegarLoop]: Abstraction has 2135 states and 8451 transitions. [2022-11-16 16:25:55,737 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) [2022-11-16 16:25:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 8451 transitions. [2022-11-16 16:25:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:25:55,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:55,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:25:55,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:55,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:56,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:56,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash 825868012, now seen corresponding path program 1 times [2022-11-16 16:25:56,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310081919] [2022-11-16 16:25:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:56,150 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 [2022-11-16 16:25:56,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:56,151 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:56,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 16:25:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:25:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:56,414 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 16:25:56,415 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 66 [2022-11-16 16:25:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:56,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:56,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310081919] [2022-11-16 16:25:56,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310081919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:56,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:25:56,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:25:56,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544892920] [2022-11-16 16:25:56,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:56,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:56,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:56,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:56,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:25:56,546 INFO L87 Difference]: Start difference. First operand 2135 states and 8451 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) [2022-11-16 16:25:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:56,693 INFO L93 Difference]: Finished difference Result 2133 states and 8448 transitions. [2022-11-16 16:25:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:56,694 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 [2022-11-16 16:25:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:56,705 INFO L225 Difference]: With dead ends: 2133 [2022-11-16 16:25:56,705 INFO L226 Difference]: Without dead ends: 2133 [2022-11-16 16:25:56,706 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 [2022-11-16 16:25:56,706 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:56,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 16:25:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2022-11-16 16:25:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 2133. [2022-11-16 16:25:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2002 states have (on average 4.21978021978022) internal successors, (8448), 2132 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 8448 transitions. [2022-11-16 16:25:56,792 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 8448 transitions. Word has length 5 [2022-11-16 16:25:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:56,792 INFO L495 AbstractCegarLoop]: Abstraction has 2133 states and 8448 transitions. [2022-11-16 16:25:56,792 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) [2022-11-16 16:25:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 8448 transitions. [2022-11-16 16:25:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:25:56,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:56,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:25:56,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:57,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:57,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash -167901648, now seen corresponding path program 1 times [2022-11-16 16:25:57,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726015149] [2022-11-16 16:25:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:25:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:57,008 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:57,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:25:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 16:25:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:57,388 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 16:25:57,389 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 [2022-11-16 16:25:57,426 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:25:57,426 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 [2022-11-16 16:25:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:57,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:25:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:25:58,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:25:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726015149] [2022-11-16 16:25:58,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726015149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:25:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409262972] [2022-11-16 16:25:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:58,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:25:58,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:25:58,231 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:25:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-16 16:25:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:25:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:58,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:58,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:58,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:25:58,639 INFO L321 Elim1Store]: treesize reduction 101, result has 22.9 percent of original size [2022-11-16 16:25:58,639 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 3 case distinctions, treesize of input 18 treesize of output 40 [2022-11-16 16:25:58,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 16:25:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:25:58,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:25:58,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409262972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:25:58,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:25:58,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:25:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019442645] [2022-11-16 16:25:58,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:25:58,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:25:58,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:25:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:25:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:25:58,844 INFO L87 Difference]: Start difference. First operand 2133 states and 8448 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:25:58,986 INFO L93 Difference]: Finished difference Result 2132 states and 8446 transitions. [2022-11-16 16:25:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:25:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 16:25:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:25:58,995 INFO L225 Difference]: With dead ends: 2132 [2022-11-16 16:25:58,995 INFO L226 Difference]: Without dead ends: 2132 [2022-11-16 16:25:58,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:25:58,996 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:25:58,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-16 16:25:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-11-16 16:25:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2132. [2022-11-16 16:25:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2001 states have (on average 4.220889555222389) internal successors, (8446), 2131 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 8446 transitions. [2022-11-16 16:25:59,056 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 8446 transitions. Word has length 6 [2022-11-16 16:25:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:25:59,057 INFO L495 AbstractCegarLoop]: Abstraction has 2132 states and 8446 transitions. [2022-11-16 16:25:59,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:25:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 8446 transitions. [2022-11-16 16:25:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:25:59,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:25:59,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:25:59,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-16 16:25:59,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-16 16:25:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:25:59,469 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:25:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:25:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -167901647, now seen corresponding path program 1 times [2022-11-16 16:25:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:25:59,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442082029] [2022-11-16 16:25:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:25:59,470 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 [2022-11-16 16:25:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:25:59,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:25:59,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 16:25:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:25:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 16:25:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:25:59,721 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 16:25:59,722 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 [2022-11-16 16:26:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:00,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:00,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:00,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442082029] [2022-11-16 16:26:00,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442082029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:00,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:00,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:26:00,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953268872] [2022-11-16 16:26:00,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:00,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:00,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:00,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:00,010 INFO L87 Difference]: Start difference. First operand 2132 states and 8446 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:00,152 INFO L93 Difference]: Finished difference Result 2131 states and 8444 transitions. [2022-11-16 16:26:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 16:26:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:00,160 INFO L225 Difference]: With dead ends: 2131 [2022-11-16 16:26:00,161 INFO L226 Difference]: Without dead ends: 2131 [2022-11-16 16:26:00,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:00,168 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:00,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 16:26:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-11-16 16:26:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2131. [2022-11-16 16:26:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2000 states have (on average 4.222) internal successors, (8444), 2130 states have internal predecessors, (8444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 8444 transitions. [2022-11-16 16:26:00,229 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 8444 transitions. Word has length 6 [2022-11-16 16:26:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:00,229 INFO L495 AbstractCegarLoop]: Abstraction has 2131 states and 8444 transitions. [2022-11-16 16:26:00,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 8444 transitions. [2022-11-16 16:26:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:26:00,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:00,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 16:26:00,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:00,438 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -167894900, now seen corresponding path program 1 times [2022-11-16 16:26:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:00,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839860626] [2022-11-16 16:26:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:00,439 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 [2022-11-16 16:26:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:00,440 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:00,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 16:26:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:00,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:00,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:00,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:00,706 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 [2022-11-16 16:26:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:00,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:00,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839860626] [2022-11-16 16:26:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839860626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1855915008] [2022-11-16 16:26:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:00,762 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:00,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:00,766 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:00,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-16 16:26:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:26:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:01,166 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:01,166 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 [2022-11-16 16:26:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:01,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:01,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1855915008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:01,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903790765] [2022-11-16 16:26:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:01,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:01,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:01,606 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:26:01,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 16:26:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:26:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:01,949 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:01,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:26:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:02,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:02,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903790765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:02,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:26:02,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3, 3, 3] total 13 [2022-11-16 16:26:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542963591] [2022-11-16 16:26:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:02,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:26:02,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:26:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:26:02,111 INFO L87 Difference]: Start difference. First operand 2131 states and 8444 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:02,267 INFO L93 Difference]: Finished difference Result 2130 states and 8442 transitions. [2022-11-16 16:26:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:26:02,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 16:26:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:02,276 INFO L225 Difference]: With dead ends: 2130 [2022-11-16 16:26:02,276 INFO L226 Difference]: Without dead ends: 2130 [2022-11-16 16:26:02,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:26:02,277 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:02,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-11-16 16:26:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2022-11-16 16:26:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2130. [2022-11-16 16:26:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1999 states have (on average 4.223111555777889) internal successors, (8442), 2129 states have internal predecessors, (8442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 8442 transitions. [2022-11-16 16:26:02,335 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 8442 transitions. Word has length 6 [2022-11-16 16:26:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:02,336 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 8442 transitions. [2022-11-16 16:26:02,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 8442 transitions. [2022-11-16 16:26:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:26:02,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:02,337 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 16:26:02,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 16:26:02,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:02,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:02,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:02,943 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash -168662736, now seen corresponding path program 2 times [2022-11-16 16:26:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510119463] [2022-11-16 16:26:02,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:26:02,944 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 [2022-11-16 16:26:02,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:02,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:02,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 16:26:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:26:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:26:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:26:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:03,294 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:03,294 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 [2022-11-16 16:26:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:03,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:04,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510119463] [2022-11-16 16:26:04,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510119463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734136652] [2022-11-16 16:26:04,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:26:04,151 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:04,152 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:04,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-16 16:26:04,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:26:04,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:26:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:26:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:04,683 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:04,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:26:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:04,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:05,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1734136652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:05,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92537236] [2022-11-16 16:26:05,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:26:05,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:05,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:05,653 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:26:05,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 16:26:05,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:26:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:26:05,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:26:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:06,016 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:06,016 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 [2022-11-16 16:26:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:06,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92537236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:06,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:26:06,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-16 16:26:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882522999] [2022-11-16 16:26:06,413 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:26:06,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 16:26:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:06,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 16:26:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-16 16:26:06,414 INFO L87 Difference]: Start difference. First operand 2130 states and 8442 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) [2022-11-16 16:26:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:14,283 INFO L93 Difference]: Finished difference Result 19120 states and 75902 transitions. [2022-11-16 16:26:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:26:14,285 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 [2022-11-16 16:26:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:14,351 INFO L225 Difference]: With dead ends: 19120 [2022-11-16 16:26:14,351 INFO L226 Difference]: Without dead ends: 19120 [2022-11-16 16:26:14,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:26:14,352 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1440 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:14,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 35 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-16 16:26:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19120 states. [2022-11-16 16:26:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19120 to 2136. [2022-11-16 16:26:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2005 states have (on average 4.216458852867831) internal successors, (8454), 2135 states have internal predecessors, (8454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 8454 transitions. [2022-11-16 16:26:14,584 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 8454 transitions. Word has length 6 [2022-11-16 16:26:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:14,585 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 8454 transitions. [2022-11-16 16:26:14,585 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) [2022-11-16 16:26:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 8454 transitions. [2022-11-16 16:26:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:14,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:14,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:14,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:14,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 16:26:14,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-16 16:26:15,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:15,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -909985300, now seen corresponding path program 1 times [2022-11-16 16:26:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:15,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113997544] [2022-11-16 16:26:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:15,191 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 [2022-11-16 16:26:15,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:15,192 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:15,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 16:26:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:26:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:15,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:15,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113997544] [2022-11-16 16:26:15,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113997544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:15,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:15,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:26:15,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722242000] [2022-11-16 16:26:15,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:15,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:26:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:26:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:26:15,368 INFO L87 Difference]: Start difference. First operand 2136 states and 8454 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) [2022-11-16 16:26:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:15,852 INFO L93 Difference]: Finished difference Result 3146 states and 11652 transitions. [2022-11-16 16:26:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:26:15,856 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 [2022-11-16 16:26:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:15,865 INFO L225 Difference]: With dead ends: 3146 [2022-11-16 16:26:15,865 INFO L226 Difference]: Without dead ends: 3146 [2022-11-16 16:26:15,866 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 [2022-11-16 16:26:15,866 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 232 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:15,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 5 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:26:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-16 16:26:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2560. [2022-11-16 16:26:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2429 states have (on average 4.087278715520791) internal successors, (9928), 2559 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 9928 transitions. [2022-11-16 16:26:15,941 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 9928 transitions. Word has length 7 [2022-11-16 16:26:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:15,941 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 9928 transitions. [2022-11-16 16:26:15,942 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) [2022-11-16 16:26:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 9928 transitions. [2022-11-16 16:26:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:15,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:15,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:15,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:16,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:16,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash -909985200, now seen corresponding path program 1 times [2022-11-16 16:26:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:16,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440754052] [2022-11-16 16:26:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:16,154 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 [2022-11-16 16:26:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:16,155 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:16,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 16:26:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 16:26:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:16,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:16,487 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 16:26:16,488 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 [2022-11-16 16:26:16,515 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:26:16,515 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 [2022-11-16 16:26:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:17,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:17,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:17,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440754052] [2022-11-16 16:26:17,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440754052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:17,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879646022] [2022-11-16 16:26:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:17,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:17,317 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:17,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-16 16:26:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:17,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:26:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:17,838 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:26:17,839 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 [2022-11-16 16:26:17,874 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:26:17,875 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 92 treesize of output 86 [2022-11-16 16:26:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:18,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:18,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879646022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:18,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:18,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084996404] [2022-11-16 16:26:18,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:18,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:18,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:18,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:18,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:18,091 INFO L87 Difference]: Start difference. First operand 2560 states and 9928 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) [2022-11-16 16:26:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:18,235 INFO L93 Difference]: Finished difference Result 2559 states and 9925 transitions. [2022-11-16 16:26:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:18,236 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 [2022-11-16 16:26:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:18,242 INFO L225 Difference]: With dead ends: 2559 [2022-11-16 16:26:18,243 INFO L226 Difference]: Without dead ends: 2559 [2022-11-16 16:26:18,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:18,243 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:18,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-16 16:26:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-11-16 16:26:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2559. [2022-11-16 16:26:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2428 states have (on average 4.087726523887974) internal successors, (9925), 2558 states have internal predecessors, (9925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 9925 transitions. [2022-11-16 16:26:18,306 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 9925 transitions. Word has length 7 [2022-11-16 16:26:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:18,306 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 9925 transitions. [2022-11-16 16:26:18,306 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) [2022-11-16 16:26:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 9925 transitions. [2022-11-16 16:26:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:18,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:18,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:18,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-16 16:26:18,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:18,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:18,708 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -909985199, now seen corresponding path program 1 times [2022-11-16 16:26:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:18,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248931102] [2022-11-16 16:26:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:18,709 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 [2022-11-16 16:26:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:18,710 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:18,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 16:26:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:26:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:18,957 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 16:26:18,958 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 66 [2022-11-16 16:26:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:19,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:19,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248931102] [2022-11-16 16:26:19,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248931102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:19,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:19,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:26:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737189717] [2022-11-16 16:26:19,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:19,110 INFO L87 Difference]: Start difference. First operand 2559 states and 9925 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) [2022-11-16 16:26:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:19,248 INFO L93 Difference]: Finished difference Result 2558 states and 9922 transitions. [2022-11-16 16:26:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:19,248 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 [2022-11-16 16:26:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:19,257 INFO L225 Difference]: With dead ends: 2558 [2022-11-16 16:26:19,258 INFO L226 Difference]: Without dead ends: 2558 [2022-11-16 16:26:19,258 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 [2022-11-16 16:26:19,260 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:19,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 16:26:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-11-16 16:26:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2558. [2022-11-16 16:26:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2427 states have (on average 4.088174701277297) internal successors, (9922), 2557 states have internal predecessors, (9922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 9922 transitions. [2022-11-16 16:26:19,397 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 9922 transitions. Word has length 7 [2022-11-16 16:26:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:19,398 INFO L495 AbstractCegarLoop]: Abstraction has 2558 states and 9922 transitions. [2022-11-16 16:26:19,398 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) [2022-11-16 16:26:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 9922 transitions. [2022-11-16 16:26:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:19,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:19,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:19,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:19,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:19,611 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -909772099, now seen corresponding path program 1 times [2022-11-16 16:26:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:19,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93539103] [2022-11-16 16:26:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:19,612 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 [2022-11-16 16:26:19,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:19,613 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:19,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:26:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:26:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:19,900 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-11-16 16:26:19,901 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 [2022-11-16 16:26:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:19,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:19,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:19,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93539103] [2022-11-16 16:26:19,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93539103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:19,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:19,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:26:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136104882] [2022-11-16 16:26:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:19,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:19,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:19,943 INFO L87 Difference]: Start difference. First operand 2558 states and 9922 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) [2022-11-16 16:26:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:20,148 INFO L93 Difference]: Finished difference Result 2508 states and 9779 transitions. [2022-11-16 16:26:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:20,149 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 [2022-11-16 16:26:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:20,161 INFO L225 Difference]: With dead ends: 2508 [2022-11-16 16:26:20,161 INFO L226 Difference]: Without dead ends: 2508 [2022-11-16 16:26:20,161 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 [2022-11-16 16:26:20,162 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:20,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:26:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2022-11-16 16:26:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2022-11-16 16:26:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2388 states have (on average 4.095058626465661) internal successors, (9779), 2507 states have internal predecessors, (9779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 9779 transitions. [2022-11-16 16:26:20,253 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 9779 transitions. Word has length 7 [2022-11-16 16:26:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:20,254 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 9779 transitions. [2022-11-16 16:26:20,254 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) [2022-11-16 16:26:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 9779 transitions. [2022-11-16 16:26:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:20,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:20,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:20,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:26:20,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:20,467 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash -909772097, now seen corresponding path program 1 times [2022-11-16 16:26:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:20,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199331260] [2022-11-16 16:26:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:20,468 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 [2022-11-16 16:26:20,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:20,469 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:20,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:26:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:26:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:20,868 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:26:20,868 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 [2022-11-16 16:26:20,886 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 [2022-11-16 16:26:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:21,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:21,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199331260] [2022-11-16 16:26:21,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199331260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1220975589] [2022-11-16 16:26:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:21,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:21,446 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:21,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-16 16:26:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:21,923 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:26:21,923 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 [2022-11-16 16:26:21,946 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 84 treesize of output 82 [2022-11-16 16:26:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:22,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:22,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1220975589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:22,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:22,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273531847] [2022-11-16 16:26:22,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:22,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:22,128 INFO L87 Difference]: Start difference. First operand 2508 states and 9779 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) [2022-11-16 16:26:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:22,287 INFO L93 Difference]: Finished difference Result 2507 states and 9774 transitions. [2022-11-16 16:26:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:22,288 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 [2022-11-16 16:26:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:22,300 INFO L225 Difference]: With dead ends: 2507 [2022-11-16 16:26:22,300 INFO L226 Difference]: Without dead ends: 2507 [2022-11-16 16:26:22,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:22,301 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:22,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 16:26:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-11-16 16:26:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2507. [2022-11-16 16:26:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2387 states have (on average 4.094679514034353) internal successors, (9774), 2506 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 9774 transitions. [2022-11-16 16:26:22,385 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 9774 transitions. Word has length 7 [2022-11-16 16:26:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:22,385 INFO L495 AbstractCegarLoop]: Abstraction has 2507 states and 9774 transitions. [2022-11-16 16:26:22,385 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) [2022-11-16 16:26:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 9774 transitions. [2022-11-16 16:26:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:22,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:22,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:22,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:22,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 16:26:22,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:22,790 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -909772333, now seen corresponding path program 1 times [2022-11-16 16:26:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:22,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316559903] [2022-11-16 16:26:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:22,790 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 [2022-11-16 16:26:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:22,791 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:22,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 16:26:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:22,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:23,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:23,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 16:26:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:23,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316559903] [2022-11-16 16:26:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316559903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1804411482] [2022-11-16 16:26:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:23,175 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:23,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 16:26:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:26:23,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:23,597 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:23,598 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 [2022-11-16 16:26:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:23,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:24,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1804411482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545527673] [2022-11-16 16:26:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:24,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:24,039 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:26:24,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 16:26:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:24,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:26:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:24,417 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:24,417 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 [2022-11-16 16:26:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:24,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:24,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545527673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:24,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:26:24,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3, 3, 3] total 13 [2022-11-16 16:26:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846921834] [2022-11-16 16:26:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:26:24,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:26:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:26:24,586 INFO L87 Difference]: Start difference. First operand 2507 states and 9774 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:24,718 INFO L93 Difference]: Finished difference Result 2497 states and 9751 transitions. [2022-11-16 16:26:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:26:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:26:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:24,727 INFO L225 Difference]: With dead ends: 2497 [2022-11-16 16:26:24,727 INFO L226 Difference]: Without dead ends: 2497 [2022-11-16 16:26:24,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:26:24,728 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:24,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-11-16 16:26:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-16 16:26:24,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2497. [2022-11-16 16:26:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2379 states have (on average 4.098781000420344) internal successors, (9751), 2496 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 9751 transitions. [2022-11-16 16:26:24,816 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 9751 transitions. Word has length 7 [2022-11-16 16:26:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:24,816 INFO L495 AbstractCegarLoop]: Abstraction has 2497 states and 9751 transitions. [2022-11-16 16:26:24,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 9751 transitions. [2022-11-16 16:26:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:26:24,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:24,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:24,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:25,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-16 16:26:25,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-16 16:26:25,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:25,429 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash -909772315, now seen corresponding path program 1 times [2022-11-16 16:26:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964077260] [2022-11-16 16:26:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:25,430 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 [2022-11-16 16:26:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:25,431 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:25,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 16:26:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:25,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:25,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:25,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:25,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 16:26:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:25,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964077260] [2022-11-16 16:26:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964077260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1122720617] [2022-11-16 16:26:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:25,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:25,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:25,846 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:25,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-16 16:26:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:26:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:26,346 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:26,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:26:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:26,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:26,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1122720617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416409643] [2022-11-16 16:26:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:26,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:26,787 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:26:26,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 16:26:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:26:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:27,190 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:27,190 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 [2022-11-16 16:26:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:27,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:27,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416409643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:27,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:26:27,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3, 3, 3] total 13 [2022-11-16 16:26:27,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098190078] [2022-11-16 16:26:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:27,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:26:27,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:26:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:26:27,403 INFO L87 Difference]: Start difference. First operand 2497 states and 9751 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:27,563 INFO L93 Difference]: Finished difference Result 2483 states and 9720 transitions. [2022-11-16 16:26:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:26:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:26:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:27,575 INFO L225 Difference]: With dead ends: 2483 [2022-11-16 16:26:27,575 INFO L226 Difference]: Without dead ends: 2483 [2022-11-16 16:26:27,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:26:27,576 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:27,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-11-16 16:26:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2022-11-16 16:26:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2483. [2022-11-16 16:26:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2368 states have (on average 4.10472972972973) internal successors, (9720), 2482 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 9720 transitions. [2022-11-16 16:26:27,674 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 9720 transitions. Word has length 7 [2022-11-16 16:26:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:27,674 INFO L495 AbstractCegarLoop]: Abstraction has 2483 states and 9720 transitions. [2022-11-16 16:26:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 9720 transitions. [2022-11-16 16:26:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:26:27,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:27,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:27,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-16 16:26:27,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-16 16:26:28,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:28,278 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230045, now seen corresponding path program 1 times [2022-11-16 16:26:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519964363] [2022-11-16 16:26:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:28,279 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 [2022-11-16 16:26:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:28,281 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:28,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 16:26:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:28,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:28,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:28,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519964363] [2022-11-16 16:26:28,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519964363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:28,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:28,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:26:28,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243604619] [2022-11-16 16:26:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:26:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:26:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:26:28,505 INFO L87 Difference]: Start difference. First operand 2483 states and 9720 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:28,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:28,844 INFO L93 Difference]: Finished difference Result 2483 states and 9414 transitions. [2022-11-16 16:26:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:26:28,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:26:28,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:28,853 INFO L225 Difference]: With dead ends: 2483 [2022-11-16 16:26:28,853 INFO L226 Difference]: Without dead ends: 2483 [2022-11-16 16:26:28,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:26:28,854 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 7 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:26:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2022-11-16 16:26:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2483. [2022-11-16 16:26:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2368 states have (on average 3.9755067567567566) internal successors, (9414), 2482 states have internal predecessors, (9414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 9414 transitions. [2022-11-16 16:26:28,920 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 9414 transitions. Word has length 8 [2022-11-16 16:26:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:28,920 INFO L495 AbstractCegarLoop]: Abstraction has 2483 states and 9414 transitions. [2022-11-16 16:26:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 9414 transitions. [2022-11-16 16:26:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:26:28,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:28,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:28,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:29,130 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230162, now seen corresponding path program 1 times [2022-11-16 16:26:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839057277] [2022-11-16 16:26:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:29,131 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 [2022-11-16 16:26:29,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:29,132 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:29,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 16:26:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:29,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:26:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:29,500 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:29,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:26:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:29,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:30,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839057277] [2022-11-16 16:26:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839057277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148915598] [2022-11-16 16:26:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:30,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:30,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:30,147 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:30,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-16 16:26:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:30,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:26:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:30,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148915598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:30,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422900602] [2022-11-16 16:26:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:30,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:26:30,974 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:26:30,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 16:26:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:26:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:31,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:31,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422900602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:31,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:26:31,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 21 [2022-11-16 16:26:31,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657842531] [2022-11-16 16:26:31,398 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:26:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 16:26:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 16:26:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:26:31,399 INFO L87 Difference]: Start difference. First operand 2483 states and 9414 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:37,199 INFO L93 Difference]: Finished difference Result 4540 states and 18251 transitions. [2022-11-16 16:26:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 16:26:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:26:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:37,215 INFO L225 Difference]: With dead ends: 4540 [2022-11-16 16:26:37,215 INFO L226 Difference]: Without dead ends: 4540 [2022-11-16 16:26:37,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:26:37,216 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 836 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:37,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 40 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 16:26:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2022-11-16 16:26:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3562. [2022-11-16 16:26:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3501 states have (on average 4.311625249928592) internal successors, (15095), 3561 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 15095 transitions. [2022-11-16 16:26:37,337 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 15095 transitions. Word has length 8 [2022-11-16 16:26:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:37,337 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 15095 transitions. [2022-11-16 16:26:37,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:37,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 15095 transitions. [2022-11-16 16:26:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:26:37,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:37,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:37,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:37,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-16 16:26:37,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-16 16:26:37,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:26:37,953 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230262, now seen corresponding path program 1 times [2022-11-16 16:26:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:37,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741286221] [2022-11-16 16:26:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:37,954 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 [2022-11-16 16:26:37,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:37,955 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:37,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 16:26:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 16:26:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:38,380 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 16:26:38,380 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 [2022-11-16 16:26:38,407 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:26:38,408 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 [2022-11-16 16:26:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:38,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:39,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741286221] [2022-11-16 16:26:39,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741286221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:39,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1532727542] [2022-11-16 16:26:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:39,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:39,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:39,202 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:39,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-16 16:26:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:26:39,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:39,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:39,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:39,802 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 16:26:39,803 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 [2022-11-16 16:26:39,844 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:26:39,844 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 76 treesize of output 70 [2022-11-16 16:26:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:40,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:40,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1532727542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:40,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:40,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:40,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872441844] [2022-11-16 16:26:40,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:40,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:40,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:40,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:40,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:40,090 INFO L87 Difference]: Start difference. First operand 3562 states and 15095 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:40,262 INFO L93 Difference]: Finished difference Result 3557 states and 15080 transitions. [2022-11-16 16:26:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:26:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:40,281 INFO L225 Difference]: With dead ends: 3557 [2022-11-16 16:26:40,281 INFO L226 Difference]: Without dead ends: 3557 [2022-11-16 16:26:40,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:40,282 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:40,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-11-16 16:26:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 3557. [2022-11-16 16:26:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3496 states have (on average 4.31350114416476) internal successors, (15080), 3556 states have internal predecessors, (15080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 15080 transitions. [2022-11-16 16:26:40,399 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 15080 transitions. Word has length 8 [2022-11-16 16:26:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:40,400 INFO L495 AbstractCegarLoop]: Abstraction has 3557 states and 15080 transitions. [2022-11-16 16:26:40,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 15080 transitions. [2022-11-16 16:26:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:26:40,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:40,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:40,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:40,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:40,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:40,805 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230263, now seen corresponding path program 1 times [2022-11-16 16:26:40,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:40,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387696381] [2022-11-16 16:26:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:40,806 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 [2022-11-16 16:26:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:40,807 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:40,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 16:26:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 16:26:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:41,123 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 16:26:41,123 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 [2022-11-16 16:26:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:41,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:41,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:41,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387696381] [2022-11-16 16:26:41,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387696381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:41,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:41,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:26:41,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596339381] [2022-11-16 16:26:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:41,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:41,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:41,514 INFO L87 Difference]: Start difference. First operand 3557 states and 15080 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:41,658 INFO L93 Difference]: Finished difference Result 3552 states and 15065 transitions. [2022-11-16 16:26:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:26:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:41,670 INFO L225 Difference]: With dead ends: 3552 [2022-11-16 16:26:41,670 INFO L226 Difference]: Without dead ends: 3552 [2022-11-16 16:26:41,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:41,671 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:41,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2022-11-16 16:26:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3552. [2022-11-16 16:26:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3491 states have (on average 4.315382411916357) internal successors, (15065), 3551 states have internal predecessors, (15065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 15065 transitions. [2022-11-16 16:26:41,758 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 15065 transitions. Word has length 8 [2022-11-16 16:26:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:41,759 INFO L495 AbstractCegarLoop]: Abstraction has 3552 states and 15065 transitions. [2022-11-16 16:26:41,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 15065 transitions. [2022-11-16 16:26:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:26:41,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:41,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:41,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:41,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:41,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1855292612, now seen corresponding path program 1 times [2022-11-16 16:26:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158370868] [2022-11-16 16:26:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:41,961 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 [2022-11-16 16:26:41,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:41,962 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:41,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 16:26:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:26:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:42,415 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:26:42,415 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:26:42,434 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 [2022-11-16 16:26:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:43,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158370868] [2022-11-16 16:26:43,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158370868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907998066] [2022-11-16 16:26:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:43,040 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:43,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:43,041 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:43,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-16 16:26:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:43,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:43,669 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:26:43,669 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 [2022-11-16 16:26:43,701 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 152 treesize of output 144 [2022-11-16 16:26:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:43,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:43,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907998066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:43,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:43,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:43,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38561552] [2022-11-16 16:26:43,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:43,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:43,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:43,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:43,873 INFO L87 Difference]: Start difference. First operand 3552 states and 15065 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:44,020 INFO L93 Difference]: Finished difference Result 3550 states and 15059 transitions. [2022-11-16 16:26:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:26:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:44,033 INFO L225 Difference]: With dead ends: 3550 [2022-11-16 16:26:44,033 INFO L226 Difference]: Without dead ends: 3550 [2022-11-16 16:26:44,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:44,034 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:44,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-11-16 16:26:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3550. [2022-11-16 16:26:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3489 states have (on average 4.3161364287761534) internal successors, (15059), 3549 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 15059 transitions. [2022-11-16 16:26:44,122 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 15059 transitions. Word has length 8 [2022-11-16 16:26:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:44,123 INFO L495 AbstractCegarLoop]: Abstraction has 3550 states and 15059 transitions. [2022-11-16 16:26:44,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 15059 transitions. [2022-11-16 16:26:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:26:44,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:44,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:44,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:44,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:44,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:44,526 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1861830140, now seen corresponding path program 1 times [2022-11-16 16:26:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:44,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687829348] [2022-11-16 16:26:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:44,527 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 [2022-11-16 16:26:44,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:44,528 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:44,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 16:26:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:26:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:44,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:44,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:44,946 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:26:44,946 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 [2022-11-16 16:26:44,964 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 [2022-11-16 16:26:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:45,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:45,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687829348] [2022-11-16 16:26:45,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687829348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651439150] [2022-11-16 16:26:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:45,536 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:45,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:45,537 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:45,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-16 16:26:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:45,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:45,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:45,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:45,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:46,114 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:26:46,114 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 [2022-11-16 16:26:46,141 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 250 treesize of output 242 [2022-11-16 16:26:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:46,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:46,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651439150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:46,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:46,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819361987] [2022-11-16 16:26:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:46,306 INFO L87 Difference]: Start difference. First operand 3550 states and 15059 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:46,443 INFO L93 Difference]: Finished difference Result 3548 states and 15053 transitions. [2022-11-16 16:26:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:26:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:46,454 INFO L225 Difference]: With dead ends: 3548 [2022-11-16 16:26:46,454 INFO L226 Difference]: Without dead ends: 3548 [2022-11-16 16:26:46,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:46,455 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:46,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-11-16 16:26:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3548. [2022-11-16 16:26:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3487 states have (on average 4.316891310582163) internal successors, (15053), 3547 states have internal predecessors, (15053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 15053 transitions. [2022-11-16 16:26:46,531 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 15053 transitions. Word has length 8 [2022-11-16 16:26:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:46,531 INFO L495 AbstractCegarLoop]: Abstraction has 3548 states and 15053 transitions. [2022-11-16 16:26:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 15053 transitions. [2022-11-16 16:26:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:46,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:46,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:46,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 16:26:46,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-16 16:26:46,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:46,932 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1677570276, now seen corresponding path program 1 times [2022-11-16 16:26:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:46,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689360151] [2022-11-16 16:26:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:46,933 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 [2022-11-16 16:26:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:46,935 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:46,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:26:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:26:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:47,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:47,315 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:26:47,315 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 [2022-11-16 16:26:47,333 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 [2022-11-16 16:26:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:47,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:47,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689360151] [2022-11-16 16:26:47,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689360151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032825589] [2022-11-16 16:26:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:47,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:47,942 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:47,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-16 16:26:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:48,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:48,529 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:26:48,530 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 [2022-11-16 16:26:48,556 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 120 treesize of output 116 [2022-11-16 16:26:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:48,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:48,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032825589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:48,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:48,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909397149] [2022-11-16 16:26:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:48,712 INFO L87 Difference]: Start difference. First operand 3548 states and 15053 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) [2022-11-16 16:26:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:48,836 INFO L93 Difference]: Finished difference Result 3546 states and 15047 transitions. [2022-11-16 16:26:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:48,836 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 [2022-11-16 16:26:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:48,848 INFO L225 Difference]: With dead ends: 3546 [2022-11-16 16:26:48,848 INFO L226 Difference]: Without dead ends: 3546 [2022-11-16 16:26:48,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:48,848 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:48,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2022-11-16 16:26:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3546. [2022-11-16 16:26:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3485 states have (on average 4.317647058823529) internal successors, (15047), 3545 states have internal predecessors, (15047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 15047 transitions. [2022-11-16 16:26:48,915 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 15047 transitions. Word has length 9 [2022-11-16 16:26:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:48,915 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 15047 transitions. [2022-11-16 16:26:48,915 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) [2022-11-16 16:26:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 15047 transitions. [2022-11-16 16:26:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:48,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:48,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:48,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:49,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:49,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:49,316 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1677563447, now seen corresponding path program 1 times [2022-11-16 16:26:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:49,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098727994] [2022-11-16 16:26:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:49,317 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 [2022-11-16 16:26:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:49,318 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:49,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 16:26:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:26:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:49,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:49,750 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 16:26:49,751 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 [2022-11-16 16:26:49,781 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 16:26:49,782 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 [2022-11-16 16:26:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:50,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:50,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098727994] [2022-11-16 16:26:50,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098727994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1483415273] [2022-11-16 16:26:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:50,810 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:50,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-16 16:26:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:51,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 16:26:51,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:51,373 INFO L321 Elim1Store]: treesize reduction 95, result has 27.5 percent of original size [2022-11-16 16:26:51,374 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 3 case distinctions, treesize of input 18 treesize of output 46 [2022-11-16 16:26:51,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 16:26:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:26:51,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:51,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1483415273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:51,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:51,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:26:51,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471173723] [2022-11-16 16:26:51,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:26:51,639 INFO L87 Difference]: Start difference. First operand 3546 states and 15047 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) [2022-11-16 16:26:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:51,772 INFO L93 Difference]: Finished difference Result 3545 states and 15046 transitions. [2022-11-16 16:26:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:51,777 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 [2022-11-16 16:26:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:51,787 INFO L225 Difference]: With dead ends: 3545 [2022-11-16 16:26:51,788 INFO L226 Difference]: Without dead ends: 3545 [2022-11-16 16:26:51,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:26:51,789 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:51,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2022-11-16 16:26:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3545. [2022-11-16 16:26:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3485 states have (on average 4.317360114777618) internal successors, (15046), 3544 states have internal predecessors, (15046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 15046 transitions. [2022-11-16 16:26:51,855 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 15046 transitions. Word has length 9 [2022-11-16 16:26:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:51,855 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 15046 transitions. [2022-11-16 16:26:51,855 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) [2022-11-16 16:26:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 15046 transitions. [2022-11-16 16:26:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:51,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:51,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:51,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-16 16:26:52,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:52,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:52,260 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1677563448, now seen corresponding path program 1 times [2022-11-16 16:26:52,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:52,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346462792] [2022-11-16 16:26:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:52,260 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 [2022-11-16 16:26:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:52,261 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:52,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 16:26:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:26:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:52,589 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 16:26:52,589 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 66 [2022-11-16 16:26:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:26:52,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:52,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346462792] [2022-11-16 16:26:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346462792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:52,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:52,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:26:52,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115235380] [2022-11-16 16:26:52,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:52,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:52,768 INFO L87 Difference]: Start difference. First operand 3545 states and 15046 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) [2022-11-16 16:26:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:52,897 INFO L93 Difference]: Finished difference Result 3544 states and 15045 transitions. [2022-11-16 16:26:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:52,898 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 [2022-11-16 16:26:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:52,909 INFO L225 Difference]: With dead ends: 3544 [2022-11-16 16:26:52,909 INFO L226 Difference]: Without dead ends: 3544 [2022-11-16 16:26:52,909 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 [2022-11-16 16:26:52,910 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:52,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-11-16 16:26:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3544. [2022-11-16 16:26:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3485 states have (on average 4.317073170731708) internal successors, (15045), 3543 states have internal predecessors, (15045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 15045 transitions. [2022-11-16 16:26:52,998 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 15045 transitions. Word has length 9 [2022-11-16 16:26:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:52,998 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 15045 transitions. [2022-11-16 16:26:52,998 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) [2022-11-16 16:26:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 15045 transitions. [2022-11-16 16:26:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:52,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:52,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:53,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-16 16:26:53,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:53,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1679490199, now seen corresponding path program 1 times [2022-11-16 16:26:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:53,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618609961] [2022-11-16 16:26:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:53,199 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 [2022-11-16 16:26:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:53,200 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:53,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 16:26:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:26:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:53,610 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:26:53,610 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 [2022-11-16 16:26:53,629 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 [2022-11-16 16:26:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:53,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:54,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:54,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618609961] [2022-11-16 16:26:54,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618609961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:54,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1428337043] [2022-11-16 16:26:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:54,210 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:54,211 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:54,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-16 16:26:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:26:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:54,819 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:26:54,820 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 [2022-11-16 16:26:54,847 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 120 treesize of output 116 [2022-11-16 16:26:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:55,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:55,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1428337043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:55,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:55,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:55,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315121034] [2022-11-16 16:26:55,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:55,043 INFO L87 Difference]: Start difference. First operand 3544 states and 15045 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) [2022-11-16 16:26:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:55,178 INFO L93 Difference]: Finished difference Result 3542 states and 15039 transitions. [2022-11-16 16:26:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:55,179 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 [2022-11-16 16:26:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:55,190 INFO L225 Difference]: With dead ends: 3542 [2022-11-16 16:26:55,191 INFO L226 Difference]: Without dead ends: 3542 [2022-11-16 16:26:55,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:55,191 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:55,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:55,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2022-11-16 16:26:55,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3542. [2022-11-16 16:26:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 3483 states have (on average 4.317829457364341) internal successors, (15039), 3541 states have internal predecessors, (15039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 15039 transitions. [2022-11-16 16:26:55,270 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 15039 transitions. Word has length 9 [2022-11-16 16:26:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:55,271 INFO L495 AbstractCegarLoop]: Abstraction has 3542 states and 15039 transitions. [2022-11-16 16:26:55,271 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) [2022-11-16 16:26:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 15039 transitions. [2022-11-16 16:26:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:55,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:55,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:55,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-16 16:26:55,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-16 16:26:55,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:55,674 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1882362448, now seen corresponding path program 1 times [2022-11-16 16:26:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:55,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489764705] [2022-11-16 16:26:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:55,675 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 [2022-11-16 16:26:55,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:55,676 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:55,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 16:26:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:26:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:56,103 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:26:56,104 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 [2022-11-16 16:26:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:56,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:56,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489764705] [2022-11-16 16:26:56,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489764705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:56,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914414889] [2022-11-16 16:26:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:56,587 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:56,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-16 16:26:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:26:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:57,151 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:26:57,151 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 [2022-11-16 16:26:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:57,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:57,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914414889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:57,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:26:57,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:26:57,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640755447] [2022-11-16 16:26:57,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:57,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:57,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:57,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:57,281 INFO L87 Difference]: Start difference. First operand 3542 states and 15039 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) [2022-11-16 16:26:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:57,394 INFO L93 Difference]: Finished difference Result 3542 states and 15045 transitions. [2022-11-16 16:26:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:57,394 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 [2022-11-16 16:26:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:57,410 INFO L225 Difference]: With dead ends: 3542 [2022-11-16 16:26:57,410 INFO L226 Difference]: Without dead ends: 3542 [2022-11-16 16:26:57,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:26:57,411 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:57,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 16:26:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2022-11-16 16:26:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3542. [2022-11-16 16:26:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 3483 states have (on average 4.319552110249784) internal successors, (15045), 3541 states have internal predecessors, (15045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 15045 transitions. [2022-11-16 16:26:57,489 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 15045 transitions. Word has length 9 [2022-11-16 16:26:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:57,489 INFO L495 AbstractCegarLoop]: Abstraction has 3542 states and 15045 transitions. [2022-11-16 16:26:57,489 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) [2022-11-16 16:26:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 15045 transitions. [2022-11-16 16:26:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:57,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:57,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:57,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-16 16:26:57,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-16 16:26:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:57,898 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1882362449, now seen corresponding path program 1 times [2022-11-16 16:26:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:57,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119373263] [2022-11-16 16:26:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:57,899 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 [2022-11-16 16:26:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:57,900 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:57,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:26:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 16:26:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:58,230 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-16 16:26:58,231 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 [2022-11-16 16:26:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:26:58,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:26:58,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119373263] [2022-11-16 16:26:58,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119373263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:26:58,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:26:58,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:26:58,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626792768] [2022-11-16 16:26:58,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:26:58,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:26:58,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:26:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:26:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:26:58,266 INFO L87 Difference]: Start difference. First operand 3542 states and 15045 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) [2022-11-16 16:26:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:26:58,434 INFO L93 Difference]: Finished difference Result 3280 states and 13940 transitions. [2022-11-16 16:26:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:26:58,434 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 [2022-11-16 16:26:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:26:58,443 INFO L225 Difference]: With dead ends: 3280 [2022-11-16 16:26:58,443 INFO L226 Difference]: Without dead ends: 3280 [2022-11-16 16:26:58,444 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 [2022-11-16 16:26:58,444 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:26:58,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:26:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-11-16 16:26:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2022-11-16 16:26:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3230 states have (on average 4.315789473684211) internal successors, (13940), 3279 states have internal predecessors, (13940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:26:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 13940 transitions. [2022-11-16 16:26:58,508 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 13940 transitions. Word has length 9 [2022-11-16 16:26:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:26:58,509 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 13940 transitions. [2022-11-16 16:26:58,509 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) [2022-11-16 16:26:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 13940 transitions. [2022-11-16 16:26:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:26:58,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:26:58,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:26:58,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 16:26:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:26:58,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:26:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:26:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1882157783, now seen corresponding path program 1 times [2022-11-16 16:26:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:26:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458042714] [2022-11-16 16:26:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:58,711 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 [2022-11-16 16:26:58,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:26:58,711 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:26:58,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 16:26:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:26:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:26:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:26:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:26:59,092 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:26:59,093 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 [2022-11-16 16:26:59,110 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 [2022-11-16 16:26:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:59,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:26:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:26:59,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:26:59,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458042714] [2022-11-16 16:26:59,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458042714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:26:59,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1969763312] [2022-11-16 16:26:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:26:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:26:59,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:26:59,667 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:26:59,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-16 16:27:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:00,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:00,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:00,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:00,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:00,272 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:00,272 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 [2022-11-16 16:27:00,297 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 130 treesize of output 126 [2022-11-16 16:27:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:00,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:00,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1969763312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:00,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:00,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087254755] [2022-11-16 16:27:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:00,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:00,470 INFO L87 Difference]: Start difference. First operand 3280 states and 13940 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) [2022-11-16 16:27:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:00,595 INFO L93 Difference]: Finished difference Result 3282 states and 13950 transitions. [2022-11-16 16:27:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:00,596 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 [2022-11-16 16:27:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:00,608 INFO L225 Difference]: With dead ends: 3282 [2022-11-16 16:27:00,608 INFO L226 Difference]: Without dead ends: 3282 [2022-11-16 16:27:00,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:00,609 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:00,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-11-16 16:27:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3282. [2022-11-16 16:27:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3232 states have (on average 4.316212871287129) internal successors, (13950), 3281 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 13950 transitions. [2022-11-16 16:27:00,693 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 13950 transitions. Word has length 9 [2022-11-16 16:27:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:00,694 INFO L495 AbstractCegarLoop]: Abstraction has 3282 states and 13950 transitions. [2022-11-16 16:27:00,694 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) [2022-11-16 16:27:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 13950 transitions. [2022-11-16 16:27:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:27:00,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:00,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:00,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:00,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:01,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:01,106 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1882157661, now seen corresponding path program 1 times [2022-11-16 16:27:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:01,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076829166] [2022-11-16 16:27:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:01,107 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 [2022-11-16 16:27:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:01,108 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:01,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:27:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:01,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:01,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:01,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:01,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076829166] [2022-11-16 16:27:01,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076829166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:01,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:01,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:27:01,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683307678] [2022-11-16 16:27:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:01,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:27:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:27:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:01,348 INFO L87 Difference]: Start difference. First operand 3282 states and 13950 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) [2022-11-16 16:27:01,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:01,791 INFO L93 Difference]: Finished difference Result 4658 states and 19779 transitions. [2022-11-16 16:27:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:27:01,792 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 [2022-11-16 16:27:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:01,811 INFO L225 Difference]: With dead ends: 4658 [2022-11-16 16:27:01,811 INFO L226 Difference]: Without dead ends: 4658 [2022-11-16 16:27:01,811 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 [2022-11-16 16:27:01,812 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 148 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:01,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 5 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:27:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2022-11-16 16:27:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 3921. [2022-11-16 16:27:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3871 states have (on average 4.478687677602687) internal successors, (17337), 3920 states have internal predecessors, (17337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 17337 transitions. [2022-11-16 16:27:01,894 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 17337 transitions. Word has length 9 [2022-11-16 16:27:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:01,895 INFO L495 AbstractCegarLoop]: Abstraction has 3921 states and 17337 transitions. [2022-11-16 16:27:01,895 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) [2022-11-16 16:27:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 17337 transitions. [2022-11-16 16:27:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:01,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:01,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:01,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 16:27:02,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:02,096 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash 465218994, now seen corresponding path program 1 times [2022-11-16 16:27:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:02,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98253127] [2022-11-16 16:27:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:02,097 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 [2022-11-16 16:27:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:02,097 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:02,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 16:27:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:27:02,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:02,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:02,562 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:27:02,562 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:27:02,584 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 510 treesize of output 494 [2022-11-16 16:27:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:02,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:03,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:03,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98253127] [2022-11-16 16:27:03,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98253127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:03,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205267892] [2022-11-16 16:27:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:03,168 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:03,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:03,168 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:03,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-16 16:27:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:03,852 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:03,853 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 [2022-11-16 16:27:03,877 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 120 treesize of output 116 [2022-11-16 16:27:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:04,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:04,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205267892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:04,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:04,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922783446] [2022-11-16 16:27:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:04,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:04,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:04,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:04,066 INFO L87 Difference]: Start difference. First operand 3921 states and 17337 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:04,181 INFO L93 Difference]: Finished difference Result 3916 states and 17317 transitions. [2022-11-16 16:27:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 10 [2022-11-16 16:27:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:04,194 INFO L225 Difference]: With dead ends: 3916 [2022-11-16 16:27:04,194 INFO L226 Difference]: Without dead ends: 3916 [2022-11-16 16:27:04,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:04,194 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:04,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2022-11-16 16:27:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3916. [2022-11-16 16:27:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3866 states have (on average 4.479306777030523) internal successors, (17317), 3915 states have internal predecessors, (17317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 17317 transitions. [2022-11-16 16:27:04,275 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 17317 transitions. Word has length 10 [2022-11-16 16:27:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:04,275 INFO L495 AbstractCegarLoop]: Abstraction has 3916 states and 17317 transitions. [2022-11-16 16:27:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 17317 transitions. [2022-11-16 16:27:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:04,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:04,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:04,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:04,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:04,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:04,678 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 465065079, now seen corresponding path program 1 times [2022-11-16 16:27:04,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486233088] [2022-11-16 16:27:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:04,679 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 [2022-11-16 16:27:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:04,680 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:04,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:27:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:27:04,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:04,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:05,113 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:27:05,113 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:27:05,132 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 130 treesize of output 126 [2022-11-16 16:27:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:05,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:05,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486233088] [2022-11-16 16:27:05,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486233088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476732207] [2022-11-16 16:27:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:05,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:05,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:05,735 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:05,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-16 16:27:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:06,350 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:06,351 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 [2022-11-16 16:27:06,374 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 130 treesize of output 126 [2022-11-16 16:27:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:06,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:06,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [476732207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:06,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:06,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:06,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827337357] [2022-11-16 16:27:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:06,582 INFO L87 Difference]: Start difference. First operand 3916 states and 17317 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:06,713 INFO L93 Difference]: Finished difference Result 3914 states and 17311 transitions. [2022-11-16 16:27:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 10 [2022-11-16 16:27:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:06,740 INFO L225 Difference]: With dead ends: 3914 [2022-11-16 16:27:06,740 INFO L226 Difference]: Without dead ends: 3914 [2022-11-16 16:27:06,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:06,741 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:06,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-16 16:27:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3914. [2022-11-16 16:27:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3864 states have (on average 4.480072463768116) internal successors, (17311), 3913 states have internal predecessors, (17311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 17311 transitions. [2022-11-16 16:27:06,853 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 17311 transitions. Word has length 10 [2022-11-16 16:27:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:06,853 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 17311 transitions. [2022-11-16 16:27:06,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 17311 transitions. [2022-11-16 16:27:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:06,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:06,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:06,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:07,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 16:27:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:07,259 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash 524791573, now seen corresponding path program 1 times [2022-11-16 16:27:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:07,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58194349] [2022-11-16 16:27:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:07,260 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 [2022-11-16 16:27:07,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:07,261 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:07,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 16:27:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:07,752 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:07,753 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 [2022-11-16 16:27:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:07,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:08,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58194349] [2022-11-16 16:27:08,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58194349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [582888755] [2022-11-16 16:27:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:08,269 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:08,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:08,272 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:08,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-16 16:27:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:08,925 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:27:08,926 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 [2022-11-16 16:27:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:09,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [582888755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:09,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:09,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429665192] [2022-11-16 16:27:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:09,066 INFO L87 Difference]: Start difference. First operand 3914 states and 17311 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:09,184 INFO L93 Difference]: Finished difference Result 3914 states and 17315 transitions. [2022-11-16 16:27:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 10 [2022-11-16 16:27:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:09,197 INFO L225 Difference]: With dead ends: 3914 [2022-11-16 16:27:09,198 INFO L226 Difference]: Without dead ends: 3914 [2022-11-16 16:27:09,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:09,198 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:09,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2022-11-16 16:27:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3914. [2022-11-16 16:27:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3864 states have (on average 4.4811076604554865) internal successors, (17315), 3913 states have internal predecessors, (17315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 17315 transitions. [2022-11-16 16:27:09,280 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 17315 transitions. Word has length 10 [2022-11-16 16:27:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:09,281 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 17315 transitions. [2022-11-16 16:27:09,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 17315 transitions. [2022-11-16 16:27:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:09,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:09,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:09,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-16 16:27:09,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:09,683 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 524586908, now seen corresponding path program 1 times [2022-11-16 16:27:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:09,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831426971] [2022-11-16 16:27:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:09,683 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 [2022-11-16 16:27:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:09,684 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:09,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 16:27:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:27:09,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:10,162 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:27:10,162 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:27:10,183 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 [2022-11-16 16:27:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:10,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:10,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831426971] [2022-11-16 16:27:10,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831426971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76490098] [2022-11-16 16:27:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:10,866 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:10,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:10,867 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:10,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-16 16:27:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:11,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:11,547 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:11,547 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 [2022-11-16 16:27:11,571 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 152 treesize of output 144 [2022-11-16 16:27:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:11,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:11,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [76490098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:11,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:11,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121376951] [2022-11-16 16:27:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:11,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:11,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:11,737 INFO L87 Difference]: Start difference. First operand 3914 states and 17315 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:11,862 INFO L93 Difference]: Finished difference Result 3912 states and 17307 transitions. [2022-11-16 16:27:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 10 [2022-11-16 16:27:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:11,916 INFO L225 Difference]: With dead ends: 3912 [2022-11-16 16:27:11,916 INFO L226 Difference]: Without dead ends: 3912 [2022-11-16 16:27:11,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:11,917 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:11,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2022-11-16 16:27:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 3912. [2022-11-16 16:27:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3862 states have (on average 4.481356809943034) internal successors, (17307), 3911 states have internal predecessors, (17307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 17307 transitions. [2022-11-16 16:27:11,988 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 17307 transitions. Word has length 10 [2022-11-16 16:27:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:11,988 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 17307 transitions. [2022-11-16 16:27:11,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 17307 transitions. [2022-11-16 16:27:11,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:11,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:11,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:11,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 16:27:12,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:12,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:12,389 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1776312271, now seen corresponding path program 1 times [2022-11-16 16:27:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:12,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194534091] [2022-11-16 16:27:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:12,391 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 [2022-11-16 16:27:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:12,392 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:12,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 16:27:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:12,860 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:12,861 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 [2022-11-16 16:27:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:13,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:13,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194534091] [2022-11-16 16:27:13,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194534091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698607669] [2022-11-16 16:27:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:13,365 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:13,370 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:13,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-16 16:27:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:14,028 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:27:14,029 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 [2022-11-16 16:27:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:14,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:14,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1698607669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:14,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:14,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644372999] [2022-11-16 16:27:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:14,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:14,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:14,160 INFO L87 Difference]: Start difference. First operand 3912 states and 17307 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:14,276 INFO L93 Difference]: Finished difference Result 3912 states and 17311 transitions. [2022-11-16 16:27:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 10 [2022-11-16 16:27:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:14,289 INFO L225 Difference]: With dead ends: 3912 [2022-11-16 16:27:14,289 INFO L226 Difference]: Without dead ends: 3912 [2022-11-16 16:27:14,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:14,289 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:14,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2022-11-16 16:27:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 3912. [2022-11-16 16:27:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3862 states have (on average 4.482392542723977) internal successors, (17311), 3911 states have internal predecessors, (17311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 17311 transitions. [2022-11-16 16:27:14,371 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 17311 transitions. Word has length 10 [2022-11-16 16:27:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:14,372 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 17311 transitions. [2022-11-16 16:27:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 17311 transitions. [2022-11-16 16:27:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:14,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:14,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:14,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 16:27:14,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-16 16:27:14,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:14,773 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1776311913, now seen corresponding path program 1 times [2022-11-16 16:27:14,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:14,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669162505] [2022-11-16 16:27:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:14,774 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 [2022-11-16 16:27:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:14,775 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 16:27:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:27:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:15,291 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 [2022-11-16 16:27:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:15,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669162505] [2022-11-16 16:27:15,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669162505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:15,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090078770] [2022-11-16 16:27:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:15,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:15,363 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:15,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-16 16:27:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:27:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:15,962 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:15,962 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 [2022-11-16 16:27:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:16,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:16,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090078770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379802899] [2022-11-16 16:27:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:16,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:16,554 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:16,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-16 16:27:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:16,992 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:16,992 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 [2022-11-16 16:27:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:17,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:17,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379802899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:17,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:27:17,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 17 [2022-11-16 16:27:17,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114899633] [2022-11-16 16:27:17,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:17,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:27:17,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:17,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:27:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:27:17,962 INFO L87 Difference]: Start difference. First operand 3912 states and 17311 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:18,087 INFO L93 Difference]: Finished difference Result 3912 states and 17309 transitions. [2022-11-16 16:27:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:27:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:27:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:18,100 INFO L225 Difference]: With dead ends: 3912 [2022-11-16 16:27:18,100 INFO L226 Difference]: Without dead ends: 3912 [2022-11-16 16:27:18,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:27:18,101 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:18,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-11-16 16:27:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2022-11-16 16:27:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 3912. [2022-11-16 16:27:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3862 states have (on average 4.481874676333506) internal successors, (17309), 3911 states have internal predecessors, (17309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 17309 transitions. [2022-11-16 16:27:18,185 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 17309 transitions. Word has length 10 [2022-11-16 16:27:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:18,185 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 17309 transitions. [2022-11-16 16:27:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 17309 transitions. [2022-11-16 16:27:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:18,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:18,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:18,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:18,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:18,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:18,790 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1782650937, now seen corresponding path program 1 times [2022-11-16 16:27:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:18,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893860210] [2022-11-16 16:27:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:18,791 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 [2022-11-16 16:27:18,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:18,792 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:18,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 16:27:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:19,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:19,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:19,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:19,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893860210] [2022-11-16 16:27:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893860210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:19,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:19,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179598366] [2022-11-16 16:27:19,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:19,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:27:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:27:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:19,063 INFO L87 Difference]: Start difference. First operand 3912 states and 17309 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-16 16:27:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:19,361 INFO L93 Difference]: Finished difference Result 3912 states and 16670 transitions. [2022-11-16 16:27:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:27:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 10 [2022-11-16 16:27:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:19,372 INFO L225 Difference]: With dead ends: 3912 [2022-11-16 16:27:19,372 INFO L226 Difference]: Without dead ends: 3912 [2022-11-16 16:27:19,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:19,373 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 62 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:19,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 3 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 16:27:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2022-11-16 16:27:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 3912. [2022-11-16 16:27:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3862 states have (on average 4.316416364577939) internal successors, (16670), 3911 states have internal predecessors, (16670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16670 transitions. [2022-11-16 16:27:19,456 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16670 transitions. Word has length 10 [2022-11-16 16:27:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:19,456 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 16670 transitions. [2022-11-16 16:27:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-16 16:27:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16670 transitions. [2022-11-16 16:27:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:19,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:19,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:19,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:19,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:19,658 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1782650875, now seen corresponding path program 1 times [2022-11-16 16:27:19,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:19,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891547759] [2022-11-16 16:27:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:19,659 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:19,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 16:27:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:27:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:19,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:20,124 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:27:20,125 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 [2022-11-16 16:27:20,142 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 [2022-11-16 16:27:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:20,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:20,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891547759] [2022-11-16 16:27:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891547759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [365683683] [2022-11-16 16:27:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:20,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:20,726 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:20,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-16 16:27:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:21,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:21,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:21,408 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:21,408 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 [2022-11-16 16:27:21,430 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 250 treesize of output 242 [2022-11-16 16:27:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:21,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:21,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [365683683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:21,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:21,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:21,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680515941] [2022-11-16 16:27:21,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:21,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:21,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:21,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:21,608 INFO L87 Difference]: Start difference. First operand 3912 states and 16670 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:21,725 INFO L93 Difference]: Finished difference Result 3910 states and 16660 transitions. [2022-11-16 16:27:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:21,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 10 [2022-11-16 16:27:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:21,737 INFO L225 Difference]: With dead ends: 3910 [2022-11-16 16:27:21,737 INFO L226 Difference]: Without dead ends: 3910 [2022-11-16 16:27:21,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:21,738 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:21,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-11-16 16:27:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3910. [2022-11-16 16:27:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3860 states have (on average 4.316062176165803) internal successors, (16660), 3909 states have internal predecessors, (16660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16660 transitions. [2022-11-16 16:27:21,811 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16660 transitions. Word has length 10 [2022-11-16 16:27:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:21,811 INFO L495 AbstractCegarLoop]: Abstraction has 3910 states and 16660 transitions. [2022-11-16 16:27:21,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:27:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16660 transitions. [2022-11-16 16:27:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:27:21,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:21,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:21,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-16 16:27:22,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-16 16:27:22,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:22,214 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1782650997, now seen corresponding path program 1 times [2022-11-16 16:27:22,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:22,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865331123] [2022-11-16 16:27:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:22,215 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 [2022-11-16 16:27:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:22,216 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:22,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 16:27:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:27:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:22,652 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:22,652 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 [2022-11-16 16:27:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:22,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:23,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:23,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865331123] [2022-11-16 16:27:23,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865331123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1915501496] [2022-11-16 16:27:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:23,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:23,267 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:23,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-16 16:27:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:27:23,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:23,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:24,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1915501496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693005284] [2022-11-16 16:27:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:24,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:24,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:24,132 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:24,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-16 16:27:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 16:27:24,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:24,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:24,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693005284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:24,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:27:24,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 21 [2022-11-16 16:27:24,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510008880] [2022-11-16 16:27:24,677 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:27:24,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 16:27:24,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:24,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 16:27:24,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:27:24,678 INFO L87 Difference]: Start difference. First operand 3910 states and 16660 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:29,967 INFO L93 Difference]: Finished difference Result 6000 states and 25915 transitions. [2022-11-16 16:27:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 16:27:29,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:27:29,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:29,991 INFO L225 Difference]: With dead ends: 6000 [2022-11-16 16:27:29,991 INFO L226 Difference]: Without dead ends: 6000 [2022-11-16 16:27:29,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:27:29,992 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1032 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:29,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 40 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-16 16:27:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2022-11-16 16:27:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 5402. [2022-11-16 16:27:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5352 states have (on average 4.4953288490284) internal successors, (24059), 5401 states have internal predecessors, (24059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 24059 transitions. [2022-11-16 16:27:30,135 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 24059 transitions. Word has length 10 [2022-11-16 16:27:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:30,135 INFO L495 AbstractCegarLoop]: Abstraction has 5402 states and 24059 transitions. [2022-11-16 16:27:30,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 24059 transitions. [2022-11-16 16:27:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:30,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:30,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:30,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-16 16:27:30,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-16 16:27:30,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:30,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:30,737 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:30,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:30,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1537028189, now seen corresponding path program 1 times [2022-11-16 16:27:30,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:30,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178652396] [2022-11-16 16:27:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:30,738 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 [2022-11-16 16:27:30,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:30,739 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:30,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 16:27:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:27:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:31,239 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:27:31,239 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:27:31,260 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 84 treesize of output 82 [2022-11-16 16:27:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:31,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:32,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:32,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178652396] [2022-11-16 16:27:32,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178652396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:32,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31131240] [2022-11-16 16:27:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:32,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:32,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:32,138 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:32,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-16 16:27:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:32,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:32,862 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:32,862 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 [2022-11-16 16:27:32,885 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 510 treesize of output 494 [2022-11-16 16:27:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:27:33,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:33,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [31131240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:33,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:33,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:27:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655025384] [2022-11-16 16:27:33,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:33,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:27:33,096 INFO L87 Difference]: Start difference. First operand 5402 states and 24059 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:33,227 INFO L93 Difference]: Finished difference Result 5400 states and 24055 transitions. [2022-11-16 16:27:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:33,244 INFO L225 Difference]: With dead ends: 5400 [2022-11-16 16:27:33,245 INFO L226 Difference]: Without dead ends: 5400 [2022-11-16 16:27:33,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:27:33,245 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:33,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-11-16 16:27:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 5400. [2022-11-16 16:27:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 5350 states have (on average 4.496261682242991) internal successors, (24055), 5399 states have internal predecessors, (24055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 24055 transitions. [2022-11-16 16:27:33,350 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 24055 transitions. Word has length 11 [2022-11-16 16:27:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:33,350 INFO L495 AbstractCegarLoop]: Abstraction has 5400 states and 24055 transitions. [2022-11-16 16:27:33,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 24055 transitions. [2022-11-16 16:27:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:33,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:33,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:33,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-11-16 16:27:33,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-16 16:27:33,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:33,754 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1536881001, now seen corresponding path program 1 times [2022-11-16 16:27:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:33,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272486660] [2022-11-16 16:27:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:33,755 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 [2022-11-16 16:27:33,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:33,756 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:33,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 16:27:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:34,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:27:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:34,229 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:27:34,230 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 [2022-11-16 16:27:34,247 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 [2022-11-16 16:27:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:34,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:34,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272486660] [2022-11-16 16:27:34,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272486660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [17395330] [2022-11-16 16:27:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:34,876 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:34,877 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:34,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-16 16:27:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:35,568 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:35,568 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 [2022-11-16 16:27:35,589 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 88 treesize of output 84 [2022-11-16 16:27:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:35,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:35,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [17395330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:35,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:35,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:35,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927716985] [2022-11-16 16:27:35,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:35,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:35,755 INFO L87 Difference]: Start difference. First operand 5400 states and 24055 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:35,878 INFO L93 Difference]: Finished difference Result 5395 states and 24035 transitions. [2022-11-16 16:27:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:35,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:35,894 INFO L225 Difference]: With dead ends: 5395 [2022-11-16 16:27:35,894 INFO L226 Difference]: Without dead ends: 5395 [2022-11-16 16:27:35,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:35,895 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:35,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-11-16 16:27:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5395. [2022-11-16 16:27:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5395 states, 5345 states have (on average 4.496725912067353) internal successors, (24035), 5394 states have internal predecessors, (24035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 24035 transitions. [2022-11-16 16:27:36,000 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 24035 transitions. Word has length 11 [2022-11-16 16:27:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:36,000 INFO L495 AbstractCegarLoop]: Abstraction has 5395 states and 24035 transitions. [2022-11-16 16:27:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 24035 transitions. [2022-11-16 16:27:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:36,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:36,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:36,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-16 16:27:36,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-16 16:27:36,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:36,401 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1532318517, now seen corresponding path program 1 times [2022-11-16 16:27:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:36,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999143720] [2022-11-16 16:27:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:36,402 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 [2022-11-16 16:27:36,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:36,403 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:36,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 16:27:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:36,889 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:36,890 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 [2022-11-16 16:27:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:37,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:37,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:37,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999143720] [2022-11-16 16:27:37,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999143720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:37,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [800078755] [2022-11-16 16:27:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:37,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:37,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:37,402 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-16 16:27:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:37,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:38,107 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:27:38,107 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 [2022-11-16 16:27:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:38,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:38,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [800078755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:38,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:38,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834147121] [2022-11-16 16:27:38,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:38,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:38,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:38,254 INFO L87 Difference]: Start difference. First operand 5395 states and 24035 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:38,399 INFO L93 Difference]: Finished difference Result 5395 states and 24039 transitions. [2022-11-16 16:27:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:38,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:38,419 INFO L225 Difference]: With dead ends: 5395 [2022-11-16 16:27:38,419 INFO L226 Difference]: Without dead ends: 5395 [2022-11-16 16:27:38,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:38,420 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:38,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-11-16 16:27:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5395. [2022-11-16 16:27:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5395 states, 5345 states have (on average 4.497474275023387) internal successors, (24039), 5394 states have internal predecessors, (24039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 24039 transitions. [2022-11-16 16:27:38,528 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 24039 transitions. Word has length 11 [2022-11-16 16:27:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:38,528 INFO L495 AbstractCegarLoop]: Abstraction has 5395 states and 24039 transitions. [2022-11-16 16:27:38,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 24039 transitions. [2022-11-16 16:27:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:38,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:38,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:38,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-16 16:27:38,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:38,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:38,930 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1532113852, now seen corresponding path program 1 times [2022-11-16 16:27:38,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:38,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281383581] [2022-11-16 16:27:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:38,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:38,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:38,933 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:38,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 16:27:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:39,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:27:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:39,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:39,411 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:27:39,412 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 [2022-11-16 16:27:39,431 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 [2022-11-16 16:27:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:39,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:40,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281383581] [2022-11-16 16:27:40,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281383581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951201613] [2022-11-16 16:27:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:40,070 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:40,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-16 16:27:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:40,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:40,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:40,796 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:40,796 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 [2022-11-16 16:27:40,828 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 88 treesize of output 84 [2022-11-16 16:27:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:41,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:41,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951201613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:41,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:41,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013630133] [2022-11-16 16:27:41,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:41,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:41,025 INFO L87 Difference]: Start difference. First operand 5395 states and 24039 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:41,164 INFO L93 Difference]: Finished difference Result 5393 states and 24033 transitions. [2022-11-16 16:27:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:41,182 INFO L225 Difference]: With dead ends: 5393 [2022-11-16 16:27:41,182 INFO L226 Difference]: Without dead ends: 5393 [2022-11-16 16:27:41,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:41,182 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:41,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2022-11-16 16:27:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 5393. [2022-11-16 16:27:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5343 states have (on average 4.498034811903425) internal successors, (24033), 5392 states have internal predecessors, (24033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 24033 transitions. [2022-11-16 16:27:41,293 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 24033 transitions. Word has length 11 [2022-11-16 16:27:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:41,293 INFO L495 AbstractCegarLoop]: Abstraction has 5393 states and 24033 transitions. [2022-11-16 16:27:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 24033 transitions. [2022-11-16 16:27:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:41,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:41,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:41,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-16 16:27:41,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:41,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:41,695 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -911336436, now seen corresponding path program 1 times [2022-11-16 16:27:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463474574] [2022-11-16 16:27:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:41,696 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 [2022-11-16 16:27:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:41,697 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:41,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 16:27:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:42,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:42,245 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:42,245 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 [2022-11-16 16:27:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:42,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463474574] [2022-11-16 16:27:42,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463474574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523011528] [2022-11-16 16:27:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:42,748 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:42,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-16 16:27:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:43,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:43,469 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:27:43,470 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 [2022-11-16 16:27:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:43,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1523011528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986419693] [2022-11-16 16:27:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:43,651 INFO L87 Difference]: Start difference. First operand 5393 states and 24033 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:43,780 INFO L93 Difference]: Finished difference Result 5393 states and 24037 transitions. [2022-11-16 16:27:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:43,799 INFO L225 Difference]: With dead ends: 5393 [2022-11-16 16:27:43,799 INFO L226 Difference]: Without dead ends: 5393 [2022-11-16 16:27:43,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:43,800 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:43,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2022-11-16 16:27:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 5393. [2022-11-16 16:27:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5343 states have (on average 4.4987834549878345) internal successors, (24037), 5392 states have internal predecessors, (24037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 24037 transitions. [2022-11-16 16:27:43,958 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 24037 transitions. Word has length 11 [2022-11-16 16:27:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:43,959 INFO L495 AbstractCegarLoop]: Abstraction has 5393 states and 24037 transitions. [2022-11-16 16:27:43,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 24037 transitions. [2022-11-16 16:27:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:43,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:43,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:43,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:44,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:44,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:44,376 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash -911336078, now seen corresponding path program 1 times [2022-11-16 16:27:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:44,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561709021] [2022-11-16 16:27:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:44,377 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 [2022-11-16 16:27:44,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:44,378 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:44,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 16:27:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:44,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:44,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:44,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:44,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561709021] [2022-11-16 16:27:44,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561709021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:44,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:44,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:27:44,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413023362] [2022-11-16 16:27:44,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:44,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:27:44,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:27:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:44,707 INFO L87 Difference]: Start difference. First operand 5393 states and 24037 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:45,154 INFO L93 Difference]: Finished difference Result 7937 states and 35542 transitions. [2022-11-16 16:27:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:27:45,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:45,178 INFO L225 Difference]: With dead ends: 7937 [2022-11-16 16:27:45,178 INFO L226 Difference]: Without dead ends: 7937 [2022-11-16 16:27:45,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:45,179 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 135 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:45,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 3 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:27:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7937 states. [2022-11-16 16:27:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7937 to 6628. [2022-11-16 16:27:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6628 states, 6578 states have (on average 4.695500152021891) internal successors, (30887), 6627 states have internal predecessors, (30887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6628 states to 6628 states and 30887 transitions. [2022-11-16 16:27:45,352 INFO L78 Accepts]: Start accepts. Automaton has 6628 states and 30887 transitions. Word has length 11 [2022-11-16 16:27:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:45,353 INFO L495 AbstractCegarLoop]: Abstraction has 6628 states and 30887 transitions. [2022-11-16 16:27:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6628 states and 30887 transitions. [2022-11-16 16:27:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:45,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:45,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:45,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-16 16:27:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:45,558 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash -917675040, now seen corresponding path program 1 times [2022-11-16 16:27:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:45,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831126041] [2022-11-16 16:27:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:45,558 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 [2022-11-16 16:27:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:45,559 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 16:27:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:45,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:27:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:46,080 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:27:46,080 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:27:46,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 144 [2022-11-16 16:27:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:46,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:46,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831126041] [2022-11-16 16:27:46,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831126041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998887535] [2022-11-16 16:27:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:46,734 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:46,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:46,735 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:46,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-16 16:27:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:47,491 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:27:47,492 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 [2022-11-16 16:27:47,515 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 88 treesize of output 84 [2022-11-16 16:27:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:47,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:47,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998887535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:47,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:47,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:47,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192059010] [2022-11-16 16:27:47,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:47,684 INFO L87 Difference]: Start difference. First operand 6628 states and 30887 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:47,828 INFO L93 Difference]: Finished difference Result 6623 states and 30867 transitions. [2022-11-16 16:27:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:47,851 INFO L225 Difference]: With dead ends: 6623 [2022-11-16 16:27:47,851 INFO L226 Difference]: Without dead ends: 6623 [2022-11-16 16:27:47,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:47,852 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:47,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 16:27:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6623 states. [2022-11-16 16:27:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6623 to 6623. [2022-11-16 16:27:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 6573 states have (on average 4.696029210406207) internal successors, (30867), 6622 states have internal predecessors, (30867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 30867 transitions. [2022-11-16 16:27:48,000 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 30867 transitions. Word has length 11 [2022-11-16 16:27:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:48,081 INFO L495 AbstractCegarLoop]: Abstraction has 6623 states and 30867 transitions. [2022-11-16 16:27:48,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 30867 transitions. [2022-11-16 16:27:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:48,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:48,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:48,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:48,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 0 [2022-11-16 16:27:48,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:48,483 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash 769099249, now seen corresponding path program 1 times [2022-11-16 16:27:48,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:48,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609021334] [2022-11-16 16:27:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:48,484 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 [2022-11-16 16:27:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:48,485 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:48,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-16 16:27:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:48,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:27:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:48,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:49,043 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 [2022-11-16 16:27:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:49,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609021334] [2022-11-16 16:27:49,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609021334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418423553] [2022-11-16 16:27:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:49,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:49,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:49,120 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:49,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-16 16:27:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:49,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:27:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:49,811 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:49,811 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 [2022-11-16 16:27:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:50,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:50,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418423553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:50,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842663288] [2022-11-16 16:27:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:50,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:50,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:27:50,412 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:27:50,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-16 16:27:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:50,906 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:50,906 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 [2022-11-16 16:27:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:51,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:51,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842663288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:51,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-16 16:27:51,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 17 [2022-11-16 16:27:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873716008] [2022-11-16 16:27:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:27:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:27:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:27:51,185 INFO L87 Difference]: Start difference. First operand 6623 states and 30867 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:51,311 INFO L93 Difference]: Finished difference Result 6627 states and 30889 transitions. [2022-11-16 16:27:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:27:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:51,331 INFO L225 Difference]: With dead ends: 6627 [2022-11-16 16:27:51,332 INFO L226 Difference]: Without dead ends: 6627 [2022-11-16 16:27:51,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:27:51,332 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:51,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-11-16 16:27:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2022-11-16 16:27:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6625. [2022-11-16 16:27:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 6575 states have (on average 4.696121673003803) internal successors, (30877), 6624 states have internal predecessors, (30877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 30877 transitions. [2022-11-16 16:27:51,463 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 30877 transitions. Word has length 11 [2022-11-16 16:27:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:51,464 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 30877 transitions. [2022-11-16 16:27:51,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 30877 transitions. [2022-11-16 16:27:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:51,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:51,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:51,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2022-11-16 16:27:51,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-16 16:27:51,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-16 16:27:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:27:52,066 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash 769100022, now seen corresponding path program 1 times [2022-11-16 16:27:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078144692] [2022-11-16 16:27:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:52,067 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 [2022-11-16 16:27:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:52,068 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-16 16:27:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 16:27:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:52,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:52,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078144692] [2022-11-16 16:27:52,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078144692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:52,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:52,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:27:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133068123] [2022-11-16 16:27:52,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:52,351 INFO L87 Difference]: Start difference. First operand 6625 states and 30877 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:52,524 INFO L93 Difference]: Finished difference Result 5579 states and 25504 transitions. [2022-11-16 16:27:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:52,541 INFO L225 Difference]: With dead ends: 5579 [2022-11-16 16:27:52,541 INFO L226 Difference]: Without dead ends: 5579 [2022-11-16 16:27:52,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:27:52,541 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:52,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:27:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2022-11-16 16:27:52,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 5579. [2022-11-16 16:27:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5579 states, 5537 states have (on average 4.606104388658118) internal successors, (25504), 5578 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5579 states to 5579 states and 25504 transitions. [2022-11-16 16:27:52,708 INFO L78 Accepts]: Start accepts. Automaton has 5579 states and 25504 transitions. Word has length 11 [2022-11-16 16:27:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:52,708 INFO L495 AbstractCegarLoop]: Abstraction has 5579 states and 25504 transitions. [2022-11-16 16:27:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5579 states and 25504 transitions. [2022-11-16 16:27:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:52,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:52,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:52,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:52,922 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 769100023, now seen corresponding path program 1 times [2022-11-16 16:27:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:52,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75652252] [2022-11-16 16:27:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:52,923 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 [2022-11-16 16:27:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:52,924 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:52,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-16 16:27:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:53,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 16:27:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:53,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:53,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75652252] [2022-11-16 16:27:53,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75652252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:53,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:53,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:27:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320174858] [2022-11-16 16:27:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:53,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:27:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:27:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:53,252 INFO L87 Difference]: Start difference. First operand 5579 states and 25504 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:53,468 INFO L93 Difference]: Finished difference Result 4533 states and 20131 transitions. [2022-11-16 16:27:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:53,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:53,482 INFO L225 Difference]: With dead ends: 4533 [2022-11-16 16:27:53,482 INFO L226 Difference]: Without dead ends: 4533 [2022-11-16 16:27:53,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:53,482 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:53,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:27:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4533 states. [2022-11-16 16:27:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4533 to 4533. [2022-11-16 16:27:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4499 states have (on average 4.474549899977773) internal successors, (20131), 4532 states have internal predecessors, (20131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 20131 transitions. [2022-11-16 16:27:53,578 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 20131 transitions. Word has length 11 [2022-11-16 16:27:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:53,579 INFO L495 AbstractCegarLoop]: Abstraction has 4533 states and 20131 transitions. [2022-11-16 16:27:53,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 20131 transitions. [2022-11-16 16:27:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:53,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:53,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:53,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-16 16:27:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:53,780 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 768892648, now seen corresponding path program 1 times [2022-11-16 16:27:53,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:53,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852096159] [2022-11-16 16:27:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:53,781 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 [2022-11-16 16:27:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:53,782 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:53,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-16 16:27:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:54,314 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:54,315 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 [2022-11-16 16:27:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:27:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:27:54,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852096159] [2022-11-16 16:27:54,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852096159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:27:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1683426843] [2022-11-16 16:27:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:54,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:27:54,814 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:27:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-16 16:27:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:55,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:55,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:27:55,603 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:27:55,603 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 [2022-11-16 16:27:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:55,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:55,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1683426843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:55,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:27:55,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:27:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847781404] [2022-11-16 16:27:55,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:27:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:27:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:55,751 INFO L87 Difference]: Start difference. First operand 4533 states and 20131 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:55,860 INFO L93 Difference]: Finished difference Result 4535 states and 20137 transitions. [2022-11-16 16:27:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:27:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:55,873 INFO L225 Difference]: With dead ends: 4535 [2022-11-16 16:27:55,873 INFO L226 Difference]: Without dead ends: 4535 [2022-11-16 16:27:55,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:55,874 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:55,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-16 16:27:55,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2022-11-16 16:27:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 4535. [2022-11-16 16:27:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4535 states, 4501 states have (on average 4.473894690068874) internal successors, (20137), 4534 states have internal predecessors, (20137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 20137 transitions. [2022-11-16 16:27:55,955 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 20137 transitions. Word has length 11 [2022-11-16 16:27:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:55,955 INFO L495 AbstractCegarLoop]: Abstraction has 4535 states and 20137 transitions. [2022-11-16 16:27:55,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 20137 transitions. [2022-11-16 16:27:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:55,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:55,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:55,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-16 16:27:56,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:27:56,362 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 768910459, now seen corresponding path program 2 times [2022-11-16 16:27:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:56,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094814122] [2022-11-16 16:27:56,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:27:56,363 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 [2022-11-16 16:27:56,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:56,364 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:56,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-16 16:27:56,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:27:56,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:27:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:56,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:56,842 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:27:56,842 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 [2022-11-16 16:27:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:57,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:57,007 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094814122] [2022-11-16 16:27:57,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094814122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:57,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:57,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874844097] [2022-11-16 16:27:57,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:27:57,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:57,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:27:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:27:57,008 INFO L87 Difference]: Start difference. First operand 4535 states and 20137 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:57,126 INFO L93 Difference]: Finished difference Result 4545 states and 20187 transitions. [2022-11-16 16:27:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:27:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:57,139 INFO L225 Difference]: With dead ends: 4545 [2022-11-16 16:27:57,139 INFO L226 Difference]: Without dead ends: 4545 [2022-11-16 16:27:57,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:27:57,140 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:57,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-11-16 16:27:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2022-11-16 16:27:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 4545. [2022-11-16 16:27:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4511 states have (on average 4.4750609620926625) internal successors, (20187), 4544 states have internal predecessors, (20187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 20187 transitions. [2022-11-16 16:27:57,275 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 20187 transitions. Word has length 11 [2022-11-16 16:27:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:57,276 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 20187 transitions. [2022-11-16 16:27:57,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 20187 transitions. [2022-11-16 16:27:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:57,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:57,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:57,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-16 16:27:57,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:57,477 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash 768909605, now seen corresponding path program 1 times [2022-11-16 16:27:57,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:57,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074654649] [2022-11-16 16:27:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:57,478 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 [2022-11-16 16:27:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:57,479 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:57,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-16 16:27:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:27:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:57,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:57,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:57,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074654649] [2022-11-16 16:27:57,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074654649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:57,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:57,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:27:57,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475253931] [2022-11-16 16:27:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:57,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:27:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:27:57,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:57,795 INFO L87 Difference]: Start difference. First operand 4545 states and 20187 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:58,080 INFO L93 Difference]: Finished difference Result 6195 states and 26500 transitions. [2022-11-16 16:27:58,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:27:58,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:58,098 INFO L225 Difference]: With dead ends: 6195 [2022-11-16 16:27:58,098 INFO L226 Difference]: Without dead ends: 6195 [2022-11-16 16:27:58,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:27:58,099 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:58,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:27:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6195 states. [2022-11-16 16:27:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6195 to 5364. [2022-11-16 16:27:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5364 states, 5330 states have (on average 4.450656660412758) internal successors, (23722), 5363 states have internal predecessors, (23722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5364 states to 5364 states and 23722 transitions. [2022-11-16 16:27:58,206 INFO L78 Accepts]: Start accepts. Automaton has 5364 states and 23722 transitions. Word has length 11 [2022-11-16 16:27:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:58,206 INFO L495 AbstractCegarLoop]: Abstraction has 5364 states and 23722 transitions. [2022-11-16 16:27:58,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 5364 states and 23722 transitions. [2022-11-16 16:27:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:58,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:58,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:58,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-16 16:27:58,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:58,419 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash 768903112, now seen corresponding path program 2 times [2022-11-16 16:27:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702825031] [2022-11-16 16:27:58,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:27:58,420 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 [2022-11-16 16:27:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:58,421 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:58,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-16 16:27:58,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 16:27:58,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:27:58,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:27:58,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:27:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:27:58,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:27:58,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:27:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702825031] [2022-11-16 16:27:58,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702825031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:27:58,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:27:58,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:27:58,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140392734] [2022-11-16 16:27:58,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:27:58,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:27:58,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:27:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:27:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:27:58,734 INFO L87 Difference]: Start difference. First operand 5364 states and 23722 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:27:59,209 INFO L93 Difference]: Finished difference Result 6663 states and 28003 transitions. [2022-11-16 16:27:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:27:59,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:27:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:27:59,226 INFO L225 Difference]: With dead ends: 6663 [2022-11-16 16:27:59,226 INFO L226 Difference]: Without dead ends: 6663 [2022-11-16 16:27:59,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:27:59,227 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:27:59,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:27:59,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6663 states. [2022-11-16 16:27:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6663 to 4539. [2022-11-16 16:27:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4505 states have (on average 4.288568257491676) internal successors, (19320), 4538 states have internal predecessors, (19320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 19320 transitions. [2022-11-16 16:27:59,321 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 19320 transitions. Word has length 11 [2022-11-16 16:27:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:27:59,322 INFO L495 AbstractCegarLoop]: Abstraction has 4539 states and 19320 transitions. [2022-11-16 16:27:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:27:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 19320 transitions. [2022-11-16 16:27:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:27:59,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:27:59,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:27:59,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-16 16:27:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:27:59,523 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:27:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:27:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash 768909791, now seen corresponding path program 1 times [2022-11-16 16:27:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:27:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701136330] [2022-11-16 16:27:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:27:59,524 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 [2022-11-16 16:27:59,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:27:59,525 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:27:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-16 16:27:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:27:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:27:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:00,077 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:00,078 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 [2022-11-16 16:28:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:00,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:00,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:00,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701136330] [2022-11-16 16:28:00,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701136330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:00,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1463254108] [2022-11-16 16:28:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:00,578 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:00,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:00,579 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:00,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-16 16:28:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:01,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:01,354 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:01,354 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 [2022-11-16 16:28:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:01,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:01,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1463254108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:01,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:01,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:01,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594444874] [2022-11-16 16:28:01,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:01,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:01,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:01,492 INFO L87 Difference]: Start difference. First operand 4539 states and 19320 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:01,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:01,599 INFO L93 Difference]: Finished difference Result 4537 states and 19308 transitions. [2022-11-16 16:28:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:28:01,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:01,611 INFO L225 Difference]: With dead ends: 4537 [2022-11-16 16:28:01,611 INFO L226 Difference]: Without dead ends: 4537 [2022-11-16 16:28:01,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:01,612 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:01,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2022-11-16 16:28:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 4537. [2022-11-16 16:28:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4503 states have (on average 4.287808127914723) internal successors, (19308), 4536 states have internal predecessors, (19308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 19308 transitions. [2022-11-16 16:28:01,722 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 19308 transitions. Word has length 11 [2022-11-16 16:28:01,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:01,723 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 19308 transitions. [2022-11-16 16:28:01,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 19308 transitions. [2022-11-16 16:28:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:28:01,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:01,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:01,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-16 16:28:01,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-11-16 16:28:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:02,124 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:02,124 INFO L85 PathProgramCache]: Analyzing trace with hash 768909653, now seen corresponding path program 1 times [2022-11-16 16:28:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:02,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24380559] [2022-11-16 16:28:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:02,125 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 [2022-11-16 16:28:02,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:02,126 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:02,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-16 16:28:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:28:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:02,623 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:02,624 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 [2022-11-16 16:28:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:02,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:03,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24380559] [2022-11-16 16:28:03,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24380559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:03,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171669547] [2022-11-16 16:28:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:03,269 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:03,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:03,270 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:03,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-16 16:28:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:03,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:28:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:03,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:04,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171669547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:04,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086641431] [2022-11-16 16:28:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:04,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:28:04,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:28:04,209 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:28:04,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-16 16:28:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:28:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:04,745 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:04,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:28:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:05,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:05,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086641431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:05,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:28:05,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 22 [2022-11-16 16:28:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438410216] [2022-11-16 16:28:05,186 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:28:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 16:28:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 16:28:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-16 16:28:05,187 INFO L87 Difference]: Start difference. First operand 4537 states and 19308 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:09,876 INFO L93 Difference]: Finished difference Result 7017 states and 31597 transitions. [2022-11-16 16:28:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 16:28:09,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:28:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:09,898 INFO L225 Difference]: With dead ends: 7017 [2022-11-16 16:28:09,898 INFO L226 Difference]: Without dead ends: 7017 [2022-11-16 16:28:09,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 16:28:09,899 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 646 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:09,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 5 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 16:28:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2022-11-16 16:28:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 6324. [2022-11-16 16:28:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6290 states have (on average 4.644674085850556) internal successors, (29215), 6323 states have internal predecessors, (29215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 29215 transitions. [2022-11-16 16:28:10,016 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 29215 transitions. Word has length 11 [2022-11-16 16:28:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:10,016 INFO L495 AbstractCegarLoop]: Abstraction has 6324 states and 29215 transitions. [2022-11-16 16:28:10,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 29215 transitions. [2022-11-16 16:28:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:28:10,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:10,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:10,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:10,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:10,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-16 16:28:10,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:10,617 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 572397657, now seen corresponding path program 1 times [2022-11-16 16:28:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931494997] [2022-11-16 16:28:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:10,618 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 [2022-11-16 16:28:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:10,619 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:10,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-16 16:28:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:28:10,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:11,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:11,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:11,172 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:28:11,172 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 [2022-11-16 16:28:11,189 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 [2022-11-16 16:28:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:11,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:11,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931494997] [2022-11-16 16:28:11,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931494997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450701720] [2022-11-16 16:28:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:11,786 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:11,787 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:11,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-16 16:28:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:28:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:12,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:12,609 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:28:12,610 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 [2022-11-16 16:28:12,629 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 130 treesize of output 126 [2022-11-16 16:28:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:28:12,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:12,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450701720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:12,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:12,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489511540] [2022-11-16 16:28:12,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:12,831 INFO L87 Difference]: Start difference. First operand 6324 states and 29215 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:12,962 INFO L93 Difference]: Finished difference Result 6322 states and 29211 transitions. [2022-11-16 16:28:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-16 16:28:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:12,981 INFO L225 Difference]: With dead ends: 6322 [2022-11-16 16:28:12,981 INFO L226 Difference]: Without dead ends: 6322 [2022-11-16 16:28:12,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:12,982 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:12,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6322 states. [2022-11-16 16:28:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6322 to 6322. [2022-11-16 16:28:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6322 states, 6288 states have (on average 4.645515267175573) internal successors, (29211), 6321 states have internal predecessors, (29211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6322 states to 6322 states and 29211 transitions. [2022-11-16 16:28:13,100 INFO L78 Accepts]: Start accepts. Automaton has 6322 states and 29211 transitions. Word has length 11 [2022-11-16 16:28:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:13,100 INFO L495 AbstractCegarLoop]: Abstraction has 6322 states and 29211 transitions. [2022-11-16 16:28:13,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 6322 states and 29211 transitions. [2022-11-16 16:28:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:13,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:13,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:13,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-11-16 16:28:13,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-16 16:28:13,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:13,501 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash 403227678, now seen corresponding path program 1 times [2022-11-16 16:28:13,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:13,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098859340] [2022-11-16 16:28:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:13,502 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 [2022-11-16 16:28:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:13,503 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-16 16:28:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:13,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:28:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:14,032 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:28:14,032 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:28:14,051 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 510 treesize of output 494 [2022-11-16 16:28:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:14,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:14,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098859340] [2022-11-16 16:28:14,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098859340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175795711] [2022-11-16 16:28:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:14,902 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-16 16:28:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:28:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:15,695 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:28:15,695 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 [2022-11-16 16:28:15,720 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 130 treesize of output 126 [2022-11-16 16:28:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:28:15,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:15,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175795711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:15,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:15,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:28:15,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587674738] [2022-11-16 16:28:15,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:28:15,907 INFO L87 Difference]: Start difference. First operand 6322 states and 29211 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:16,029 INFO L93 Difference]: Finished difference Result 6320 states and 29207 transitions. [2022-11-16 16:28:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:16,048 INFO L225 Difference]: With dead ends: 6320 [2022-11-16 16:28:16,048 INFO L226 Difference]: Without dead ends: 6320 [2022-11-16 16:28:16,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:28:16,048 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:16,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2022-11-16 16:28:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 6320. [2022-11-16 16:28:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6320 states, 6286 states have (on average 4.646356983773464) internal successors, (29207), 6319 states have internal predecessors, (29207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6320 states to 6320 states and 29207 transitions. [2022-11-16 16:28:16,168 INFO L78 Accepts]: Start accepts. Automaton has 6320 states and 29207 transitions. Word has length 12 [2022-11-16 16:28:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:16,169 INFO L495 AbstractCegarLoop]: Abstraction has 6320 states and 29207 transitions. [2022-11-16 16:28:16,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6320 states and 29207 transitions. [2022-11-16 16:28:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:16,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:16,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:16,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-16 16:28:16,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-16 16:28:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:16,582 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 398873731, now seen corresponding path program 1 times [2022-11-16 16:28:16,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:16,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132423035] [2022-11-16 16:28:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:16,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:16,583 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:16,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-16 16:28:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:17,148 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:17,148 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 [2022-11-16 16:28:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:17,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132423035] [2022-11-16 16:28:17,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132423035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989620769] [2022-11-16 16:28:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:17,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:17,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:17,638 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:17,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-16 16:28:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:18,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:18,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:18,464 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:18,464 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 [2022-11-16 16:28:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:18,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:18,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989620769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:18,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:18,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:18,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043213388] [2022-11-16 16:28:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:18,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:18,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:18,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:18,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:18,632 INFO L87 Difference]: Start difference. First operand 6320 states and 29207 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:18,747 INFO L93 Difference]: Finished difference Result 6310 states and 29157 transitions. [2022-11-16 16:28:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:18,766 INFO L225 Difference]: With dead ends: 6310 [2022-11-16 16:28:18,766 INFO L226 Difference]: Without dead ends: 6310 [2022-11-16 16:28:18,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:18,766 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:18,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2022-11-16 16:28:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 6310. [2022-11-16 16:28:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6310 states, 6276 states have (on average 4.645793499043977) internal successors, (29157), 6309 states have internal predecessors, (29157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6310 states to 6310 states and 29157 transitions. [2022-11-16 16:28:18,884 INFO L78 Accepts]: Start accepts. Automaton has 6310 states and 29157 transitions. Word has length 12 [2022-11-16 16:28:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:18,884 INFO L495 AbstractCegarLoop]: Abstraction has 6310 states and 29157 transitions. [2022-11-16 16:28:18,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6310 states and 29157 transitions. [2022-11-16 16:28:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:18,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:18,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:18,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2022-11-16 16:28:19,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-16 16:28:19,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:19,288 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash 398669066, now seen corresponding path program 1 times [2022-11-16 16:28:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:19,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354377840] [2022-11-16 16:28:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:19,289 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 [2022-11-16 16:28:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:19,290 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:19,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-16 16:28:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:28:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:19,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:19,831 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:28:19,832 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 [2022-11-16 16:28:19,850 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 [2022-11-16 16:28:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:20,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:20,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354377840] [2022-11-16 16:28:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354377840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [915847538] [2022-11-16 16:28:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:20,511 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:20,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-16 16:28:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:28:21,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:21,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:21,303 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:28:21,303 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 [2022-11-16 16:28:21,327 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 88 treesize of output 84 [2022-11-16 16:28:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:21,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:21,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [915847538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:21,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:21,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:21,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278715086] [2022-11-16 16:28:21,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:21,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:21,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:21,571 INFO L87 Difference]: Start difference. First operand 6310 states and 29157 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:21,692 INFO L93 Difference]: Finished difference Result 6305 states and 29137 transitions. [2022-11-16 16:28:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:21,712 INFO L225 Difference]: With dead ends: 6305 [2022-11-16 16:28:21,712 INFO L226 Difference]: Without dead ends: 6305 [2022-11-16 16:28:21,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:21,712 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:21,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2022-11-16 16:28:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 6305. [2022-11-16 16:28:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 6271 states have (on average 4.6463084037633555) internal successors, (29137), 6304 states have internal predecessors, (29137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 29137 transitions. [2022-11-16 16:28:21,830 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 29137 transitions. Word has length 12 [2022-11-16 16:28:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:21,830 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 29137 transitions. [2022-11-16 16:28:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 29137 transitions. [2022-11-16 16:28:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:21,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:21,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:21,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (117)] Ended with exit code 0 [2022-11-16 16:28:22,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-16 16:28:22,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:22,232 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 257227756, now seen corresponding path program 1 times [2022-11-16 16:28:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029569182] [2022-11-16 16:28:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:22,233 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 [2022-11-16 16:28:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:22,234 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:22,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-16 16:28:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:22,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:22,785 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:22,786 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 [2022-11-16 16:28:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:23,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:23,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029569182] [2022-11-16 16:28:23,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029569182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465994081] [2022-11-16 16:28:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:23,294 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:23,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-16 16:28:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:23,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:23,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:24,098 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:24,098 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 [2022-11-16 16:28:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:24,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:24,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465994081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:24,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:24,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126478195] [2022-11-16 16:28:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:24,252 INFO L87 Difference]: Start difference. First operand 6305 states and 29137 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:24,374 INFO L93 Difference]: Finished difference Result 6301 states and 29121 transitions. [2022-11-16 16:28:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:24,396 INFO L225 Difference]: With dead ends: 6301 [2022-11-16 16:28:24,396 INFO L226 Difference]: Without dead ends: 6301 [2022-11-16 16:28:24,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:24,396 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:24,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2022-11-16 16:28:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 6301. [2022-11-16 16:28:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6301 states, 6267 states have (on average 4.646720919100048) internal successors, (29121), 6300 states have internal predecessors, (29121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6301 states to 6301 states and 29121 transitions. [2022-11-16 16:28:24,515 INFO L78 Accepts]: Start accepts. Automaton has 6301 states and 29121 transitions. Word has length 12 [2022-11-16 16:28:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:24,516 INFO L495 AbstractCegarLoop]: Abstraction has 6301 states and 29121 transitions. [2022-11-16 16:28:24,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6301 states and 29121 transitions. [2022-11-16 16:28:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:24,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:24,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:24,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:24,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-16 16:28:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:24,917 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash 250889152, now seen corresponding path program 1 times [2022-11-16 16:28:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:24,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936996710] [2022-11-16 16:28:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:24,918 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 [2022-11-16 16:28:24,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:24,919 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:24,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-16 16:28:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:28:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:25,458 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:28:25,458 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 [2022-11-16 16:28:25,476 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 [2022-11-16 16:28:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:25,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:26,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:26,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936996710] [2022-11-16 16:28:26,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936996710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:26,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445924622] [2022-11-16 16:28:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:26,101 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:26,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:26,102 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:26,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-11-16 16:28:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:28:26,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:26,912 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:28:26,912 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 [2022-11-16 16:28:26,931 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 282 treesize of output 266 [2022-11-16 16:28:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:27,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:27,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445924622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:27,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:27,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940990119] [2022-11-16 16:28:27,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:27,128 INFO L87 Difference]: Start difference. First operand 6301 states and 29121 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:27,248 INFO L93 Difference]: Finished difference Result 6296 states and 29101 transitions. [2022-11-16 16:28:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:27,266 INFO L225 Difference]: With dead ends: 6296 [2022-11-16 16:28:27,267 INFO L226 Difference]: Without dead ends: 6296 [2022-11-16 16:28:27,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:27,267 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:27,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2022-11-16 16:28:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6296. [2022-11-16 16:28:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6262 states have (on average 4.647237304375599) internal successors, (29101), 6295 states have internal predecessors, (29101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 29101 transitions. [2022-11-16 16:28:27,381 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 29101 transitions. Word has length 12 [2022-11-16 16:28:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:27,381 INFO L495 AbstractCegarLoop]: Abstraction has 6296 states and 29101 transitions. [2022-11-16 16:28:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 29101 transitions. [2022-11-16 16:28:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:27,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:27,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:27,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:27,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (121)] Ended with exit code 0 [2022-11-16 16:28:27,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:27,794 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1813339757, now seen corresponding path program 1 times [2022-11-16 16:28:27,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:27,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295601036] [2022-11-16 16:28:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:27,795 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 [2022-11-16 16:28:27,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:27,796 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:27,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-16 16:28:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:28,365 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:28,365 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 [2022-11-16 16:28:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:28,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:28,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295601036] [2022-11-16 16:28:28,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295601036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1960930364] [2022-11-16 16:28:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:28,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:28,849 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:28,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-16 16:28:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:29,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:29,654 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:29,654 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 [2022-11-16 16:28:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:29,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:29,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1960930364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:29,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:29,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:29,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994425076] [2022-11-16 16:28:29,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:29,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:29,814 INFO L87 Difference]: Start difference. First operand 6296 states and 29101 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:29,934 INFO L93 Difference]: Finished difference Result 6292 states and 29085 transitions. [2022-11-16 16:28:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:29,953 INFO L225 Difference]: With dead ends: 6292 [2022-11-16 16:28:29,953 INFO L226 Difference]: Without dead ends: 6292 [2022-11-16 16:28:29,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:29,953 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:29,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2022-11-16 16:28:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 6292. [2022-11-16 16:28:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 6258 states have (on average 4.647651006711409) internal successors, (29085), 6291 states have internal predecessors, (29085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 29085 transitions. [2022-11-16 16:28:30,153 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 29085 transitions. Word has length 12 [2022-11-16 16:28:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:30,153 INFO L495 AbstractCegarLoop]: Abstraction has 6292 states and 29085 transitions. [2022-11-16 16:28:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 29085 transitions. [2022-11-16 16:28:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:30,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:30,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:30,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:30,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (123)] Ended with exit code 0 [2022-11-16 16:28:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:30,555 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1813356900, now seen corresponding path program 1 times [2022-11-16 16:28:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853885589] [2022-11-16 16:28:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:30,556 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 [2022-11-16 16:28:30,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:30,557 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:30,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-16 16:28:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:31,162 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:31,162 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 [2022-11-16 16:28:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:31,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:31,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:31,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853885589] [2022-11-16 16:28:31,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853885589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1322118238] [2022-11-16 16:28:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:31,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:31,646 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:31,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (125)] Waiting until timeout for monitored process [2022-11-16 16:28:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:32,525 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:32,525 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 [2022-11-16 16:28:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:32,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:32,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1322118238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:32,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:32,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392501231] [2022-11-16 16:28:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:32,667 INFO L87 Difference]: Start difference. First operand 6292 states and 29085 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:32,797 INFO L93 Difference]: Finished difference Result 6287 states and 29060 transitions. [2022-11-16 16:28:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:32,817 INFO L225 Difference]: With dead ends: 6287 [2022-11-16 16:28:32,817 INFO L226 Difference]: Without dead ends: 6287 [2022-11-16 16:28:32,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:32,817 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:32,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2022-11-16 16:28:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6287. [2022-11-16 16:28:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 6253 states have (on average 4.6473692627538785) internal successors, (29060), 6286 states have internal predecessors, (29060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 29060 transitions. [2022-11-16 16:28:32,927 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 29060 transitions. Word has length 12 [2022-11-16 16:28:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:32,928 INFO L495 AbstractCegarLoop]: Abstraction has 6287 states and 29060 transitions. [2022-11-16 16:28:32,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 29060 transitions. [2022-11-16 16:28:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:32,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:32,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:32,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (125)] Ended with exit code 0 [2022-11-16 16:28:33,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:33,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:33,329 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1616844766, now seen corresponding path program 1 times [2022-11-16 16:28:33,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:33,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681016046] [2022-11-16 16:28:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:33,330 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 [2022-11-16 16:28:33,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:33,331 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:33,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-16 16:28:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:33,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:28:33,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:33,851 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:28:33,851 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 [2022-11-16 16:28:33,867 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 [2022-11-16 16:28:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:34,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:34,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:34,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681016046] [2022-11-16 16:28:34,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681016046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:34,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773980319] [2022-11-16 16:28:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:34,698 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:34,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-16 16:28:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:28:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:35,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:35,527 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:28:35,528 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 [2022-11-16 16:28:35,550 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 250 treesize of output 242 [2022-11-16 16:28:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:28:35,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [773980319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:35,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:28:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484452236] [2022-11-16 16:28:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:28:35,737 INFO L87 Difference]: Start difference. First operand 6287 states and 29060 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:35,864 INFO L93 Difference]: Finished difference Result 6285 states and 29056 transitions. [2022-11-16 16:28:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:35,882 INFO L225 Difference]: With dead ends: 6285 [2022-11-16 16:28:35,882 INFO L226 Difference]: Without dead ends: 6285 [2022-11-16 16:28:35,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:28:35,883 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:35,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2022-11-16 16:28:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6285. [2022-11-16 16:28:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6285 states, 6251 states have (on average 4.648216285394337) internal successors, (29056), 6284 states have internal predecessors, (29056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6285 states to 6285 states and 29056 transitions. [2022-11-16 16:28:36,017 INFO L78 Accepts]: Start accepts. Automaton has 6285 states and 29056 transitions. Word has length 12 [2022-11-16 16:28:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:36,017 INFO L495 AbstractCegarLoop]: Abstraction has 6285 states and 29056 transitions. [2022-11-16 16:28:36,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6285 states and 29056 transitions. [2022-11-16 16:28:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:36,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:36,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:36,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Ended with exit code 0 [2022-11-16 16:28:36,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (127)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:36,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:36,422 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:36,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1934131782, now seen corresponding path program 1 times [2022-11-16 16:28:36,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:36,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683175140] [2022-11-16 16:28:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:36,423 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 [2022-11-16 16:28:36,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:36,424 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:36,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-16 16:28:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:36,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:37,008 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:37,009 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 [2022-11-16 16:28:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:37,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:37,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683175140] [2022-11-16 16:28:37,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683175140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313909345] [2022-11-16 16:28:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:37,496 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:37,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-16 16:28:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:38,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:38,352 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:38,352 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 [2022-11-16 16:28:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:38,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:38,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313909345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:38,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:38,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:38,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705229032] [2022-11-16 16:28:38,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:38,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:38,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:38,518 INFO L87 Difference]: Start difference. First operand 6285 states and 29056 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:38,632 INFO L93 Difference]: Finished difference Result 6275 states and 29006 transitions. [2022-11-16 16:28:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:38,651 INFO L225 Difference]: With dead ends: 6275 [2022-11-16 16:28:38,651 INFO L226 Difference]: Without dead ends: 6275 [2022-11-16 16:28:38,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:38,651 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:38,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2022-11-16 16:28:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 6275. [2022-11-16 16:28:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6241 states have (on average 4.647652619772472) internal successors, (29006), 6274 states have internal predecessors, (29006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 29006 transitions. [2022-11-16 16:28:38,766 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 29006 transitions. Word has length 12 [2022-11-16 16:28:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:38,766 INFO L495 AbstractCegarLoop]: Abstraction has 6275 states and 29006 transitions. [2022-11-16 16:28:38,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 29006 transitions. [2022-11-16 16:28:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:38,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:38,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:38,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:38,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (129)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:39,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:39,168 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1934247040, now seen corresponding path program 1 times [2022-11-16 16:28:39,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:39,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214028080] [2022-11-16 16:28:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:39,169 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 [2022-11-16 16:28:39,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:39,169 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:39,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-16 16:28:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:39,768 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:39,769 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 [2022-11-16 16:28:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:39,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:40,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214028080] [2022-11-16 16:28:40,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214028080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585322762] [2022-11-16 16:28:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:40,255 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:40,256 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:40,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-16 16:28:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:41,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:41,180 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:41,180 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 [2022-11-16 16:28:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:41,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:41,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585322762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:41,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:28:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017446351] [2022-11-16 16:28:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:41,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:41,320 INFO L87 Difference]: Start difference. First operand 6275 states and 29006 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:41,446 INFO L93 Difference]: Finished difference Result 6270 states and 28981 transitions. [2022-11-16 16:28:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:41,464 INFO L225 Difference]: With dead ends: 6270 [2022-11-16 16:28:41,464 INFO L226 Difference]: Without dead ends: 6270 [2022-11-16 16:28:41,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:28:41,465 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:41,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6270 states. [2022-11-16 16:28:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6270 to 6270. [2022-11-16 16:28:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 6236 states have (on average 4.647370109044259) internal successors, (28981), 6269 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 28981 transitions. [2022-11-16 16:28:41,576 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 28981 transitions. Word has length 12 [2022-11-16 16:28:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:41,577 INFO L495 AbstractCegarLoop]: Abstraction has 6270 states and 28981 transitions. [2022-11-16 16:28:41,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 28981 transitions. [2022-11-16 16:28:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:41,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:41,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:41,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (131)] Ended with exit code 0 [2022-11-16 16:28:41,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:41,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:41,984 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1933600473, now seen corresponding path program 1 times [2022-11-16 16:28:41,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:41,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851602674] [2022-11-16 16:28:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:41,985 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 [2022-11-16 16:28:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:41,986 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:41,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-16 16:28:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:42,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:28:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:42,576 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:42,576 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 [2022-11-16 16:28:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:42,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:43,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:43,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851602674] [2022-11-16 16:28:43,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851602674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:43,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1241266426] [2022-11-16 16:28:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:28:43,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:43,314 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:43,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-16 16:28:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:28:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:28:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:43,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:28:44,169 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:28:44,169 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 [2022-11-16 16:28:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:28:44,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:28:44,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1241266426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:28:44,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:28:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:28:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044631290] [2022-11-16 16:28:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:28:44,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:28:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:28:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:28:44,311 INFO L87 Difference]: Start difference. First operand 6270 states and 28981 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:28:44,431 INFO L93 Difference]: Finished difference Result 6268 states and 28975 transitions. [2022-11-16 16:28:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:28:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:28:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:28:44,449 INFO L225 Difference]: With dead ends: 6268 [2022-11-16 16:28:44,450 INFO L226 Difference]: Without dead ends: 6268 [2022-11-16 16:28:44,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:28:44,450 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:28:44,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:28:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6268 states. [2022-11-16 16:28:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6268 to 6268. [2022-11-16 16:28:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6268 states, 6234 states have (on average 4.647898620468399) internal successors, (28975), 6267 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 28975 transitions. [2022-11-16 16:28:44,567 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 28975 transitions. Word has length 12 [2022-11-16 16:28:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:28:44,567 INFO L495 AbstractCegarLoop]: Abstraction has 6268 states and 28975 transitions. [2022-11-16 16:28:44,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:28:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 28975 transitions. [2022-11-16 16:28:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:28:44,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:28:44,568 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:28:44,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2022-11-16 16:28:44,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-16 16:28:44,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:28:44,974 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:28:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:28:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1424779895, now seen corresponding path program 2 times [2022-11-16 16:28:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:28:44,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757734503] [2022-11-16 16:28:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:28:44,974 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 [2022-11-16 16:28:44,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:28:44,975 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:28:44,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-16 16:28:45,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:28:45,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:28:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:28:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:45,555 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:28:45,555 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 [2022-11-16 16:28:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:45,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:28:47,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:28:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757734503] [2022-11-16 16:28:47,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757734503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [351408651] [2022-11-16 16:28:47,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:28:47,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:28:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:28:47,405 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:28:47,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2022-11-16 16:28:48,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:28:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:28:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:48,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:49,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [351408651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:49,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103835025] [2022-11-16 16:28:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:28:49,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:28:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:28:49,341 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:28:49,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-16 16:28:49,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:28:49,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:28:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:28:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:28:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:49,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:28:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:28:49,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103835025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:28:49,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:28:49,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-16 16:28:49,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705612859] [2022-11-16 16:28:49,926 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:28:49,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 16:28:49,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:28:49,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 16:28:49,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:28:49,927 INFO L87 Difference]: Start difference. First operand 6268 states and 28975 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:29:21,160 INFO L93 Difference]: Finished difference Result 22541 states and 100259 transitions. [2022-11-16 16:29:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 16:29:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:29:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:29:21,240 INFO L225 Difference]: With dead ends: 22541 [2022-11-16 16:29:21,241 INFO L226 Difference]: Without dead ends: 22541 [2022-11-16 16:29:21,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 16:29:21,241 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2015 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:29:21,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 135 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-11-16 16:29:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22541 states. [2022-11-16 16:29:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22541 to 10916. [2022-11-16 16:29:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10916 states, 10882 states have (on average 4.697573975372174) internal successors, (51119), 10915 states have internal predecessors, (51119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10916 states to 10916 states and 51119 transitions. [2022-11-16 16:29:21,593 INFO L78 Accepts]: Start accepts. Automaton has 10916 states and 51119 transitions. Word has length 12 [2022-11-16 16:29:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:29:21,593 INFO L495 AbstractCegarLoop]: Abstraction has 10916 states and 51119 transitions. [2022-11-16 16:29:21,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:29:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10916 states and 51119 transitions. [2022-11-16 16:29:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:29:21,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:29:21,595 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 16:29:21,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (135)] Ended with exit code 0 [2022-11-16 16:29:21,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-16 16:29:22,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-16 16:29:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:29:22,195 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:29:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:29:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 38615312, now seen corresponding path program 3 times [2022-11-16 16:29:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:29:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045661554] [2022-11-16 16:29:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:22,196 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 [2022-11-16 16:29:22,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:29:22,197 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:29:22,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-16 16:29:22,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:29:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:29:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:22,893 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:29:22,893 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 [2022-11-16 16:29:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:23,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:26,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:29:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045661554] [2022-11-16 16:29:26,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045661554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1885342980] [2022-11-16 16:29:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:26,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:29:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:29:26,267 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:29:26,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2022-11-16 16:29:27,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:29:27,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:29:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:27,801 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:29:27,801 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 [2022-11-16 16:29:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:27,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:32,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1885342980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134376661] [2022-11-16 16:29:32,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:29:32,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:29:32,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:29:32,559 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:29:32,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-16 16:29:34,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 16:29:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:29:34,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 16:29:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:29:35,003 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:29:35,003 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 [2022-11-16 16:29:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:35,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:29:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:29:36,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134376661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:29:36,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:29:36,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-16 16:29:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441587440] [2022-11-16 16:29:36,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:29:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 16:29:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:29:36,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 16:29:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 16:29:36,219 INFO L87 Difference]: Start difference. First operand 10916 states and 51119 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:16,353 INFO L93 Difference]: Finished difference Result 107953 states and 523009 transitions. [2022-11-16 16:30:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 16:30:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:30:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:17,678 INFO L225 Difference]: With dead ends: 107953 [2022-11-16 16:30:17,678 INFO L226 Difference]: Without dead ends: 107953 [2022-11-16 16:30:17,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=941, Invalid=1921, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 16:30:17,679 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6739 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6805 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6739 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 6832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:17,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6739 Valid, 172 Invalid, 6832 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 6805 Invalid, 0 Unknown, 0 Unchecked, 22.4s Time] [2022-11-16 16:30:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107953 states. [2022-11-16 16:30:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107953 to 10928. [2022-11-16 16:30:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10894 states have (on average 4.694602533504681) internal successors, (51143), 10927 states have internal predecessors, (51143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 51143 transitions. [2022-11-16 16:30:19,828 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 51143 transitions. Word has length 12 [2022-11-16 16:30:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:19,828 INFO L495 AbstractCegarLoop]: Abstraction has 10928 states and 51143 transitions. [2022-11-16 16:30:19,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 51143 transitions. [2022-11-16 16:30:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:19,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:19,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:19,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-11-16 16:30:20,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (138)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:20,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-16 16:30:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:30:20,431 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash -384640914, now seen corresponding path program 1 times [2022-11-16 16:30:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032764401] [2022-11-16 16:30:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:20,432 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 [2022-11-16 16:30:20,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:20,434 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-16 16:30:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:30:20,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:21,123 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:21,123 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 [2022-11-16 16:30:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:21,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:21,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032764401] [2022-11-16 16:30:21,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032764401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [9441741] [2022-11-16 16:30:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:21,992 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:21,993 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:21,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2022-11-16 16:30:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:22,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:22,991 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:22,991 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 [2022-11-16 16:30:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:30:23,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:23,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [9441741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:23,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:23,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:30:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862334348] [2022-11-16 16:30:23,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:23,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:30:23,302 INFO L87 Difference]: Start difference. First operand 10928 states and 51143 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:23,468 INFO L93 Difference]: Finished difference Result 10924 states and 51131 transitions. [2022-11-16 16:30:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:23,516 INFO L225 Difference]: With dead ends: 10924 [2022-11-16 16:30:23,516 INFO L226 Difference]: Without dead ends: 10924 [2022-11-16 16:30:23,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:30:23,517 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:23,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10924 states. [2022-11-16 16:30:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10924 to 10924. [2022-11-16 16:30:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10924 states, 10890 states have (on average 4.695224977043159) internal successors, (51131), 10923 states have internal predecessors, (51131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10924 states to 10924 states and 51131 transitions. [2022-11-16 16:30:23,958 INFO L78 Accepts]: Start accepts. Automaton has 10924 states and 51131 transitions. Word has length 13 [2022-11-16 16:30:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:23,958 INFO L495 AbstractCegarLoop]: Abstraction has 10924 states and 51131 transitions. [2022-11-16 16:30:23,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 10924 states and 51131 transitions. [2022-11-16 16:30:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:23,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:23,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:23,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (141)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:24,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-16 16:30:24,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:30:24,361 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:24,362 INFO L85 PathProgramCache]: Analyzing trace with hash -384845579, now seen corresponding path program 1 times [2022-11-16 16:30:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:24,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261138974] [2022-11-16 16:30:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:24,362 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 [2022-11-16 16:30:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:24,363 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:24,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-16 16:30:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:24,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:30:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:24,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:24,986 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:30:24,986 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 [2022-11-16 16:30:25,010 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 [2022-11-16 16:30:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:25,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:26,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:26,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261138974] [2022-11-16 16:30:26,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261138974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:26,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [685440049] [2022-11-16 16:30:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:26,054 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:26,055 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:26,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2022-11-16 16:30:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:30:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:26,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:27,047 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:30:27,048 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 [2022-11-16 16:30:27,076 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 510 treesize of output 494 [2022-11-16 16:30:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:30:27,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:27,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [685440049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:27,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:27,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:30:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628606644] [2022-11-16 16:30:27,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:27,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:30:27,502 INFO L87 Difference]: Start difference. First operand 10924 states and 51131 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:27,697 INFO L93 Difference]: Finished difference Result 10922 states and 51127 transitions. [2022-11-16 16:30:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:27,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:27,743 INFO L225 Difference]: With dead ends: 10922 [2022-11-16 16:30:27,743 INFO L226 Difference]: Without dead ends: 10922 [2022-11-16 16:30:27,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:30:27,744 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:27,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10922 states. [2022-11-16 16:30:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10922 to 10922. [2022-11-16 16:30:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10922 states, 10888 states have (on average 4.695720058780308) internal successors, (51127), 10921 states have internal predecessors, (51127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10922 states to 10922 states and 51127 transitions. [2022-11-16 16:30:28,203 INFO L78 Accepts]: Start accepts. Automaton has 10922 states and 51127 transitions. Word has length 13 [2022-11-16 16:30:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:28,203 INFO L495 AbstractCegarLoop]: Abstraction has 10922 states and 51127 transitions. [2022-11-16 16:30:28,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 10922 states and 51127 transitions. [2022-11-16 16:30:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:28,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:28,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:28,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:28,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (143)] Ended with exit code 0 [2022-11-16 16:30:28,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:28,615 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -519822242, now seen corresponding path program 1 times [2022-11-16 16:30:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823150155] [2022-11-16 16:30:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:28,616 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 [2022-11-16 16:30:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:28,618 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:28,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-16 16:30:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:30:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:29,379 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:29,380 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 [2022-11-16 16:30:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:29,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:30,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823150155] [2022-11-16 16:30:30,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823150155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:30,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1682784893] [2022-11-16 16:30:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:30,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:30,003 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:30,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (145)] Waiting until timeout for monitored process [2022-11-16 16:30:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:30,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:30,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:30,968 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:30,969 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 [2022-11-16 16:30:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:31,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:31,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1682784893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:31,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:31,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080733558] [2022-11-16 16:30:31,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:31,158 INFO L87 Difference]: Start difference. First operand 10922 states and 51127 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:31,339 INFO L93 Difference]: Finished difference Result 10906 states and 51051 transitions. [2022-11-16 16:30:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:31,386 INFO L225 Difference]: With dead ends: 10906 [2022-11-16 16:30:31,386 INFO L226 Difference]: Without dead ends: 10906 [2022-11-16 16:30:31,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:31,386 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:31,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10906 states. [2022-11-16 16:30:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10906 to 10906. [2022-11-16 16:30:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10906 states, 10872 states have (on average 4.695640176600442) internal successors, (51051), 10905 states have internal predecessors, (51051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10906 states to 10906 states and 51051 transitions. [2022-11-16 16:30:31,932 INFO L78 Accepts]: Start accepts. Automaton has 10906 states and 51051 transitions. Word has length 13 [2022-11-16 16:30:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:31,932 INFO L495 AbstractCegarLoop]: Abstraction has 10906 states and 51051 transitions. [2022-11-16 16:30:31,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10906 states and 51051 transitions. [2022-11-16 16:30:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:31,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:31,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:31,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-16 16:30:32,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (145)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:32,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:32,334 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash -526160846, now seen corresponding path program 1 times [2022-11-16 16:30:32,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:32,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428298406] [2022-11-16 16:30:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:32,335 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 [2022-11-16 16:30:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:32,336 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:32,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-16 16:30:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:30:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:33,038 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:30:33,038 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 [2022-11-16 16:30:33,061 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 [2022-11-16 16:30:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:33,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:33,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428298406] [2022-11-16 16:30:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428298406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188089185] [2022-11-16 16:30:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:33,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:33,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:33,864 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:33,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (147)] Waiting until timeout for monitored process [2022-11-16 16:30:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:30:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:35,003 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:30:35,004 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 [2022-11-16 16:30:35,034 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 460 treesize of output 444 [2022-11-16 16:30:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:35,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:35,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188089185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:35,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:35,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:35,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408763048] [2022-11-16 16:30:35,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:35,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:35,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:35,284 INFO L87 Difference]: Start difference. First operand 10906 states and 51051 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:35,458 INFO L93 Difference]: Finished difference Result 10877 states and 50905 transitions. [2022-11-16 16:30:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:35,500 INFO L225 Difference]: With dead ends: 10877 [2022-11-16 16:30:35,500 INFO L226 Difference]: Without dead ends: 10877 [2022-11-16 16:30:35,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:35,500 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:35,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2022-11-16 16:30:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 10877. [2022-11-16 16:30:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10877 states, 10843 states have (on average 4.694733929724246) internal successors, (50905), 10876 states have internal predecessors, (50905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10877 states to 10877 states and 50905 transitions. [2022-11-16 16:30:35,883 INFO L78 Accepts]: Start accepts. Automaton has 10877 states and 50905 transitions. Word has length 13 [2022-11-16 16:30:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:35,883 INFO L495 AbstractCegarLoop]: Abstraction has 10877 states and 50905 transitions. [2022-11-16 16:30:35,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10877 states and 50905 transitions. [2022-11-16 16:30:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:35,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:35,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:35,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-16 16:30:36,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (147)] Ended with exit code 0 [2022-11-16 16:30:36,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:36,284 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash -615875955, now seen corresponding path program 1 times [2022-11-16 16:30:36,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721184767] [2022-11-16 16:30:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:36,286 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 [2022-11-16 16:30:36,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:36,286 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:36,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-16 16:30:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:30:36,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:36,983 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:36,983 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 [2022-11-16 16:30:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:37,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721184767] [2022-11-16 16:30:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721184767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1484332957] [2022-11-16 16:30:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:37,591 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:37,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (149)] Waiting until timeout for monitored process [2022-11-16 16:30:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:38,699 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:38,699 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 [2022-11-16 16:30:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:38,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:38,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1484332957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:38,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:38,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694343844] [2022-11-16 16:30:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:38,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:38,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:38,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:38,880 INFO L87 Difference]: Start difference. First operand 10877 states and 50905 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:39,233 INFO L93 Difference]: Finished difference Result 10869 states and 50873 transitions. [2022-11-16 16:30:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:39,285 INFO L225 Difference]: With dead ends: 10869 [2022-11-16 16:30:39,285 INFO L226 Difference]: Without dead ends: 10869 [2022-11-16 16:30:39,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:39,285 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:39,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10869 states. [2022-11-16 16:30:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 10869. [2022-11-16 16:30:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10869 states, 10835 states have (on average 4.695246885094601) internal successors, (50873), 10868 states have internal predecessors, (50873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10869 states to 10869 states and 50873 transitions. [2022-11-16 16:30:39,546 INFO L78 Accepts]: Start accepts. Automaton has 10869 states and 50873 transitions. Word has length 13 [2022-11-16 16:30:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:39,547 INFO L495 AbstractCegarLoop]: Abstraction has 10869 states and 50873 transitions. [2022-11-16 16:30:39,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10869 states and 50873 transitions. [2022-11-16 16:30:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:39,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:39,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:39,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Ended with exit code 0 [2022-11-16 16:30:39,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (149)] Ended with exit code 0 [2022-11-16 16:30:39,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:39,948 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -615858812, now seen corresponding path program 1 times [2022-11-16 16:30:39,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:39,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3940072] [2022-11-16 16:30:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:39,950 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 [2022-11-16 16:30:39,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:39,951 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:39,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-16 16:30:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:30:40,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:40,758 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:40,758 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 [2022-11-16 16:30:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:41,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:41,426 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3940072] [2022-11-16 16:30:41,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3940072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2082903032] [2022-11-16 16:30:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:41,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:41,427 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:41,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (151)] Waiting until timeout for monitored process [2022-11-16 16:30:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:42,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:42,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:42,496 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:42,496 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 [2022-11-16 16:30:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:42,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:42,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2082903032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:42,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:42,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:42,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344553174] [2022-11-16 16:30:42,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:42,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:42,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:42,665 INFO L87 Difference]: Start difference. First operand 10869 states and 50873 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:43,018 INFO L93 Difference]: Finished difference Result 10856 states and 50806 transitions. [2022-11-16 16:30:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:43,068 INFO L225 Difference]: With dead ends: 10856 [2022-11-16 16:30:43,068 INFO L226 Difference]: Without dead ends: 10856 [2022-11-16 16:30:43,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:43,068 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:43,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10856 states. [2022-11-16 16:30:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10856 to 10856. [2022-11-16 16:30:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10856 states, 10822 states have (on average 4.694695989650712) internal successors, (50806), 10855 states have internal predecessors, (50806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10856 states to 10856 states and 50806 transitions. [2022-11-16 16:30:43,433 INFO L78 Accepts]: Start accepts. Automaton has 10856 states and 50806 transitions. Word has length 13 [2022-11-16 16:30:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:43,433 INFO L495 AbstractCegarLoop]: Abstraction has 10856 states and 50806 transitions. [2022-11-16 16:30:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 10856 states and 50806 transitions. [2022-11-16 16:30:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:43,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:43,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:43,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Ended with exit code 0 [2022-11-16 16:30:43,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (151)] Ended with exit code 0 [2022-11-16 16:30:43,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:43,836 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -812370946, now seen corresponding path program 1 times [2022-11-16 16:30:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:43,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982385958] [2022-11-16 16:30:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:43,837 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 [2022-11-16 16:30:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:43,838 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:43,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-16 16:30:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:30:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:44,570 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 16:30:44,570 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 16:30:44,596 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 130 treesize of output 126 [2022-11-16 16:30:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:45,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:45,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982385958] [2022-11-16 16:30:45,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982385958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998099130] [2022-11-16 16:30:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:45,457 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:45,458 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:45,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (153)] Waiting until timeout for monitored process [2022-11-16 16:30:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:30:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:46,522 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:30:46,522 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 [2022-11-16 16:30:46,548 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 623 treesize of output 591 [2022-11-16 16:30:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:30:46,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:46,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998099130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:46,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:46,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:46,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805306307] [2022-11-16 16:30:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:46,893 INFO L87 Difference]: Start difference. First operand 10856 states and 50806 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:47,081 INFO L93 Difference]: Finished difference Result 10853 states and 50799 transitions. [2022-11-16 16:30:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:47,123 INFO L225 Difference]: With dead ends: 10853 [2022-11-16 16:30:47,123 INFO L226 Difference]: Without dead ends: 10853 [2022-11-16 16:30:47,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:47,124 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:47,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10853 states. [2022-11-16 16:30:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10853 to 10853. [2022-11-16 16:30:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10819 states have (on average 4.695350771790369) internal successors, (50799), 10852 states have internal predecessors, (50799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 50799 transitions. [2022-11-16 16:30:47,345 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 50799 transitions. Word has length 13 [2022-11-16 16:30:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:47,345 INFO L495 AbstractCegarLoop]: Abstraction has 10853 states and 50799 transitions. [2022-11-16 16:30:47,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 50799 transitions. [2022-11-16 16:30:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:47,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:47,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:47,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-16 16:30:47,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (153)] Ended with exit code 0 [2022-11-16 16:30:47,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:47,747 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 378957525, now seen corresponding path program 1 times [2022-11-16 16:30:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:47,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485128051] [2022-11-16 16:30:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:47,748 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 [2022-11-16 16:30:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:47,749 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:47,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-16 16:30:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:30:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:48,549 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:48,549 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 [2022-11-16 16:30:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:48,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:49,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:49,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485128051] [2022-11-16 16:30:49,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485128051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:49,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31290976] [2022-11-16 16:30:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:49,227 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:49,228 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:49,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (155)] Waiting until timeout for monitored process [2022-11-16 16:30:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:50,443 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:50,443 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 [2022-11-16 16:30:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:50,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:50,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [31290976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:50,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:50,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:50,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674581249] [2022-11-16 16:30:50,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:50,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:50,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:50,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:50,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:50,754 INFO L87 Difference]: Start difference. First operand 10853 states and 50799 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:50,940 INFO L93 Difference]: Finished difference Result 10827 states and 50665 transitions. [2022-11-16 16:30:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:50,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:50,984 INFO L225 Difference]: With dead ends: 10827 [2022-11-16 16:30:50,985 INFO L226 Difference]: Without dead ends: 10827 [2022-11-16 16:30:50,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:50,985 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:50,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10827 states. [2022-11-16 16:30:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10827 to 10827. [2022-11-16 16:30:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10793 states have (on average 4.694246270731029) internal successors, (50665), 10826 states have internal predecessors, (50665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 50665 transitions. [2022-11-16 16:30:51,246 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 50665 transitions. Word has length 13 [2022-11-16 16:30:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:51,247 INFO L495 AbstractCegarLoop]: Abstraction has 10827 states and 50665 transitions. [2022-11-16 16:30:51,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 50665 transitions. [2022-11-16 16:30:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:51,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:51,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:51,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (155)] Ended with exit code 0 [2022-11-16 16:30:51,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Ended with exit code 0 [2022-11-16 16:30:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:30:51,649 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash 378842267, now seen corresponding path program 1 times [2022-11-16 16:30:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:51,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898223452] [2022-11-16 16:30:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:51,650 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 [2022-11-16 16:30:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:51,650 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:51,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-16 16:30:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:30:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:52,335 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:52,336 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 [2022-11-16 16:30:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:52,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:30:52,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898223452] [2022-11-16 16:30:52,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898223452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1818179966] [2022-11-16 16:30:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:52,949 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:52,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:52,950 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:52,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (157)] Waiting until timeout for monitored process [2022-11-16 16:30:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:54,041 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:54,042 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 [2022-11-16 16:30:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:54,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:54,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1818179966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:54,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801138821] [2022-11-16 16:30:54,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:54,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:54,327 INFO L87 Difference]: Start difference. First operand 10827 states and 50665 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:54,513 INFO L93 Difference]: Finished difference Result 10814 states and 50598 transitions. [2022-11-16 16:30:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:54,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:54,549 INFO L225 Difference]: With dead ends: 10814 [2022-11-16 16:30:54,550 INFO L226 Difference]: Without dead ends: 10814 [2022-11-16 16:30:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:54,550 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:54,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10814 states. [2022-11-16 16:30:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10814 to 10814. [2022-11-16 16:30:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10814 states, 10780 states have (on average 4.693692022263451) internal successors, (50598), 10813 states have internal predecessors, (50598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10814 states to 10814 states and 50598 transitions. [2022-11-16 16:30:54,760 INFO L78 Accepts]: Start accepts. Automaton has 10814 states and 50598 transitions. Word has length 13 [2022-11-16 16:30:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:54,760 INFO L495 AbstractCegarLoop]: Abstraction has 10814 states and 50598 transitions. [2022-11-16 16:30:54,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 10814 states and 50598 transitions. [2022-11-16 16:30:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:54,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:54,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:54,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-16 16:30:54,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (157)] Forceful destruction successful, exit code 0 [2022-11-16 16:30:55,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:55,162 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 379488834, now seen corresponding path program 1 times [2022-11-16 16:30:55,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:55,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95914403] [2022-11-16 16:30:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:55,163 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 [2022-11-16 16:30:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:55,164 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:55,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-16 16:30:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:30:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:55,831 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:55,831 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 [2022-11-16 16:30:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:56,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:30:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:56,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:30:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95914403] [2022-11-16 16:30:56,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95914403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:30:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768275211] [2022-11-16 16:30:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:56,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:30:56,339 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:30:56,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (159)] Waiting until timeout for monitored process [2022-11-16 16:30:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:30:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:30:57,403 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:30:57,403 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 [2022-11-16 16:30:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:30:57,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:30:57,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768275211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:30:57,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:30:57,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:30:57,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348083358] [2022-11-16 16:30:57,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:30:57,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:30:57,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:30:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:30:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:57,652 INFO L87 Difference]: Start difference. First operand 10814 states and 50598 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:30:57,859 INFO L93 Difference]: Finished difference Result 10810 states and 50586 transitions. [2022-11-16 16:30:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:30:57,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:30:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:30:57,911 INFO L225 Difference]: With dead ends: 10810 [2022-11-16 16:30:57,911 INFO L226 Difference]: Without dead ends: 10810 [2022-11-16 16:30:57,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:30:57,911 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:30:57,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:30:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10810 states. [2022-11-16 16:30:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10810 to 10810. [2022-11-16 16:30:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10810 states, 10776 states have (on average 4.694320712694878) internal successors, (50586), 10809 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10810 states to 10810 states and 50586 transitions. [2022-11-16 16:30:58,182 INFO L78 Accepts]: Start accepts. Automaton has 10810 states and 50586 transitions. Word has length 13 [2022-11-16 16:30:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:30:58,182 INFO L495 AbstractCegarLoop]: Abstraction has 10810 states and 50586 transitions. [2022-11-16 16:30:58,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:30:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10810 states and 50586 transitions. [2022-11-16 16:30:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:30:58,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:30:58,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:30:58,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Ended with exit code 0 [2022-11-16 16:30:58,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (159)] Ended with exit code 0 [2022-11-16 16:30:58,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:30:58,584 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:30:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:30:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash 171456746, now seen corresponding path program 1 times [2022-11-16 16:30:58,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:30:58,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495076719] [2022-11-16 16:30:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:30:58,585 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 [2022-11-16 16:30:58,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:30:58,586 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:30:58,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-16 16:30:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:30:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:30:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:30:59,255 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:30:59,255 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 [2022-11-16 16:30:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:30:59,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:00,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:00,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495076719] [2022-11-16 16:31:00,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495076719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:00,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933677890] [2022-11-16 16:31:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:00,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:00,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:00,114 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:00,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (161)] Waiting until timeout for monitored process [2022-11-16 16:31:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:01,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:01,306 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:01,306 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 [2022-11-16 16:31:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:01,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:01,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933677890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:01,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:01,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479505312] [2022-11-16 16:31:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:01,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:01,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:01,493 INFO L87 Difference]: Start difference. First operand 10810 states and 50586 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:01,677 INFO L93 Difference]: Finished difference Result 10802 states and 50562 transitions. [2022-11-16 16:31:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:31:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:01,725 INFO L225 Difference]: With dead ends: 10802 [2022-11-16 16:31:01,725 INFO L226 Difference]: Without dead ends: 10802 [2022-11-16 16:31:01,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:01,725 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:01,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10802 states. [2022-11-16 16:31:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10802 to 10802. [2022-11-16 16:31:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10802 states, 10768 states have (on average 4.695579494799405) internal successors, (50562), 10801 states have internal predecessors, (50562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10802 states to 10802 states and 50562 transitions. [2022-11-16 16:31:01,985 INFO L78 Accepts]: Start accepts. Automaton has 10802 states and 50562 transitions. Word has length 13 [2022-11-16 16:31:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:01,986 INFO L495 AbstractCegarLoop]: Abstraction has 10802 states and 50562 transitions. [2022-11-16 16:31:01,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10802 states and 50562 transitions. [2022-11-16 16:31:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:31:01,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:01,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:01,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (161)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:02,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-16 16:31:02,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:02,388 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 171288695, now seen corresponding path program 1 times [2022-11-16 16:31:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:02,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706555116] [2022-11-16 16:31:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:02,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:02,390 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:02,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-16 16:31:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:02,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:03,128 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:03,128 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 [2022-11-16 16:31:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:03,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:03,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:03,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706555116] [2022-11-16 16:31:03,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706555116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:03,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [759747999] [2022-11-16 16:31:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:03,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:03,756 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:03,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (163)] Waiting until timeout for monitored process [2022-11-16 16:31:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:04,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:04,924 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:04,924 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 [2022-11-16 16:31:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:05,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:05,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [759747999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:05,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:05,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245431888] [2022-11-16 16:31:05,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:05,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:05,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:05,123 INFO L87 Difference]: Start difference. First operand 10802 states and 50562 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:05,407 INFO L93 Difference]: Finished difference Result 10789 states and 50495 transitions. [2022-11-16 16:31:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:31:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:05,446 INFO L225 Difference]: With dead ends: 10789 [2022-11-16 16:31:05,446 INFO L226 Difference]: Without dead ends: 10789 [2022-11-16 16:31:05,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:05,446 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:05,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10789 states. [2022-11-16 16:31:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10789 to 10789. [2022-11-16 16:31:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10789 states, 10755 states have (on average 4.695025569502557) internal successors, (50495), 10788 states have internal predecessors, (50495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10789 states to 10789 states and 50495 transitions. [2022-11-16 16:31:05,703 INFO L78 Accepts]: Start accepts. Automaton has 10789 states and 50495 transitions. Word has length 13 [2022-11-16 16:31:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:05,704 INFO L495 AbstractCegarLoop]: Abstraction has 10789 states and 50495 transitions. [2022-11-16 16:31:05,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10789 states and 50495 transitions. [2022-11-16 16:31:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:31:05,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:05,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:05,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (163)] Ended with exit code 0 [2022-11-16 16:31:05,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Ended with exit code 0 [2022-11-16 16:31:06,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:06,106 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash 167883686, now seen corresponding path program 1 times [2022-11-16 16:31:06,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980394849] [2022-11-16 16:31:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:06,107 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 [2022-11-16 16:31:06,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:06,108 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-16 16:31:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:06,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:06,782 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:06,782 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 [2022-11-16 16:31:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:07,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:07,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980394849] [2022-11-16 16:31:07,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980394849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1292458580] [2022-11-16 16:31:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:07,593 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:07,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (165)] Waiting until timeout for monitored process [2022-11-16 16:31:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:08,598 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:08,599 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 [2022-11-16 16:31:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:08,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1292458580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:08,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:08,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929578171] [2022-11-16 16:31:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:08,768 INFO L87 Difference]: Start difference. First operand 10789 states and 50495 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:08,936 INFO L93 Difference]: Finished difference Result 10785 states and 50483 transitions. [2022-11-16 16:31:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:31:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:09,107 INFO L225 Difference]: With dead ends: 10785 [2022-11-16 16:31:09,107 INFO L226 Difference]: Without dead ends: 10785 [2022-11-16 16:31:09,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:09,108 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:09,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2022-11-16 16:31:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 10785. [2022-11-16 16:31:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10751 states have (on average 4.6956562180262305) internal successors, (50483), 10784 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 50483 transitions. [2022-11-16 16:31:09,354 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 50483 transitions. Word has length 13 [2022-11-16 16:31:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:09,354 INFO L495 AbstractCegarLoop]: Abstraction has 10785 states and 50483 transitions. [2022-11-16 16:31:09,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 50483 transitions. [2022-11-16 16:31:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:09,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:09,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:09,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-16 16:31:09,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (165)] Ended with exit code 0 [2022-11-16 16:31:09,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:09,757 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 961027539, now seen corresponding path program 1 times [2022-11-16 16:31:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:09,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666533641] [2022-11-16 16:31:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:09,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:09,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:09,759 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:09,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-16 16:31:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:10,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:10,544 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:10,545 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 [2022-11-16 16:31:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:10,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:11,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:11,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666533641] [2022-11-16 16:31:11,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666533641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:11,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1563038172] [2022-11-16 16:31:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:11,366 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:11,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:11,367 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:11,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (167)] Waiting until timeout for monitored process [2022-11-16 16:31:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:12,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:12,438 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:12,439 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 [2022-11-16 16:31:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:12,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:12,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1563038172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:12,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:12,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:12,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054695549] [2022-11-16 16:31:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:12,625 INFO L87 Difference]: Start difference. First operand 10785 states and 50483 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:12,769 INFO L93 Difference]: Finished difference Result 10781 states and 50471 transitions. [2022-11-16 16:31:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:12,804 INFO L225 Difference]: With dead ends: 10781 [2022-11-16 16:31:12,805 INFO L226 Difference]: Without dead ends: 10781 [2022-11-16 16:31:12,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:12,805 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:12,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10781 states. [2022-11-16 16:31:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10781 to 10781. [2022-11-16 16:31:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10781 states, 10747 states have (on average 4.696287336000744) internal successors, (50471), 10780 states have internal predecessors, (50471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10781 states to 10781 states and 50471 transitions. [2022-11-16 16:31:13,142 INFO L78 Accepts]: Start accepts. Automaton has 10781 states and 50471 transitions. Word has length 14 [2022-11-16 16:31:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:13,142 INFO L495 AbstractCegarLoop]: Abstraction has 10781 states and 50471 transitions. [2022-11-16 16:31:13,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10781 states and 50471 transitions. [2022-11-16 16:31:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:13,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:13,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:13,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (167)] Ended with exit code 0 [2022-11-16 16:31:13,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Ended with exit code 0 [2022-11-16 16:31:13,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:13,544 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash 954688935, now seen corresponding path program 1 times [2022-11-16 16:31:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789870913] [2022-11-16 16:31:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:13,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:13,547 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:13,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-16 16:31:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 16:31:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:14,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:14,214 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:31:14,214 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 [2022-11-16 16:31:14,233 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 [2022-11-16 16:31:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:14,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:15,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789870913] [2022-11-16 16:31:15,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789870913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070464642] [2022-11-16 16:31:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:15,169 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:15,171 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:15,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (169)] Waiting until timeout for monitored process [2022-11-16 16:31:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:31:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:16,278 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:31:16,278 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 [2022-11-16 16:31:16,306 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 130 treesize of output 126 [2022-11-16 16:31:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:16,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:16,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1070464642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:16,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:16,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509653665] [2022-11-16 16:31:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:16,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:16,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:16,569 INFO L87 Difference]: Start difference. First operand 10781 states and 50471 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:16,720 INFO L93 Difference]: Finished difference Result 10776 states and 50456 transitions. [2022-11-16 16:31:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:16,754 INFO L225 Difference]: With dead ends: 10776 [2022-11-16 16:31:16,754 INFO L226 Difference]: Without dead ends: 10776 [2022-11-16 16:31:16,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:16,755 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:16,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10776 states. [2022-11-16 16:31:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10776 to 10776. [2022-11-16 16:31:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10776 states, 10742 states have (on average 4.697076894433066) internal successors, (50456), 10775 states have internal predecessors, (50456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10776 states to 10776 states and 50456 transitions. [2022-11-16 16:31:17,072 INFO L78 Accepts]: Start accepts. Automaton has 10776 states and 50456 transitions. Word has length 14 [2022-11-16 16:31:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:17,072 INFO L495 AbstractCegarLoop]: Abstraction has 10776 states and 50456 transitions. [2022-11-16 16:31:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10776 states and 50456 transitions. [2022-11-16 16:31:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:17,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:17,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:17,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (169)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:17,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Ended with exit code 0 [2022-11-16 16:31:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:17,474 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1065377883, now seen corresponding path program 1 times [2022-11-16 16:31:17,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:17,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580691710] [2022-11-16 16:31:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:17,475 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 [2022-11-16 16:31:17,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:17,476 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:17,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-16 16:31:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:17,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:18,210 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:18,210 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 [2022-11-16 16:31:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:18,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:18,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:18,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580691710] [2022-11-16 16:31:18,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580691710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:18,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338596128] [2022-11-16 16:31:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:18,841 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:18,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:18,842 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:18,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (171)] Waiting until timeout for monitored process [2022-11-16 16:31:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:19,939 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:19,939 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 [2022-11-16 16:31:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:20,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:20,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338596128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:20,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:20,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:20,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610085819] [2022-11-16 16:31:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:20,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:20,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:20,123 INFO L87 Difference]: Start difference. First operand 10776 states and 50456 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:20,264 INFO L93 Difference]: Finished difference Result 10760 states and 50380 transitions. [2022-11-16 16:31:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:20,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:20,298 INFO L225 Difference]: With dead ends: 10760 [2022-11-16 16:31:20,298 INFO L226 Difference]: Without dead ends: 10760 [2022-11-16 16:31:20,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:20,299 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:20,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10760 states. [2022-11-16 16:31:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10760 to 10760. [2022-11-16 16:31:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10726 states have (on average 4.696997948909193) internal successors, (50380), 10759 states have internal predecessors, (50380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 50380 transitions. [2022-11-16 16:31:20,669 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 50380 transitions. Word has length 14 [2022-11-16 16:31:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:20,669 INFO L495 AbstractCegarLoop]: Abstraction has 10760 states and 50380 transitions. [2022-11-16 16:31:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 50380 transitions. [2022-11-16 16:31:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:20,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:20,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:20,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (171)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:20,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-16 16:31:21,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:21,071 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1065395026, now seen corresponding path program 1 times [2022-11-16 16:31:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:21,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618703532] [2022-11-16 16:31:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:21,072 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 [2022-11-16 16:31:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:21,072 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:21,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-16 16:31:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:21,903 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:21,904 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 [2022-11-16 16:31:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:22,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:22,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:22,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618703532] [2022-11-16 16:31:22,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618703532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:22,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [285715847] [2022-11-16 16:31:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:22,626 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:22,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:22,627 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:22,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (173)] Waiting until timeout for monitored process [2022-11-16 16:31:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:23,843 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:23,844 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 [2022-11-16 16:31:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:24,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:24,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [285715847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:24,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:24,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:24,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189569197] [2022-11-16 16:31:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:24,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:24,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:24,067 INFO L87 Difference]: Start difference. First operand 10760 states and 50380 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:24,221 INFO L93 Difference]: Finished difference Result 10731 states and 50205 transitions. [2022-11-16 16:31:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:24,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:24,257 INFO L225 Difference]: With dead ends: 10731 [2022-11-16 16:31:24,257 INFO L226 Difference]: Without dead ends: 10731 [2022-11-16 16:31:24,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:24,258 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:24,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2022-11-16 16:31:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 10731. [2022-11-16 16:31:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10731 states, 10697 states have (on average 4.6933719734505) internal successors, (50205), 10730 states have internal predecessors, (50205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10731 states to 10731 states and 50205 transitions. [2022-11-16 16:31:24,728 INFO L78 Accepts]: Start accepts. Automaton has 10731 states and 50205 transitions. Word has length 14 [2022-11-16 16:31:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:24,728 INFO L495 AbstractCegarLoop]: Abstraction has 10731 states and 50205 transitions. [2022-11-16 16:31:24,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10731 states and 50205 transitions. [2022-11-16 16:31:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:24,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:24,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:24,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Ended with exit code 0 [2022-11-16 16:31:24,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (173)] Ended with exit code 0 [2022-11-16 16:31:25,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:25,130 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash 868882892, now seen corresponding path program 1 times [2022-11-16 16:31:25,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:25,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695471171] [2022-11-16 16:31:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:25,132 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 [2022-11-16 16:31:25,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:25,133 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:25,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-16 16:31:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:25,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 16:31:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:25,964 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:31:25,965 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 [2022-11-16 16:31:25,988 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 [2022-11-16 16:31:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:26,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:26,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695471171] [2022-11-16 16:31:26,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695471171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [105710321] [2022-11-16 16:31:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:26,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:26,849 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (175)] Waiting until timeout for monitored process [2022-11-16 16:31:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:27,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:31:27,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:28,118 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:31:28,119 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 [2022-11-16 16:31:28,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 143 [2022-11-16 16:31:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:28,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:28,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [105710321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:28,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:28,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92772605] [2022-11-16 16:31:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:28,364 INFO L87 Difference]: Start difference. First operand 10731 states and 50205 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:28,527 INFO L93 Difference]: Finished difference Result 10724 states and 50184 transitions. [2022-11-16 16:31:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:28,565 INFO L225 Difference]: With dead ends: 10724 [2022-11-16 16:31:28,566 INFO L226 Difference]: Without dead ends: 10724 [2022-11-16 16:31:28,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:28,566 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:28,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2022-11-16 16:31:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 10724. [2022-11-16 16:31:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10724 states, 10690 states have (on average 4.694480823199251) internal successors, (50184), 10723 states have internal predecessors, (50184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10724 states to 10724 states and 50184 transitions. [2022-11-16 16:31:28,896 INFO L78 Accepts]: Start accepts. Automaton has 10724 states and 50184 transitions. Word has length 14 [2022-11-16 16:31:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:28,897 INFO L495 AbstractCegarLoop]: Abstraction has 10724 states and 50184 transitions. [2022-11-16 16:31:28,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10724 states and 50184 transitions. [2022-11-16 16:31:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:28,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:28,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:28,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (175)] Ended with exit code 0 [2022-11-16 16:31:29,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Ended with exit code 0 [2022-11-16 16:31:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:29,299 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1912285515, now seen corresponding path program 1 times [2022-11-16 16:31:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044379073] [2022-11-16 16:31:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:29,300 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 [2022-11-16 16:31:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:29,301 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:29,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-16 16:31:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:29,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:30,021 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:30,022 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 [2022-11-16 16:31:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:30,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:30,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044379073] [2022-11-16 16:31:30,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044379073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047965689] [2022-11-16 16:31:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:30,705 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:30,706 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:30,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (177)] Waiting until timeout for monitored process [2022-11-16 16:31:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:31,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:31,913 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:31,913 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 [2022-11-16 16:31:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:32,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047965689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:32,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:32,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:32,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125636272] [2022-11-16 16:31:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:32,118 INFO L87 Difference]: Start difference. First operand 10724 states and 50184 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:32,269 INFO L93 Difference]: Finished difference Result 10698 states and 50050 transitions. [2022-11-16 16:31:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:32,305 INFO L225 Difference]: With dead ends: 10698 [2022-11-16 16:31:32,305 INFO L226 Difference]: Without dead ends: 10698 [2022-11-16 16:31:32,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:32,306 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:32,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10698 states. [2022-11-16 16:31:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10698 to 10698. [2022-11-16 16:31:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10698 states, 10664 states have (on average 4.693360840210053) internal successors, (50050), 10697 states have internal predecessors, (50050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 50050 transitions. [2022-11-16 16:31:32,665 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 50050 transitions. Word has length 14 [2022-11-16 16:31:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:32,665 INFO L495 AbstractCegarLoop]: Abstraction has 10698 states and 50050 transitions. [2022-11-16 16:31:32,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 50050 transitions. [2022-11-16 16:31:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:32,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:32,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:32,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Ended with exit code 0 [2022-11-16 16:31:32,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (177)] Ended with exit code 0 [2022-11-16 16:31:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:33,067 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1912400773, now seen corresponding path program 1 times [2022-11-16 16:31:33,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:33,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925579047] [2022-11-16 16:31:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:33,068 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 [2022-11-16 16:31:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:33,069 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:33,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-16 16:31:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:33,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:33,780 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:33,780 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 [2022-11-16 16:31:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:34,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:34,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:34,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925579047] [2022-11-16 16:31:34,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925579047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:34,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1139708428] [2022-11-16 16:31:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:34,320 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:34,321 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:34,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (179)] Waiting until timeout for monitored process [2022-11-16 16:31:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:35,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:35,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:35,476 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:35,476 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 [2022-11-16 16:31:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:35,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:35,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1139708428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:35,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:35,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:35,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732679705] [2022-11-16 16:31:35,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:35,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:35,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:35,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:35,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:35,701 INFO L87 Difference]: Start difference. First operand 10698 states and 50050 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:35,870 INFO L93 Difference]: Finished difference Result 10685 states and 49983 transitions. [2022-11-16 16:31:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:35,910 INFO L225 Difference]: With dead ends: 10685 [2022-11-16 16:31:35,910 INFO L226 Difference]: Without dead ends: 10685 [2022-11-16 16:31:35,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:35,911 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:35,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2022-11-16 16:31:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 10685. [2022-11-16 16:31:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10685 states, 10651 states have (on average 4.692798798234907) internal successors, (49983), 10684 states have internal predecessors, (49983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10685 states to 10685 states and 49983 transitions. [2022-11-16 16:31:36,314 INFO L78 Accepts]: Start accepts. Automaton has 10685 states and 49983 transitions. Word has length 14 [2022-11-16 16:31:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:36,314 INFO L495 AbstractCegarLoop]: Abstraction has 10685 states and 49983 transitions. [2022-11-16 16:31:36,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10685 states and 49983 transitions. [2022-11-16 16:31:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:36,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:36,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:36,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (179)] Ended with exit code 0 [2022-11-16 16:31:36,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-16 16:31:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:36,717 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1911754206, now seen corresponding path program 1 times [2022-11-16 16:31:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:36,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675719231] [2022-11-16 16:31:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:36,718 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 [2022-11-16 16:31:36,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:36,719 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:36,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-16 16:31:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:37,552 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:37,552 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 [2022-11-16 16:31:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:38,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:38,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675719231] [2022-11-16 16:31:38,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675719231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:38,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012096304] [2022-11-16 16:31:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:38,583 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:38,584 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (181)] Waiting until timeout for monitored process [2022-11-16 16:31:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:39,906 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:39,906 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 [2022-11-16 16:31:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:40,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:40,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1012096304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:40,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:40,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202264700] [2022-11-16 16:31:40,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:40,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:40,130 INFO L87 Difference]: Start difference. First operand 10685 states and 49983 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:40,312 INFO L93 Difference]: Finished difference Result 10681 states and 49971 transitions. [2022-11-16 16:31:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:40,355 INFO L225 Difference]: With dead ends: 10681 [2022-11-16 16:31:40,355 INFO L226 Difference]: Without dead ends: 10681 [2022-11-16 16:31:40,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:40,355 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:40,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10681 states. [2022-11-16 16:31:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10681 to 10681. [2022-11-16 16:31:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10681 states, 10647 states have (on average 4.693434770357848) internal successors, (49971), 10680 states have internal predecessors, (49971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10681 states to 10681 states and 49971 transitions. [2022-11-16 16:31:40,797 INFO L78 Accepts]: Start accepts. Automaton has 10681 states and 49971 transitions. Word has length 14 [2022-11-16 16:31:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:40,797 INFO L495 AbstractCegarLoop]: Abstraction has 10681 states and 49971 transitions. [2022-11-16 16:31:40,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10681 states and 49971 transitions. [2022-11-16 16:31:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:40,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:40,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:40,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Ended with exit code 0 [2022-11-16 16:31:41,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (181)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:41,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:41,200 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1137218769, now seen corresponding path program 1 times [2022-11-16 16:31:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:41,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941964640] [2022-11-16 16:31:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:41,202 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 [2022-11-16 16:31:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:41,203 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-16 16:31:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:42,028 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:42,029 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 [2022-11-16 16:31:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:42,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:43,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941964640] [2022-11-16 16:31:43,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941964640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1781812088] [2022-11-16 16:31:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:43,050 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:43,051 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:43,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (183)] Waiting until timeout for monitored process [2022-11-16 16:31:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:44,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:44,248 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:44,248 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 [2022-11-16 16:31:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:44,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:44,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1781812088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:44,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:44,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:44,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674815906] [2022-11-16 16:31:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:44,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:44,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:44,489 INFO L87 Difference]: Start difference. First operand 10681 states and 49971 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:44,658 INFO L93 Difference]: Finished difference Result 10673 states and 49947 transitions. [2022-11-16 16:31:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:44,874 INFO L225 Difference]: With dead ends: 10673 [2022-11-16 16:31:44,874 INFO L226 Difference]: Without dead ends: 10673 [2022-11-16 16:31:44,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:44,874 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:44,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2022-11-16 16:31:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 10673. [2022-11-16 16:31:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10673 states, 10639 states have (on average 4.694708149262149) internal successors, (49947), 10672 states have internal predecessors, (49947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10673 states to 10673 states and 49947 transitions. [2022-11-16 16:31:45,124 INFO L78 Accepts]: Start accepts. Automaton has 10673 states and 49947 transitions. Word has length 14 [2022-11-16 16:31:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:45,125 INFO L495 AbstractCegarLoop]: Abstraction has 10673 states and 49947 transitions. [2022-11-16 16:31:45,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10673 states and 49947 transitions. [2022-11-16 16:31:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:45,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:45,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:45,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (183)] Ended with exit code 0 [2022-11-16 16:31:45,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-16 16:31:45,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:45,527 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1137386820, now seen corresponding path program 1 times [2022-11-16 16:31:45,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:45,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158800713] [2022-11-16 16:31:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:45,528 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 [2022-11-16 16:31:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:45,529 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:45,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-16 16:31:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:46,244 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:46,244 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 [2022-11-16 16:31:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:46,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:46,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:46,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158800713] [2022-11-16 16:31:46,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158800713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:46,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1686244960] [2022-11-16 16:31:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:46,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:46,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:46,912 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:46,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (185)] Waiting until timeout for monitored process [2022-11-16 16:31:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:47,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:47,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:47,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:48,130 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:48,131 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 [2022-11-16 16:31:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:48,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:48,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1686244960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:48,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:48,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:48,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587050082] [2022-11-16 16:31:48,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:48,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:48,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:48,325 INFO L87 Difference]: Start difference. First operand 10673 states and 49947 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:48,465 INFO L93 Difference]: Finished difference Result 10660 states and 49880 transitions. [2022-11-16 16:31:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:48,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:48,616 INFO L225 Difference]: With dead ends: 10660 [2022-11-16 16:31:48,616 INFO L226 Difference]: Without dead ends: 10660 [2022-11-16 16:31:48,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:48,616 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:48,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10660 states. [2022-11-16 16:31:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10660 to 10660. [2022-11-16 16:31:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10660 states, 10626 states have (on average 4.694146433276868) internal successors, (49880), 10659 states have internal predecessors, (49880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10660 states to 10660 states and 49880 transitions. [2022-11-16 16:31:48,835 INFO L78 Accepts]: Start accepts. Automaton has 10660 states and 49880 transitions. Word has length 14 [2022-11-16 16:31:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:48,835 INFO L495 AbstractCegarLoop]: Abstraction has 10660 states and 49880 transitions. [2022-11-16 16:31:48,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10660 states and 49880 transitions. [2022-11-16 16:31:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:48,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:48,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:48,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (185)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:49,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Ended with exit code 0 [2022-11-16 16:31:49,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:49,238 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1140791829, now seen corresponding path program 1 times [2022-11-16 16:31:49,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603767532] [2022-11-16 16:31:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:49,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:49,240 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:49,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-16 16:31:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:49,969 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:49,970 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 [2022-11-16 16:31:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:50,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:50,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:50,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603767532] [2022-11-16 16:31:50,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603767532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:50,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [727968388] [2022-11-16 16:31:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:50,903 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (187)] Waiting until timeout for monitored process [2022-11-16 16:31:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:51,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:52,010 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:52,011 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 [2022-11-16 16:31:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:31:52,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:52,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [727968388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:52,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:52,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:31:52,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126649085] [2022-11-16 16:31:52,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:52,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:52,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:52,219 INFO L87 Difference]: Start difference. First operand 10660 states and 49880 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:52,517 INFO L93 Difference]: Finished difference Result 10656 states and 49868 transitions. [2022-11-16 16:31:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:52,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:52,569 INFO L225 Difference]: With dead ends: 10656 [2022-11-16 16:31:52,569 INFO L226 Difference]: Without dead ends: 10656 [2022-11-16 16:31:52,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:31:52,569 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:52,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10656 states. [2022-11-16 16:31:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10656 to 10656. [2022-11-16 16:31:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10622 states have (on average 4.694784409715685) internal successors, (49868), 10655 states have internal predecessors, (49868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 49868 transitions. [2022-11-16 16:31:52,845 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 49868 transitions. Word has length 14 [2022-11-16 16:31:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:52,846 INFO L495 AbstractCegarLoop]: Abstraction has 10656 states and 49868 transitions. [2022-11-16 16:31:52,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 49868 transitions. [2022-11-16 16:31:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:52,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:52,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:52,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (187)] Forceful destruction successful, exit code 0 [2022-11-16 16:31:53,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Ended with exit code 0 [2022-11-16 16:31:53,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:31:53,248 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1020025545, now seen corresponding path program 1 times [2022-11-16 16:31:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:53,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037689682] [2022-11-16 16:31:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:53,249 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 [2022-11-16 16:31:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:53,250 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:53,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-16 16:31:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:53,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:31:53,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:54,064 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:54,064 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 [2022-11-16 16:31:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:31:54,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037689682] [2022-11-16 16:31:54,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037689682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399908461] [2022-11-16 16:31:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:54,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:54,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:54,699 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:54,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (189)] Waiting until timeout for monitored process [2022-11-16 16:31:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:31:55,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:31:56,017 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:31:56,017 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 [2022-11-16 16:31:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:56,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:31:56,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [399908461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:31:56,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:31:56,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:31:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723309770] [2022-11-16 16:31:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:31:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:31:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:31:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:31:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:56,253 INFO L87 Difference]: Start difference. First operand 10656 states and 49868 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:31:56,506 INFO L93 Difference]: Finished difference Result 10607 states and 49552 transitions. [2022-11-16 16:31:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:31:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:31:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:31:56,549 INFO L225 Difference]: With dead ends: 10607 [2022-11-16 16:31:56,550 INFO L226 Difference]: Without dead ends: 10607 [2022-11-16 16:31:56,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:31:56,550 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:31:56,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:31:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10607 states. [2022-11-16 16:31:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10607 to 10607. [2022-11-16 16:31:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10573 states have (on average 4.686654686465525) internal successors, (49552), 10606 states have internal predecessors, (49552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 49552 transitions. [2022-11-16 16:31:56,794 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 49552 transitions. Word has length 14 [2022-11-16 16:31:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:31:56,794 INFO L495 AbstractCegarLoop]: Abstraction has 10607 states and 49552 transitions. [2022-11-16 16:31:56,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:31:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 49552 transitions. [2022-11-16 16:31:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:31:56,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:31:56,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:31:56,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Ended with exit code 0 [2022-11-16 16:31:57,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (189)] Ended with exit code 0 [2022-11-16 16:31:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:57,198 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:31:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:31:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1014982031, now seen corresponding path program 1 times [2022-11-16 16:31:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:31:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049912259] [2022-11-16 16:31:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:57,199 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 [2022-11-16 16:31:57,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:31:57,200 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:31:57,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-16 16:31:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:31:57,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:31:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:31:58,110 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:31:58,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 16:31:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:58,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:31:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:31:59,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:31:59,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049912259] [2022-11-16 16:31:59,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049912259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:31:59,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1705657678] [2022-11-16 16:31:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:31:59,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:31:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:31:59,174 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:31:59,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (191)] Waiting until timeout for monitored process [2022-11-16 16:32:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:32:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:32:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:32:00,434 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:32:00,434 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 [2022-11-16 16:32:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:32:00,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:32:00,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1705657678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:32:00,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:32:00,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:32:00,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058688839] [2022-11-16 16:32:00,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:32:00,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:32:00,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:00,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:32:00,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:32:00,757 INFO L87 Difference]: Start difference. First operand 10607 states and 49552 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:00,946 INFO L93 Difference]: Finished difference Result 10603 states and 49540 transitions. [2022-11-16 16:32:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:32:00,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 16:32:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:00,986 INFO L225 Difference]: With dead ends: 10603 [2022-11-16 16:32:00,987 INFO L226 Difference]: Without dead ends: 10603 [2022-11-16 16:32:00,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:32:00,987 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:00,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:32:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10603 states. [2022-11-16 16:32:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10603 to 10603. [2022-11-16 16:32:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10603 states, 10569 states have (on average 4.6872930267764215) internal successors, (49540), 10602 states have internal predecessors, (49540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10603 states to 10603 states and 49540 transitions. [2022-11-16 16:32:01,233 INFO L78 Accepts]: Start accepts. Automaton has 10603 states and 49540 transitions. Word has length 14 [2022-11-16 16:32:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:01,233 INFO L495 AbstractCegarLoop]: Abstraction has 10603 states and 49540 transitions. [2022-11-16 16:32:01,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 10603 states and 49540 transitions. [2022-11-16 16:32:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:32:01,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:01,236 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:01,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (191)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:01,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Ended with exit code 0 [2022-11-16 16:32:01,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:32:01,649 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:32:01,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1870978600, now seen corresponding path program 2 times [2022-11-16 16:32:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969875704] [2022-11-16 16:32:01,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:32:01,650 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 [2022-11-16 16:32:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:01,652 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:32:01,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-16 16:32:02,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:32:02,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:32:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:32:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:02,503 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:32:02,503 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 [2022-11-16 16:32:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:03,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:04,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:04,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969875704] [2022-11-16 16:32:04,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969875704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:04,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23381043] [2022-11-16 16:32:04,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:32:04,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:04,891 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:04,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (193)] Waiting until timeout for monitored process [2022-11-16 16:32:05,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:32:05,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:32:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:32:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:07,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23381043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706722737] [2022-11-16 16:32:07,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:32:07,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:32:07,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:32:07,473 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:32:07,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-11-16 16:32:08,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:32:08,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:32:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:32:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:08,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:08,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706722737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:08,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:32:08,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-16 16:32:08,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340251216] [2022-11-16 16:32:08,403 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:32:08,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 16:32:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:32:08,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 16:32:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:32:08,405 INFO L87 Difference]: Start difference. First operand 10603 states and 49540 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:32:45,921 INFO L93 Difference]: Finished difference Result 18925 states and 83719 transitions. [2022-11-16 16:32:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 16:32:45,923 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 16:32:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:32:46,167 INFO L225 Difference]: With dead ends: 18925 [2022-11-16 16:32:46,167 INFO L226 Difference]: Without dead ends: 18925 [2022-11-16 16:32:46,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 16:32:46,168 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1541 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 3855 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:32:46,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1541 Valid, 157 Invalid, 3902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3855 Invalid, 0 Unknown, 0 Unchecked, 25.0s Time] [2022-11-16 16:32:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18925 states. [2022-11-16 16:32:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18925 to 12140. [2022-11-16 16:32:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12140 states, 12106 states have (on average 4.621675202378985) internal successors, (55950), 12139 states have internal predecessors, (55950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12140 states to 12140 states and 55950 transitions. [2022-11-16 16:32:46,552 INFO L78 Accepts]: Start accepts. Automaton has 12140 states and 55950 transitions. Word has length 14 [2022-11-16 16:32:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:32:46,552 INFO L495 AbstractCegarLoop]: Abstraction has 12140 states and 55950 transitions. [2022-11-16 16:32:46,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:32:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12140 states and 55950 transitions. [2022-11-16 16:32:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:32:46,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:32:46,554 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 16:32:46,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (193)] Ended with exit code 0 [2022-11-16 16:32:46,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-11-16 16:32:46,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Forceful destruction successful, exit code 0 [2022-11-16 16:32:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:32:47,155 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:32:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:32:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1523875342, now seen corresponding path program 3 times [2022-11-16 16:32:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:32:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667925089] [2022-11-16 16:32:47,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:32:47,156 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 [2022-11-16 16:32:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:32:47,158 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:32:47,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-16 16:32:47,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:32:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:32:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 16:32:47,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:48,075 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:32:48,075 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 [2022-11-16 16:32:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:32:48,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:48,981 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 16:32:49,055 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 [2022-11-16 16:32:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:51,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:32:51,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667925089] [2022-11-16 16:32:51,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667925089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:51,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2040737474] [2022-11-16 16:32:51,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:32:51,869 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:32:51,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:32:51,870 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:32:51,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (196)] Waiting until timeout for monitored process [2022-11-16 16:32:53,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:32:53,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:32:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 16:32:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:32:53,989 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:32:53,989 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 [2022-11-16 16:32:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:55,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:32:55,237 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 [2022-11-16 16:32:55,264 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 [2022-11-16 16:32:55,292 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 16:32:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:32:59,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2040737474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:32:59,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289811071] [2022-11-16 16:32:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:32:59,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:32:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:32:59,771 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:32:59,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-11-16 16:33:00,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 16:33:00,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:33:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:33:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:33:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:33:02,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:33:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:33:04,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289811071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:33:04,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:33:04,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 57 [2022-11-16 16:33:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605567134] [2022-11-16 16:33:04,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:33:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 16:33:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:33:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 16:33:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 16:33:04,304 INFO L87 Difference]: Start difference. First operand 12140 states and 55950 transitions. Second operand has 58 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 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) [2022-11-16 16:33:49,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:34:24,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 16:34:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:47,891 INFO L93 Difference]: Finished difference Result 42696 states and 201012 transitions. [2022-11-16 16:34:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 16:34:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 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 [2022-11-16 16:34:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:48,091 INFO L225 Difference]: With dead ends: 42696 [2022-11-16 16:34:48,091 INFO L226 Difference]: Without dead ends: 42696 [2022-11-16 16:34:48,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=1392, Invalid=9528, Unknown=0, NotChecked=0, Total=10920 [2022-11-16 16:34:48,092 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2407 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 8891 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2407 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 10755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 8891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1797 IncrementalHoareTripleChecker+Unchecked, 61.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:48,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2407 Valid, 478 Invalid, 10755 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 8891 Invalid, 0 Unknown, 1797 Unchecked, 61.3s Time] [2022-11-16 16:34:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42696 states. [2022-11-16 16:34:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42696 to 20102. [2022-11-16 16:34:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20102 states, 20068 states have (on average 4.892465616902531) internal successors, (98182), 20101 states have internal predecessors, (98182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20102 states to 20102 states and 98182 transitions. [2022-11-16 16:34:49,144 INFO L78 Accepts]: Start accepts. Automaton has 20102 states and 98182 transitions. Word has length 14 [2022-11-16 16:34:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:49,144 INFO L495 AbstractCegarLoop]: Abstraction has 20102 states and 98182 transitions. [2022-11-16 16:34:49,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 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) [2022-11-16 16:34:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20102 states and 98182 transitions. [2022-11-16 16:34:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:34:49,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:49,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:49,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:49,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (196)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:49,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-11-16 16:34:49,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:34:49,762 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:34:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash -272919162, now seen corresponding path program 1 times [2022-11-16 16:34:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:49,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626154269] [2022-11-16 16:34:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:49,763 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 [2022-11-16 16:34:49,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:49,763 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:34:49,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-16 16:34:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:34:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:50,506 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:34:50,506 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 [2022-11-16 16:34:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:34:50,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:34:51,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:51,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626154269] [2022-11-16 16:34:51,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626154269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098735330] [2022-11-16 16:34:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:51,318 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:51,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (199)] Waiting until timeout for monitored process [2022-11-16 16:34:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:34:52,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:34:52,492 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:34:52,492 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 [2022-11-16 16:34:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:34:52,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:52,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098735330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:52,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:34:52,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:34:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794985689] [2022-11-16 16:34:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:52,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:34:52,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:34:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:34:52,684 INFO L87 Difference]: Start difference. First operand 20102 states and 98182 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:52,888 INFO L93 Difference]: Finished difference Result 20094 states and 98158 transitions. [2022-11-16 16:34:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:34:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:34:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:52,967 INFO L225 Difference]: With dead ends: 20094 [2022-11-16 16:34:52,967 INFO L226 Difference]: Without dead ends: 20094 [2022-11-16 16:34:52,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:34:52,968 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:52,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:34:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20094 states. [2022-11-16 16:34:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20094 to 20094. [2022-11-16 16:34:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20094 states, 20060 states have (on average 4.893220338983051) internal successors, (98158), 20093 states have internal predecessors, (98158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20094 states to 20094 states and 98158 transitions. [2022-11-16 16:34:53,692 INFO L78 Accepts]: Start accepts. Automaton has 20094 states and 98158 transitions. Word has length 15 [2022-11-16 16:34:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:53,692 INFO L495 AbstractCegarLoop]: Abstraction has 20094 states and 98158 transitions. [2022-11-16 16:34:53,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 20094 states and 98158 transitions. [2022-11-16 16:34:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:34:53,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:53,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:53,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (199)] Ended with exit code 0 [2022-11-16 16:34:53,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Ended with exit code 0 [2022-11-16 16:34:54,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:34:54,094 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:34:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash -272902019, now seen corresponding path program 1 times [2022-11-16 16:34:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253413238] [2022-11-16 16:34:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:54,095 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 [2022-11-16 16:34:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:54,096 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:34:54,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-16 16:34:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:54,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:34:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:54,855 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:34:54,856 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 [2022-11-16 16:34:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:34:55,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:34:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:34:55,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:34:55,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253413238] [2022-11-16 16:34:55,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253413238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:34:55,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1303569808] [2022-11-16 16:34:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:55,826 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:34:55,827 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:34:55,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (201)] Waiting until timeout for monitored process [2022-11-16 16:34:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:34:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:34:57,001 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:34:57,001 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 [2022-11-16 16:34:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:34:57,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:34:57,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1303569808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:34:57,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:34:57,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:34:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197610903] [2022-11-16 16:34:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:34:57,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:34:57,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:34:57,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:34:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:34:57,191 INFO L87 Difference]: Start difference. First operand 20094 states and 98158 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:34:57,402 INFO L93 Difference]: Finished difference Result 20081 states and 98104 transitions. [2022-11-16 16:34:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:34:57,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:34:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:34:57,483 INFO L225 Difference]: With dead ends: 20081 [2022-11-16 16:34:57,484 INFO L226 Difference]: Without dead ends: 20081 [2022-11-16 16:34:57,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:34:57,484 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:34:57,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:34:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20081 states. [2022-11-16 16:34:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20081 to 20081. [2022-11-16 16:34:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20081 states, 20047 states have (on average 4.893699805457175) internal successors, (98104), 20080 states have internal predecessors, (98104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20081 states to 20081 states and 98104 transitions. [2022-11-16 16:34:58,080 INFO L78 Accepts]: Start accepts. Automaton has 20081 states and 98104 transitions. Word has length 15 [2022-11-16 16:34:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:34:58,081 INFO L495 AbstractCegarLoop]: Abstraction has 20081 states and 98104 transitions. [2022-11-16 16:34:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:34:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20081 states and 98104 transitions. [2022-11-16 16:34:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:34:58,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:34:58,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:34:58,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Ended with exit code 0 [2022-11-16 16:34:58,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (201)] Forceful destruction successful, exit code 0 [2022-11-16 16:34:58,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:34:58,483 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:34:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:34:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -469414153, now seen corresponding path program 1 times [2022-11-16 16:34:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:34:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256445058] [2022-11-16 16:34:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:34:58,484 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 [2022-11-16 16:34:58,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:34:58,485 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:34:58,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Waiting until timeout for monitored process [2022-11-16 16:34:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:34:59,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 16:34:59,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:34:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:34:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:34:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:34:59,234 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 16:34:59,234 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 [2022-11-16 16:34:59,251 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 [2022-11-16 16:34:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:34:59,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:00,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256445058] [2022-11-16 16:35:00,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256445058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664382204] [2022-11-16 16:35:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:00,155 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:00,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (203)] Waiting until timeout for monitored process [2022-11-16 16:35:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 16:35:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:01,345 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 16:35:01,345 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 [2022-11-16 16:35:01,368 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 [2022-11-16 16:35:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:35:01,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:01,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1664382204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:01,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:01,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:35:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629283939] [2022-11-16 16:35:01,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:01,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:01,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:01,794 INFO L87 Difference]: Start difference. First operand 20081 states and 98104 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:02,009 INFO L93 Difference]: Finished difference Result 20080 states and 98102 transitions. [2022-11-16 16:35:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:02,085 INFO L225 Difference]: With dead ends: 20080 [2022-11-16 16:35:02,085 INFO L226 Difference]: Without dead ends: 20080 [2022-11-16 16:35:02,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:02,086 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:02,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20080 states. [2022-11-16 16:35:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20080 to 20080. [2022-11-16 16:35:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20080 states, 20047 states have (on average 4.893600039906221) internal successors, (98102), 20079 states have internal predecessors, (98102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20080 states to 20080 states and 98102 transitions. [2022-11-16 16:35:02,871 INFO L78 Accepts]: Start accepts. Automaton has 20080 states and 98102 transitions. Word has length 15 [2022-11-16 16:35:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 20080 states and 98102 transitions. [2022-11-16 16:35:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20080 states and 98102 transitions. [2022-11-16 16:35:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:02,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:02,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:02,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:03,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (203)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:03,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:03,273 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1333024089, now seen corresponding path program 1 times [2022-11-16 16:35:03,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:03,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469846420] [2022-11-16 16:35:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:03,274 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 [2022-11-16 16:35:03,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:03,275 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:03,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2022-11-16 16:35:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:03,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:04,093 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:04,094 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 [2022-11-16 16:35:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:04,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:04,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:04,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469846420] [2022-11-16 16:35:04,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469846420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:04,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [425993781] [2022-11-16 16:35:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:04,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:04,743 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:04,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (205)] Waiting until timeout for monitored process [2022-11-16 16:35:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:06,073 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:06,073 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 [2022-11-16 16:35:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:06,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [425993781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:06,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:06,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:35:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259494366] [2022-11-16 16:35:06,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:06,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:06,280 INFO L87 Difference]: Start difference. First operand 20080 states and 98102 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:06,484 INFO L93 Difference]: Finished difference Result 19938 states and 97234 transitions. [2022-11-16 16:35:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:06,561 INFO L225 Difference]: With dead ends: 19938 [2022-11-16 16:35:06,561 INFO L226 Difference]: Without dead ends: 19938 [2022-11-16 16:35:06,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:06,561 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:06,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2022-11-16 16:35:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19938. [2022-11-16 16:35:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19938 states, 19905 states have (on average 4.884903290630495) internal successors, (97234), 19937 states have internal predecessors, (97234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19938 states to 19938 states and 97234 transitions. [2022-11-16 16:35:07,250 INFO L78 Accepts]: Start accepts. Automaton has 19938 states and 97234 transitions. Word has length 15 [2022-11-16 16:35:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:07,250 INFO L495 AbstractCegarLoop]: Abstraction has 19938 states and 97234 transitions. [2022-11-16 16:35:07,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 19938 states and 97234 transitions. [2022-11-16 16:35:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:07,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:07,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:07,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Ended with exit code 0 [2022-11-16 16:35:07,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (205)] Ended with exit code 0 [2022-11-16 16:35:07,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:07,652 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1333139347, now seen corresponding path program 1 times [2022-11-16 16:35:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:07,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839975249] [2022-11-16 16:35:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:07,654 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:07,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Waiting until timeout for monitored process [2022-11-16 16:35:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:08,465 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:08,465 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 [2022-11-16 16:35:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:09,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839975249] [2022-11-16 16:35:09,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839975249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878368140] [2022-11-16 16:35:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:09,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:09,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:09,262 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:09,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (207)] Waiting until timeout for monitored process [2022-11-16 16:35:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:10,624 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:10,625 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 [2022-11-16 16:35:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:10,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:10,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878368140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:10,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:10,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:35:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451454331] [2022-11-16 16:35:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:10,825 INFO L87 Difference]: Start difference. First operand 19938 states and 97234 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:11,027 INFO L93 Difference]: Finished difference Result 19857 states and 96730 transitions. [2022-11-16 16:35:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:11,093 INFO L225 Difference]: With dead ends: 19857 [2022-11-16 16:35:11,093 INFO L226 Difference]: Without dead ends: 19857 [2022-11-16 16:35:11,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:11,093 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:11,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19857 states. [2022-11-16 16:35:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19857 to 19857. [2022-11-16 16:35:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19857 states, 19824 states have (on average 4.879439063761097) internal successors, (96730), 19856 states have internal predecessors, (96730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19857 states to 19857 states and 96730 transitions. [2022-11-16 16:35:11,749 INFO L78 Accepts]: Start accepts. Automaton has 19857 states and 96730 transitions. Word has length 15 [2022-11-16 16:35:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:11,749 INFO L495 AbstractCegarLoop]: Abstraction has 19857 states and 96730 transitions. [2022-11-16 16:35:11,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 19857 states and 96730 transitions. [2022-11-16 16:35:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:11,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:11,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:11,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (207)] Ended with exit code 0 [2022-11-16 16:35:11,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Ended with exit code 0 [2022-11-16 16:35:12,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:12,151 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1332492780, now seen corresponding path program 1 times [2022-11-16 16:35:12,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:12,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834566497] [2022-11-16 16:35:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:12,153 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 [2022-11-16 16:35:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:12,154 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:12,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2022-11-16 16:35:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:12,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:35:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:12,999 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:12,999 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 [2022-11-16 16:35:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:13,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:13,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834566497] [2022-11-16 16:35:13,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834566497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618795749] [2022-11-16 16:35:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:13,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:13,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:13,915 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:13,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (209)] Waiting until timeout for monitored process [2022-11-16 16:35:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:15,160 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:15,160 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 [2022-11-16 16:35:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:15,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618795749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:15,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:15,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:35:15,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216605430] [2022-11-16 16:35:15,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:15,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:15,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:15,369 INFO L87 Difference]: Start difference. First operand 19857 states and 96730 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:15,860 INFO L93 Difference]: Finished difference Result 19836 states and 96647 transitions. [2022-11-16 16:35:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:15,946 INFO L225 Difference]: With dead ends: 19836 [2022-11-16 16:35:15,946 INFO L226 Difference]: Without dead ends: 19836 [2022-11-16 16:35:15,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:15,947 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:15,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19836 states. [2022-11-16 16:35:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19836 to 19836. [2022-11-16 16:35:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19836 states, 19803 states have (on average 4.88042215825885) internal successors, (96647), 19835 states have internal predecessors, (96647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19836 states to 19836 states and 96647 transitions. [2022-11-16 16:35:16,893 INFO L78 Accepts]: Start accepts. Automaton has 19836 states and 96647 transitions. Word has length 15 [2022-11-16 16:35:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:16,893 INFO L495 AbstractCegarLoop]: Abstraction has 19836 states and 96647 transitions. [2022-11-16 16:35:16,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 19836 states and 96647 transitions. [2022-11-16 16:35:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:16,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:16,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:16,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:17,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (209)] Ended with exit code 0 [2022-11-16 16:35:17,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:17,295 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash 848691023, now seen corresponding path program 1 times [2022-11-16 16:35:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:17,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646614781] [2022-11-16 16:35:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:17,296 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 [2022-11-16 16:35:17,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:17,297 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:17,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2022-11-16 16:35:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:35:17,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:18,053 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:18,053 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 [2022-11-16 16:35:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:18,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:18,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:18,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646614781] [2022-11-16 16:35:18,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646614781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:18,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1776318330] [2022-11-16 16:35:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:18,959 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:18,960 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:18,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (211)] Waiting until timeout for monitored process [2022-11-16 16:35:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:20,157 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:20,158 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 [2022-11-16 16:35:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:20,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:20,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1776318330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:20,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:20,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:35:20,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706356372] [2022-11-16 16:35:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:20,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:20,372 INFO L87 Difference]: Start difference. First operand 19836 states and 96647 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:20,603 INFO L93 Difference]: Finished difference Result 19824 states and 96611 transitions. [2022-11-16 16:35:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:20,996 INFO L225 Difference]: With dead ends: 19824 [2022-11-16 16:35:20,996 INFO L226 Difference]: Without dead ends: 19824 [2022-11-16 16:35:20,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:20,997 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:20,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19824 states. [2022-11-16 16:35:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19824 to 19824. [2022-11-16 16:35:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19824 states, 19791 states have (on average 4.881562326309939) internal successors, (96611), 19823 states have internal predecessors, (96611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19824 states to 19824 states and 96611 transitions. [2022-11-16 16:35:21,412 INFO L78 Accepts]: Start accepts. Automaton has 19824 states and 96611 transitions. Word has length 15 [2022-11-16 16:35:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:21,412 INFO L495 AbstractCegarLoop]: Abstraction has 19824 states and 96611 transitions. [2022-11-16 16:35:21,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 19824 states and 96611 transitions. [2022-11-16 16:35:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:21,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:21,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:21,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (211)] Ended with exit code 0 [2022-11-16 16:35:21,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Ended with exit code 0 [2022-11-16 16:35:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:21,814 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash 848522972, now seen corresponding path program 1 times [2022-11-16 16:35:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914503733] [2022-11-16 16:35:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:21,815 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 [2022-11-16 16:35:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:21,816 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:21,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Waiting until timeout for monitored process [2022-11-16 16:35:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:22,592 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:22,593 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 [2022-11-16 16:35:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:23,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914503733] [2022-11-16 16:35:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914503733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104573692] [2022-11-16 16:35:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:23,401 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:23,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (213)] Waiting until timeout for monitored process [2022-11-16 16:35:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:24,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:24,681 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:24,681 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 [2022-11-16 16:35:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:24,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:24,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104573692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:24,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:24,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:35:24,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088329981] [2022-11-16 16:35:24,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:24,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:24,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:24,867 INFO L87 Difference]: Start difference. First operand 19824 states and 96611 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:25,086 INFO L93 Difference]: Finished difference Result 19803 states and 96502 transitions. [2022-11-16 16:35:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:25,161 INFO L225 Difference]: With dead ends: 19803 [2022-11-16 16:35:25,161 INFO L226 Difference]: Without dead ends: 19803 [2022-11-16 16:35:25,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:25,162 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:25,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19803 states. [2022-11-16 16:35:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19803 to 19803. [2022-11-16 16:35:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19803 states, 19770 states have (on average 4.8812341932220535) internal successors, (96502), 19802 states have internal predecessors, (96502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19803 states to 19803 states and 96502 transitions. [2022-11-16 16:35:25,903 INFO L78 Accepts]: Start accepts. Automaton has 19803 states and 96502 transitions. Word has length 15 [2022-11-16 16:35:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:25,904 INFO L495 AbstractCegarLoop]: Abstraction has 19803 states and 96502 transitions. [2022-11-16 16:35:25,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 19803 states and 96502 transitions. [2022-11-16 16:35:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:25,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:25,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:25,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (213)] Ended with exit code 0 [2022-11-16 16:35:26,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:26,308 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 845117963, now seen corresponding path program 1 times [2022-11-16 16:35:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424466813] [2022-11-16 16:35:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:26,309 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 [2022-11-16 16:35:26,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:26,310 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:26,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Waiting until timeout for monitored process [2022-11-16 16:35:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:26,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:35:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:27,130 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:27,131 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 [2022-11-16 16:35:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:27,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:28,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424466813] [2022-11-16 16:35:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424466813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13941894] [2022-11-16 16:35:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:28,057 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:28,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:28,058 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:28,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (215)] Waiting until timeout for monitored process [2022-11-16 16:35:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:29,256 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:29,256 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 [2022-11-16 16:35:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:29,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:29,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13941894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:29,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:29,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:35:29,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693271951] [2022-11-16 16:35:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:29,450 INFO L87 Difference]: Start difference. First operand 19803 states and 96502 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:29,909 INFO L93 Difference]: Finished difference Result 19797 states and 96484 transitions. [2022-11-16 16:35:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:29,983 INFO L225 Difference]: With dead ends: 19797 [2022-11-16 16:35:29,983 INFO L226 Difference]: Without dead ends: 19797 [2022-11-16 16:35:29,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:29,984 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:29,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19797 states. [2022-11-16 16:35:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19797 to 19797. [2022-11-16 16:35:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19797 states, 19764 states have (on average 4.88180530257033) internal successors, (96484), 19796 states have internal predecessors, (96484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19797 states to 19797 states and 96484 transitions. [2022-11-16 16:35:30,830 INFO L78 Accepts]: Start accepts. Automaton has 19797 states and 96484 transitions. Word has length 15 [2022-11-16 16:35:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:30,831 INFO L495 AbstractCegarLoop]: Abstraction has 19797 states and 96484 transitions. [2022-11-16 16:35:30,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19797 states and 96484 transitions. [2022-11-16 16:35:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:30,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:30,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (215)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:31,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Ended with exit code 0 [2022-11-16 16:35:31,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:31,233 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash -894209756, now seen corresponding path program 1 times [2022-11-16 16:35:31,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:31,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135662017] [2022-11-16 16:35:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:31,234 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 [2022-11-16 16:35:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:31,235 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:31,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Waiting until timeout for monitored process [2022-11-16 16:35:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:32,041 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:32,041 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 [2022-11-16 16:35:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:32,596 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135662017] [2022-11-16 16:35:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135662017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515567278] [2022-11-16 16:35:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:32,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:32,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:32,598 INFO L229 MonitoredProcess]: Starting monitored process 217 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:32,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (217)] Waiting until timeout for monitored process [2022-11-16 16:35:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:33,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:33,875 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:33,875 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 [2022-11-16 16:35:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:34,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:34,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515567278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:34,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:34,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:35:34,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825358802] [2022-11-16 16:35:34,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:34,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:34,084 INFO L87 Difference]: Start difference. First operand 19797 states and 96484 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:34,303 INFO L93 Difference]: Finished difference Result 19716 states and 95972 transitions. [2022-11-16 16:35:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:34,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:34,392 INFO L225 Difference]: With dead ends: 19716 [2022-11-16 16:35:34,392 INFO L226 Difference]: Without dead ends: 19716 [2022-11-16 16:35:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:34,392 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:34,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19716 states. [2022-11-16 16:35:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19716 to 19716. [2022-11-16 16:35:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19716 states, 19683 states have (on average 4.875882741452014) internal successors, (95972), 19715 states have internal predecessors, (95972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19716 states to 19716 states and 95972 transitions. [2022-11-16 16:35:35,090 INFO L78 Accepts]: Start accepts. Automaton has 19716 states and 95972 transitions. Word has length 15 [2022-11-16 16:35:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:35,090 INFO L495 AbstractCegarLoop]: Abstraction has 19716 states and 95972 transitions. [2022-11-16 16:35:35,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 19716 states and 95972 transitions. [2022-11-16 16:35:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:35,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:35,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:35,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (217)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:35,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Ended with exit code 0 [2022-11-16 16:35:35,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,216 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:35,507 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash -899253270, now seen corresponding path program 1 times [2022-11-16 16:35:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:35,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139450362] [2022-11-16 16:35:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:35,509 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 [2022-11-16 16:35:35,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:35,510 INFO L229 MonitoredProcess]: Starting monitored process 218 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:35,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Waiting until timeout for monitored process [2022-11-16 16:35:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:35:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:36,295 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:36,296 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 [2022-11-16 16:35:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:36,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:37,204 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139450362] [2022-11-16 16:35:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139450362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:37,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497203829] [2022-11-16 16:35:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:37,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:37,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:37,205 INFO L229 MonitoredProcess]: Starting monitored process 219 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:37,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (219)] Waiting until timeout for monitored process [2022-11-16 16:35:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:38,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:38,617 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:38,618 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 [2022-11-16 16:35:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:38,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:38,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497203829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:38,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:38,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:35:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249315686] [2022-11-16 16:35:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:38,824 INFO L87 Difference]: Start difference. First operand 19716 states and 95972 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:39,095 INFO L93 Difference]: Finished difference Result 19710 states and 95954 transitions. [2022-11-16 16:35:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:39,191 INFO L225 Difference]: With dead ends: 19710 [2022-11-16 16:35:39,191 INFO L226 Difference]: Without dead ends: 19710 [2022-11-16 16:35:39,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:39,192 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:39,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19710 states. [2022-11-16 16:35:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19710 to 19710. [2022-11-16 16:35:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19710 states, 19677 states have (on average 4.876454744117497) internal successors, (95954), 19709 states have internal predecessors, (95954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19710 states to 19710 states and 95954 transitions. [2022-11-16 16:35:39,917 INFO L78 Accepts]: Start accepts. Automaton has 19710 states and 95954 transitions. Word has length 15 [2022-11-16 16:35:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:39,918 INFO L495 AbstractCegarLoop]: Abstraction has 19710 states and 95954 transitions. [2022-11-16 16:35:39,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19710 states and 95954 transitions. [2022-11-16 16:35:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:39,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:39,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:39,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (219)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:40,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Ended with exit code 0 [2022-11-16 16:35:40,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,218 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:40,320 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1561004537, now seen corresponding path program 1 times [2022-11-16 16:35:40,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:40,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180268762] [2022-11-16 16:35:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:40,322 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 [2022-11-16 16:35:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:40,323 INFO L229 MonitoredProcess]: Starting monitored process 220 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:40,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Waiting until timeout for monitored process [2022-11-16 16:35:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:35:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:41,217 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:41,217 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 [2022-11-16 16:35:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:41,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:42,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180268762] [2022-11-16 16:35:42,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180268762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [152111576] [2022-11-16 16:35:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:42,082 INFO L229 MonitoredProcess]: Starting monitored process 221 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:42,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (221)] Waiting until timeout for monitored process [2022-11-16 16:35:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:43,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:43,451 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:43,451 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 [2022-11-16 16:35:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:43,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:43,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [152111576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:43,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:43,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:35:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126475528] [2022-11-16 16:35:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:43,671 INFO L87 Difference]: Start difference. First operand 19710 states and 95954 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:44,129 INFO L93 Difference]: Finished difference Result 19689 states and 95866 transitions. [2022-11-16 16:35:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:44,213 INFO L225 Difference]: With dead ends: 19689 [2022-11-16 16:35:44,213 INFO L226 Difference]: Without dead ends: 19689 [2022-11-16 16:35:44,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:35:44,214 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:44,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19689 states. [2022-11-16 16:35:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19689 to 19689. [2022-11-16 16:35:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19689 states, 19656 states have (on average 4.877187627187627) internal successors, (95866), 19688 states have internal predecessors, (95866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19689 states to 19689 states and 95866 transitions. [2022-11-16 16:35:44,734 INFO L78 Accepts]: Start accepts. Automaton has 19689 states and 95866 transitions. Word has length 15 [2022-11-16 16:35:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:44,734 INFO L495 AbstractCegarLoop]: Abstraction has 19689 states and 95866 transitions. [2022-11-16 16:35:44,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 19689 states and 95866 transitions. [2022-11-16 16:35:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:44,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:44,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:44,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Forceful destruction successful, exit code 0 [2022-11-16 16:35:44,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (221)] Ended with exit code 0 [2022-11-16 16:35:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,221 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:45,150 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1556020605, now seen corresponding path program 1 times [2022-11-16 16:35:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:45,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553244283] [2022-11-16 16:35:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:45,151 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 [2022-11-16 16:35:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:45,152 INFO L229 MonitoredProcess]: Starting monitored process 222 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:45,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Waiting until timeout for monitored process [2022-11-16 16:35:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:46,055 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:46,055 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 [2022-11-16 16:35:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:46,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:46,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:46,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553244283] [2022-11-16 16:35:46,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553244283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:46,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698864533] [2022-11-16 16:35:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:35:46,905 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:46,906 INFO L229 MonitoredProcess]: Starting monitored process 223 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:46,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (223)] Waiting until timeout for monitored process [2022-11-16 16:35:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:35:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:35:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:35:48,188 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:35:48,189 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 [2022-11-16 16:35:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:35:48,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:35:48,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1698864533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:35:48,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:35:48,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:35:48,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105340636] [2022-11-16 16:35:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:35:48,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:35:48,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:48,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:35:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:48,408 INFO L87 Difference]: Start difference. First operand 19689 states and 95866 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:35:48,668 INFO L93 Difference]: Finished difference Result 19668 states and 95781 transitions. [2022-11-16 16:35:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:35:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:35:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:35:48,748 INFO L225 Difference]: With dead ends: 19668 [2022-11-16 16:35:48,749 INFO L226 Difference]: Without dead ends: 19668 [2022-11-16 16:35:48,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:35:48,749 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:35:48,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:35:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19668 states. [2022-11-16 16:35:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19668 to 19668. [2022-11-16 16:35:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19668 states, 19635 states have (on average 4.87807486631016) internal successors, (95781), 19667 states have internal predecessors, (95781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19668 states to 19668 states and 95781 transitions. [2022-11-16 16:35:49,412 INFO L78 Accepts]: Start accepts. Automaton has 19668 states and 95781 transitions. Word has length 15 [2022-11-16 16:35:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:35:49,413 INFO L495 AbstractCegarLoop]: Abstraction has 19668 states and 95781 transitions. [2022-11-16 16:35:49,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:35:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 19668 states and 95781 transitions. [2022-11-16 16:35:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:35:49,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:35:49,415 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:35:49,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (223)] Ended with exit code 0 [2022-11-16 16:35:49,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Ended with exit code 0 [2022-11-16 16:35:49,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,222 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:35:49,815 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:35:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:35:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1878517204, now seen corresponding path program 2 times [2022-11-16 16:35:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:35:49,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923919848] [2022-11-16 16:35:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:35:49,816 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 [2022-11-16 16:35:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:35:49,817 INFO L229 MonitoredProcess]: Starting monitored process 224 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:35:49,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Waiting until timeout for monitored process [2022-11-16 16:35:50,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:35:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:35:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 16:35:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:50,634 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:35:50,634 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 [2022-11-16 16:35:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:51,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:53,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:35:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923919848] [2022-11-16 16:35:53,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923919848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1141712278] [2022-11-16 16:35:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:35:53,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:35:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:35:53,233 INFO L229 MonitoredProcess]: Starting monitored process 225 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:35:53,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (225)] Waiting until timeout for monitored process [2022-11-16 16:35:54,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:35:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:35:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:54,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:35:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1141712278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588311782] [2022-11-16 16:35:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:35:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:35:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:35:55,755 INFO L229 MonitoredProcess]: Starting monitored process 226 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:35:55,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-11-16 16:35:56,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:35:56,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:35:56,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:35:56,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:35:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:35:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:35:57,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588311782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:35:57,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:35:57,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 44 [2022-11-16 16:35:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450563959] [2022-11-16 16:35:57,868 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:35:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 16:35:57,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:35:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 16:35:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=1508, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 16:35:57,870 INFO L87 Difference]: Start difference. First operand 19668 states and 95781 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:36:41,614 INFO L93 Difference]: Finished difference Result 36277 states and 167399 transitions. [2022-11-16 16:36:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 16:36:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2022-11-16 16:36:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:36:41,747 INFO L225 Difference]: With dead ends: 36277 [2022-11-16 16:36:41,747 INFO L226 Difference]: Without dead ends: 36277 [2022-11-16 16:36:41,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1428, Invalid=4424, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 16:36:41,748 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2177 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4782 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2177 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:36:41,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2177 Valid, 22 Invalid, 4847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4782 Invalid, 0 Unknown, 0 Unchecked, 27.1s Time] [2022-11-16 16:36:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36277 states. [2022-11-16 16:36:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36277 to 24427. [2022-11-16 16:36:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24427 states, 24394 states have (on average 4.935967860949414) internal successors, (120408), 24426 states have internal predecessors, (120408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24427 states to 24427 states and 120408 transitions. [2022-11-16 16:36:42,581 INFO L78 Accepts]: Start accepts. Automaton has 24427 states and 120408 transitions. Word has length 15 [2022-11-16 16:36:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:36:42,581 INFO L495 AbstractCegarLoop]: Abstraction has 24427 states and 120408 transitions. [2022-11-16 16:36:42,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:36:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24427 states and 120408 transitions. [2022-11-16 16:36:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:36:42,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:36:42,584 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:36:42,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:42,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Forceful destruction successful, exit code 0 [2022-11-16 16:36:42,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (225)] Ended with exit code 0 [2022-11-16 16:36:43,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,224 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,225 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:43,185 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:36:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:36:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2064617624, now seen corresponding path program 1 times [2022-11-16 16:36:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:36:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143165342] [2022-11-16 16:36:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:43,186 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 [2022-11-16 16:36:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:36:43,187 INFO L229 MonitoredProcess]: Starting monitored process 227 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:36:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Waiting until timeout for monitored process [2022-11-16 16:36:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 16:36:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:44,230 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:36:44,231 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 [2022-11-16 16:36:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:44,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:36:46,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:36:46,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143165342] [2022-11-16 16:36:46,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143165342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:46,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [765169069] [2022-11-16 16:36:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:46,893 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:36:46,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:36:46,894 INFO L229 MonitoredProcess]: Starting monitored process 228 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:36:46,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (228)] Waiting until timeout for monitored process [2022-11-16 16:36:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:47,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 16:36:47,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:36:48,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:36:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [765169069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639980230] [2022-11-16 16:36:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:36:49,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:36:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:36:49,963 INFO L229 MonitoredProcess]: Starting monitored process 229 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:36:49,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-11-16 16:36:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:36:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 16:36:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:36:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:36:51,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:36:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:36:52,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639980230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:36:52,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:36:52,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 10, 10] total 52 [2022-11-16 16:36:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451174720] [2022-11-16 16:36:52,355 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:36:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 16:36:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:36:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 16:36:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2212, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 16:36:52,357 INFO L87 Difference]: Start difference. First operand 24427 states and 120408 transitions. Second operand has 53 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:45,757 INFO L93 Difference]: Finished difference Result 35833 states and 169873 transitions. [2022-11-16 16:37:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 16:37:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:37:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:45,931 INFO L225 Difference]: With dead ends: 35833 [2022-11-16 16:37:45,931 INFO L226 Difference]: Without dead ends: 35833 [2022-11-16 16:37:45,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=1328, Invalid=5314, Unknown=0, NotChecked=0, Total=6642 [2022-11-16 16:37:45,932 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2027 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 6397 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 6460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 6397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:45,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2027 Valid, 288 Invalid, 6460 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [63 Valid, 6397 Invalid, 0 Unknown, 0 Unchecked, 36.3s Time] [2022-11-16 16:37:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35833 states. [2022-11-16 16:37:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35833 to 21470. [2022-11-16 16:37:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21470 states, 21437 states have (on average 4.769650604095722) internal successors, (102247), 21469 states have internal predecessors, (102247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21470 states to 21470 states and 102247 transitions. [2022-11-16 16:37:46,783 INFO L78 Accepts]: Start accepts. Automaton has 21470 states and 102247 transitions. Word has length 15 [2022-11-16 16:37:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:46,783 INFO L495 AbstractCegarLoop]: Abstraction has 21470 states and 102247 transitions. [2022-11-16 16:37:46,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21470 states and 102247 transitions. [2022-11-16 16:37:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:37:46,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:46,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:46,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Ended with exit code 0 [2022-11-16 16:37:46,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-11-16 16:37:47,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (228)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:47,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,229 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,228 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:47,386 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:37:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash 129440476, now seen corresponding path program 1 times [2022-11-16 16:37:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:47,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277957803] [2022-11-16 16:37:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:47,387 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 [2022-11-16 16:37:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:47,388 INFO L229 MonitoredProcess]: Starting monitored process 230 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:37:47,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Waiting until timeout for monitored process [2022-11-16 16:37:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:37:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:48,262 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:37:48,262 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 [2022-11-16 16:37:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:37:48,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:37:49,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:49,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277957803] [2022-11-16 16:37:49,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277957803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:49,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [964139250] [2022-11-16 16:37:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:49,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:49,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:49,070 INFO L229 MonitoredProcess]: Starting monitored process 231 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:49,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (231)] Waiting until timeout for monitored process [2022-11-16 16:37:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:37:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:37:50,444 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:37:50,445 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 [2022-11-16 16:37:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:37:50,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:37:50,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [964139250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:37:50,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:37:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:37:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246941343] [2022-11-16 16:37:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:37:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:37:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:37:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:37:50,649 INFO L87 Difference]: Start difference. First operand 21470 states and 102247 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:51,149 INFO L93 Difference]: Finished difference Result 21438 states and 102117 transitions. [2022-11-16 16:37:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:37:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:37:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:51,237 INFO L225 Difference]: With dead ends: 21438 [2022-11-16 16:37:51,237 INFO L226 Difference]: Without dead ends: 21438 [2022-11-16 16:37:51,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:37:51,238 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:51,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:37:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21438 states. [2022-11-16 16:37:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21438 to 21438. [2022-11-16 16:37:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21438 states, 21405 states have (on average 4.770707778556412) internal successors, (102117), 21437 states have internal predecessors, (102117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21438 states to 21438 states and 102117 transitions. [2022-11-16 16:37:52,025 INFO L78 Accepts]: Start accepts. Automaton has 21438 states and 102117 transitions. Word has length 16 [2022-11-16 16:37:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:52,025 INFO L495 AbstractCegarLoop]: Abstraction has 21438 states and 102117 transitions. [2022-11-16 16:37:52,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 21438 states and 102117 transitions. [2022-11-16 16:37:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:37:52,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:52,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:52,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Ended with exit code 0 [2022-11-16 16:37:52,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (231)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,231 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:52,428 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:37:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash 129325218, now seen corresponding path program 1 times [2022-11-16 16:37:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:52,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183659841] [2022-11-16 16:37:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:52,430 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 [2022-11-16 16:37:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:52,431 INFO L229 MonitoredProcess]: Starting monitored process 232 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:37:52,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Waiting until timeout for monitored process [2022-11-16 16:37:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:37:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:53,274 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:37:53,275 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 [2022-11-16 16:37:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:37:53,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:37:54,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183659841] [2022-11-16 16:37:54,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183659841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1995131464] [2022-11-16 16:37:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:54,104 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:54,105 INFO L229 MonitoredProcess]: Starting monitored process 233 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:54,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (233)] Waiting until timeout for monitored process [2022-11-16 16:37:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:37:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:37:55,624 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:37:55,624 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 [2022-11-16 16:37:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:37:55,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:37:55,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1995131464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:37:55,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:37:55,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:37:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677770471] [2022-11-16 16:37:55,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:37:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:37:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:37:55,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:37:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:37:55,827 INFO L87 Difference]: Start difference. First operand 21438 states and 102117 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:37:56,055 INFO L93 Difference]: Finished difference Result 21423 states and 102059 transitions. [2022-11-16 16:37:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:37:56,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:37:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:37:56,150 INFO L225 Difference]: With dead ends: 21423 [2022-11-16 16:37:56,150 INFO L226 Difference]: Without dead ends: 21423 [2022-11-16 16:37:56,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:37:56,151 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:37:56,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:37:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21423 states. [2022-11-16 16:37:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21423 to 21423. [2022-11-16 16:37:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21423 states, 21390 states have (on average 4.771341748480598) internal successors, (102059), 21422 states have internal predecessors, (102059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21423 states to 21423 states and 102059 transitions. [2022-11-16 16:37:57,047 INFO L78 Accepts]: Start accepts. Automaton has 21423 states and 102059 transitions. Word has length 16 [2022-11-16 16:37:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:37:57,047 INFO L495 AbstractCegarLoop]: Abstraction has 21423 states and 102059 transitions. [2022-11-16 16:37:57,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:37:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 21423 states and 102059 transitions. [2022-11-16 16:37:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:37:57,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:37:57,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:37:57,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Ended with exit code 0 [2022-11-16 16:37:57,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (233)] Forceful destruction successful, exit code 0 [2022-11-16 16:37:57,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,233 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:57,451 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:37:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:37:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash 129971785, now seen corresponding path program 1 times [2022-11-16 16:37:57,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:37:57,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033276783] [2022-11-16 16:37:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:57,451 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 [2022-11-16 16:37:57,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:37:57,452 INFO L229 MonitoredProcess]: Starting monitored process 234 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:37:57,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Waiting until timeout for monitored process [2022-11-16 16:37:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:37:58,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:37:58,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:37:58,298 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:37:58,299 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 [2022-11-16 16:37:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:37:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:37:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:37:59,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:37:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033276783] [2022-11-16 16:37:59,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033276783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:37:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629014125] [2022-11-16 16:37:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:37:59,377 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:37:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:37:59,383 INFO L229 MonitoredProcess]: Starting monitored process 235 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:37:59,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (235)] Waiting until timeout for monitored process [2022-11-16 16:38:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:38:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:38:00,719 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:38:00,719 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 [2022-11-16 16:38:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:38:00,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:00,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629014125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:00,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:38:00,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:38:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740121494] [2022-11-16 16:38:00,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:00,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:00,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:00,961 INFO L87 Difference]: Start difference. First operand 21423 states and 102059 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:01,169 INFO L93 Difference]: Finished difference Result 21419 states and 102051 transitions. [2022-11-16 16:38:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:38:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:01,244 INFO L225 Difference]: With dead ends: 21419 [2022-11-16 16:38:01,244 INFO L226 Difference]: Without dead ends: 21419 [2022-11-16 16:38:01,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:01,244 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:01,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:38:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21419 states. [2022-11-16 16:38:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21419 to 21419. [2022-11-16 16:38:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21419 states, 21386 states have (on average 4.771860095389507) internal successors, (102051), 21418 states have internal predecessors, (102051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21419 states to 21419 states and 102051 transitions. [2022-11-16 16:38:01,941 INFO L78 Accepts]: Start accepts. Automaton has 21419 states and 102051 transitions. Word has length 16 [2022-11-16 16:38:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:01,941 INFO L495 AbstractCegarLoop]: Abstraction has 21419 states and 102051 transitions. [2022-11-16 16:38:01,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21419 states and 102051 transitions. [2022-11-16 16:38:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:38:01,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:01,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:01,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (235)] Ended with exit code 0 [2022-11-16 16:38:02,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Ended with exit code 0 [2022-11-16 16:38:02,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,234 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:38:02,345 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:38:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:02,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1625926045, now seen corresponding path program 1 times [2022-11-16 16:38:02,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:02,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81409806] [2022-11-16 16:38:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:02,346 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 [2022-11-16 16:38:02,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:02,347 INFO L229 MonitoredProcess]: Starting monitored process 236 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:38:02,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Waiting until timeout for monitored process [2022-11-16 16:38:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:02,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:38:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:03,205 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:38:03,205 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 [2022-11-16 16:38:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:03,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:04,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81409806] [2022-11-16 16:38:04,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81409806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661983066] [2022-11-16 16:38:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:04,254 INFO L229 MonitoredProcess]: Starting monitored process 237 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:04,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (237)] Waiting until timeout for monitored process [2022-11-16 16:38:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:38:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:05,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:38:05,623 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:38:05,623 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 [2022-11-16 16:38:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:38:06,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:06,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [661983066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:06,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:38:06,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:38:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250090216] [2022-11-16 16:38:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:06,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:06,002 INFO L87 Difference]: Start difference. First operand 21419 states and 102051 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:06,199 INFO L93 Difference]: Finished difference Result 21381 states and 101903 transitions. [2022-11-16 16:38:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:38:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:06,281 INFO L225 Difference]: With dead ends: 21381 [2022-11-16 16:38:06,281 INFO L226 Difference]: Without dead ends: 21381 [2022-11-16 16:38:06,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:06,282 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:06,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:38:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21381 states. [2022-11-16 16:38:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21381 to 21381. [2022-11-16 16:38:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21348 states have (on average 4.77342139778902) internal successors, (101903), 21380 states have internal predecessors, (101903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 101903 transitions. [2022-11-16 16:38:07,124 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 101903 transitions. Word has length 16 [2022-11-16 16:38:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:07,125 INFO L495 AbstractCegarLoop]: Abstraction has 21381 states and 101903 transitions. [2022-11-16 16:38:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 101903 transitions. [2022-11-16 16:38:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:38:07,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:07,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:07,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (237)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:07,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:07,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,236 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:38:07,528 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:38:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1625757994, now seen corresponding path program 1 times [2022-11-16 16:38:07,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:07,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028785220] [2022-11-16 16:38:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:07,529 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 [2022-11-16 16:38:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:07,530 INFO L229 MonitoredProcess]: Starting monitored process 238 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:38:07,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Waiting until timeout for monitored process [2022-11-16 16:38:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:38:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:08,401 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:38:08,401 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 [2022-11-16 16:38:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:09,116 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028785220] [2022-11-16 16:38:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028785220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970633802] [2022-11-16 16:38:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:09,118 INFO L229 MonitoredProcess]: Starting monitored process 239 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:09,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (239)] Waiting until timeout for monitored process [2022-11-16 16:38:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:38:10,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:38:10,532 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:38:10,532 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 [2022-11-16 16:38:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:10,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:10,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [970633802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:10,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:38:10,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:38:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918837355] [2022-11-16 16:38:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:38:10,733 INFO L87 Difference]: Start difference. First operand 21381 states and 101903 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:10,981 INFO L93 Difference]: Finished difference Result 21307 states and 101450 transitions. [2022-11-16 16:38:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:38:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:11,072 INFO L225 Difference]: With dead ends: 21307 [2022-11-16 16:38:11,073 INFO L226 Difference]: Without dead ends: 21307 [2022-11-16 16:38:11,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:38:11,073 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:11,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:38:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21307 states. [2022-11-16 16:38:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21307 to 21307. [2022-11-16 16:38:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21307 states, 21274 states have (on average 4.7687317852778035) internal successors, (101450), 21306 states have internal predecessors, (101450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21307 states to 21307 states and 101450 transitions. [2022-11-16 16:38:11,858 INFO L78 Accepts]: Start accepts. Automaton has 21307 states and 101450 transitions. Word has length 16 [2022-11-16 16:38:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:11,858 INFO L495 AbstractCegarLoop]: Abstraction has 21307 states and 101450 transitions. [2022-11-16 16:38:11,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 21307 states and 101450 transitions. [2022-11-16 16:38:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:38:11,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:11,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:11,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Ended with exit code 0 [2022-11-16 16:38:12,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (239)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:12,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,239 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:12,263 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:38:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:12,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1622352985, now seen corresponding path program 1 times [2022-11-16 16:38:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:12,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996109581] [2022-11-16 16:38:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:12,264 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 [2022-11-16 16:38:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:12,265 INFO L229 MonitoredProcess]: Starting monitored process 240 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:38:12,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Waiting until timeout for monitored process [2022-11-16 16:38:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:12,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:38:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:13,136 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:38:13,137 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 [2022-11-16 16:38:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:13,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:14,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996109581] [2022-11-16 16:38:14,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996109581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [935590389] [2022-11-16 16:38:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:14,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:14,340 INFO L229 MonitoredProcess]: Starting monitored process 241 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:14,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (241)] Waiting until timeout for monitored process [2022-11-16 16:38:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:38:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:15,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:38:15,757 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:38:15,758 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 [2022-11-16 16:38:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:38:16,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:16,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [935590389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:16,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:38:16,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:38:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013160941] [2022-11-16 16:38:16,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:16,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:16,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:16,004 INFO L87 Difference]: Start difference. First operand 21307 states and 101450 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:16,245 INFO L93 Difference]: Finished difference Result 21287 states and 101373 transitions. [2022-11-16 16:38:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:38:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:16,332 INFO L225 Difference]: With dead ends: 21287 [2022-11-16 16:38:16,332 INFO L226 Difference]: Without dead ends: 21287 [2022-11-16 16:38:16,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:16,332 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:16,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:38:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2022-11-16 16:38:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 21287. [2022-11-16 16:38:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21287 states, 21254 states have (on average 4.769596311282582) internal successors, (101373), 21286 states have internal predecessors, (101373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21287 states to 21287 states and 101373 transitions. [2022-11-16 16:38:17,049 INFO L78 Accepts]: Start accepts. Automaton has 21287 states and 101373 transitions. Word has length 16 [2022-11-16 16:38:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:17,049 INFO L495 AbstractCegarLoop]: Abstraction has 21287 states and 101373 transitions. [2022-11-16 16:38:17,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21287 states and 101373 transitions. [2022-11-16 16:38:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:38:17,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:17,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:17,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Ended with exit code 0 [2022-11-16 16:38:17,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (241)] Ended with exit code 0 [2022-11-16 16:38:17,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,241 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:17,452 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:38:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 539451652, now seen corresponding path program 1 times [2022-11-16 16:38:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618361889] [2022-11-16 16:38:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:17,453 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 [2022-11-16 16:38:17,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:17,454 INFO L229 MonitoredProcess]: Starting monitored process 242 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:38:17,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Waiting until timeout for monitored process [2022-11-16 16:38:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 16:38:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:18,355 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:38:18,355 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 [2022-11-16 16:38:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:18,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:38:18,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618361889] [2022-11-16 16:38:18,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618361889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234965802] [2022-11-16 16:38:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:18,955 INFO L229 MonitoredProcess]: Starting monitored process 243 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:18,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (243)] Waiting until timeout for monitored process [2022-11-16 16:38:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:38:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:20,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:38:20,399 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:38:20,399 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 [2022-11-16 16:38:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:20,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234965802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:20,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:38:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-16 16:38:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643274233] [2022-11-16 16:38:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:38:20,620 INFO L87 Difference]: Start difference. First operand 21287 states and 101373 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:21,072 INFO L93 Difference]: Finished difference Result 21187 states and 100745 transitions. [2022-11-16 16:38:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:21,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:38:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:21,160 INFO L225 Difference]: With dead ends: 21187 [2022-11-16 16:38:21,160 INFO L226 Difference]: Without dead ends: 21187 [2022-11-16 16:38:21,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 16:38:21,161 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:21,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:38:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21187 states. [2022-11-16 16:38:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21187 to 21187. [2022-11-16 16:38:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21187 states, 21154 states have (on average 4.762456273045287) internal successors, (100745), 21186 states have internal predecessors, (100745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21187 states to 21187 states and 100745 transitions. [2022-11-16 16:38:22,051 INFO L78 Accepts]: Start accepts. Automaton has 21187 states and 100745 transitions. Word has length 16 [2022-11-16 16:38:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:22,051 INFO L495 AbstractCegarLoop]: Abstraction has 21187 states and 100745 transitions. [2022-11-16 16:38:22,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 21187 states and 100745 transitions. [2022-11-16 16:38:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:38:22,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:22,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:22,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Forceful destruction successful, exit code 0 [2022-11-16 16:38:22,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (243)] Ended with exit code 0 [2022-11-16 16:38:22,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,243 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:22,471 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 16:38:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:38:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 534408138, now seen corresponding path program 1 times [2022-11-16 16:38:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:38:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164218433] [2022-11-16 16:38:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:22,472 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 [2022-11-16 16:38:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:38:22,474 INFO L229 MonitoredProcess]: Starting monitored process 244 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -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) [2022-11-16 16:38:22,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Waiting until timeout for monitored process [2022-11-16 16:38:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:23,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 16:38:23,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:23,355 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 16:38:23,355 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 [2022-11-16 16:38:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:23,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:38:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:38:24,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:38:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164218433] [2022-11-16 16:38:24,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164218433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:38:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190743026] [2022-11-16 16:38:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:38:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:38:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:38:24,355 INFO L229 MonitoredProcess]: Starting monitored process 245 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:38:24,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (245)] Waiting until timeout for monitored process [2022-11-16 16:38:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:38:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:38:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:38:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:38:25,690 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 16:38:25,690 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 [2022-11-16 16:38:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 16:38:25,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:38:25,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1190743026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:38:25,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:38:25,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-16 16:38:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890438399] [2022-11-16 16:38:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:38:25,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:38:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:38:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:38:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:25,900 INFO L87 Difference]: Start difference. First operand 21187 states and 100745 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:38:26,117 INFO L93 Difference]: Finished difference Result 21182 states and 100730 transitions. [2022-11-16 16:38:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:38:26,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 16:38:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:38:26,194 INFO L225 Difference]: With dead ends: 21182 [2022-11-16 16:38:26,194 INFO L226 Difference]: Without dead ends: 21182 [2022-11-16 16:38:26,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-16 16:38:26,194 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:38:26,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 16:38:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21182 states. [2022-11-16 16:38:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21182 to 21182. [2022-11-16 16:38:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21182 states, 21149 states have (on average 4.762872949075606) internal successors, (100730), 21181 states have internal predecessors, (100730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21182 states to 21182 states and 100730 transitions. [2022-11-16 16:38:27,123 INFO L78 Accepts]: Start accepts. Automaton has 21182 states and 100730 transitions. Word has length 16 [2022-11-16 16:38:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:38:27,124 INFO L495 AbstractCegarLoop]: Abstraction has 21182 states and 100730 transitions. [2022-11-16 16:38:27,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:38:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21182 states and 100730 transitions. [2022-11-16 16:38:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:38:27,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:38:27,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:38:27,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d30706d-b30e-4dd0-8111-c03feebe717c/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Forceful destruction successful, exit code 0