./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS --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 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- 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-8393723 [2022-11-19 07:47:23,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:47:23,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:47:23,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:47:23,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:47:23,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:47:23,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:47:23,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:47:23,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:47:23,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:47:23,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:47:23,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:47:23,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:47:23,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:47:23,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:47:23,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:47:23,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:47:23,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:47:23,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:47:23,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:47:23,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:47:23,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:47:23,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:47:23,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:47:23,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:47:23,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:47:23,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:47:23,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:47:23,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:47:23,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:47:23,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:47:23,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:47:23,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:47:23,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:47:23,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:47:23,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:47:23,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:47:23,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:47:23,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:47:23,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:47:23,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:47:23,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:47:23,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:47:23,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:47:23,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:47:23,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:47:23,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:47:23,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:47:23,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:47:23,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:47:23,360 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:47:23,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:47:23,361 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:47:23,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:47:23,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:47:23,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:47:23,362 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:47:23,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:47:23,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:47:23,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:47:23,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:47:23,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:47:23,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:47:23,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:47:23,366 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:47:23,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:47:23,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:47:23,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:47:23,367 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:47:23,367 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:47:23,367 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:47:23,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:47:23,368 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:47:23,368 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:47:23,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:47:23,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:47:23,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:47:23,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:23,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:47:23,369 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:47:23,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:47:23,370 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:47:23,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:47:23,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:47:23,370 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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2022-11-19 07:47:23,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:47:23,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:47:23,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:47:23,697 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:47:23,699 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:47:23,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-11-19 07:47:23,797 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/a0f9053b9/86e84789ed124daf8a352bba3c53d91e/FLAG63ec746d9 [2022-11-19 07:47:24,408 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:47:24,409 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-11-19 07:47:24,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/a0f9053b9/86e84789ed124daf8a352bba3c53d91e/FLAG63ec746d9 [2022-11-19 07:47:24,740 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/a0f9053b9/86e84789ed124daf8a352bba3c53d91e [2022-11-19 07:47:24,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:47:24,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:47:24,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:24,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:47:24,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:47:24,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:24" (1/1) ... [2022-11-19 07:47:24,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2c2937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:24, skipping insertion in model container [2022-11-19 07:47:24,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:24" (1/1) ... [2022-11-19 07:47:24,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:47:24,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:47:25,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:25,381 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) [2022-11-19 07:47:25,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d77c503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25, skipping insertion in model container [2022-11-19 07:47:25,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:25,384 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:47:25,388 INFO L158 Benchmark]: Toolchain (without parser) took 638.11ms. Allocated memory is still 140.5MB. Free memory was 107.7MB in the beginning and 112.7MB in the end (delta: -5.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,390 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 86.0MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:47:25,392 INFO L158 Benchmark]: CACSL2BoogieTranslator took 630.51ms. Allocated memory is still 140.5MB. Free memory was 107.3MB in the beginning and 112.7MB in the end (delta: -5.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,394 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 86.0MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 630.51ms. Allocated memory is still 140.5MB. Free memory was 107.3MB in the beginning and 112.7MB in the end (delta: -5.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 545]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS --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 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- 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-8393723 [2022-11-19 07:47:27,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:47:27,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:47:27,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:47:27,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:47:27,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:47:27,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:47:27,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:47:27,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:47:27,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:47:27,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:47:27,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:47:27,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:47:27,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:47:27,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:47:27,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:47:27,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:47:27,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:47:27,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:47:27,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:47:27,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:47:27,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:47:27,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:47:27,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:47:27,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:47:27,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:47:27,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:47:27,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:47:27,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:47:27,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:47:27,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:47:27,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:47:27,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:47:27,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:47:27,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:47:27,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:47:27,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:47:27,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:47:27,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:47:27,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:47:27,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:47:27,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:47:27,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:47:27,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:47:28,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:47:28,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:47:28,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:47:28,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:47:28,002 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:47:28,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:47:28,003 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:47:28,003 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:47:28,004 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:47:28,005 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:47:28,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:47:28,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:47:28,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:47:28,007 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:47:28,007 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:47:28,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:47:28,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:47:28,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:47:28,008 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:47:28,009 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:47:28,009 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:47:28,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:47:28,009 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:47:28,010 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:47:28,010 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:47:28,010 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:47:28,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:47:28,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:47:28,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:47:28,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:47:28,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:28,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:47:28,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:47:28,013 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:47:28,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:28,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:47:28,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:47:28,014 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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2022-11-19 07:47:28,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:47:28,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:47:28,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:47:28,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:47:28,458 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:47:28,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-11-19 07:47:28,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/4ce2fa90b/212dfaf446a344f89daeadf880fec854/FLAG562d959dc [2022-11-19 07:47:29,348 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:47:29,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2022-11-19 07:47:29,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/4ce2fa90b/212dfaf446a344f89daeadf880fec854/FLAG562d959dc [2022-11-19 07:47:29,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/data/4ce2fa90b/212dfaf446a344f89daeadf880fec854 [2022-11-19 07:47:29,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:47:29,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:47:29,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:29,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:47:29,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:47:29,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6259f784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29, skipping insertion in model container [2022-11-19 07:47:29,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:47:29,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:47:30,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:30,122 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:47:30,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:47:30,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:30,194 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:47:30,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:30,302 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:47:30,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30 WrapperNode [2022-11-19 07:47:30,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:30,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:47:30,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:47:30,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:47:30,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,359 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-11-19 07:47:30,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:47:30,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:47:30,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:47:30,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:47:30,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:47:30,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:47:30,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:47:30,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:47:30,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (1/1) ... [2022-11-19 07:47:30,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:30,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:30,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:47:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:47:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:47:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:47:30,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:47:30,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:47:30,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:47:30,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:47:30,669 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:47:30,671 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:47:31,176 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:47:31,183 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:47:31,184 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:47:31,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:31 BoogieIcfgContainer [2022-11-19 07:47:31,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:47:31,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:47:31,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:47:31,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:47:31,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:29" (1/3) ... [2022-11-19 07:47:31,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed9e5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:31, skipping insertion in model container [2022-11-19 07:47:31,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:30" (2/3) ... [2022-11-19 07:47:31,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed9e5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:31, skipping insertion in model container [2022-11-19 07:47:31,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:31" (3/3) ... [2022-11-19 07:47:31,210 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-alloca-2.i [2022-11-19 07:47:31,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:47:31,234 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-19 07:47:31,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:47:31,344 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;@4a3991ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:47:31,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-19 07:47:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:47:31,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:31,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:31,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-19 07:47:31,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475472360] [2022-11-19 07:47:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:31,390 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 [2022-11-19 07:47:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:31,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:31,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:47:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:31,769 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-19 07:47:31,770 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 07:47:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:31,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:31,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475472360] [2022-11-19 07:47:31,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475472360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:31,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:31,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:47:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956800968] [2022-11-19 07:47:31,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:47:31,895 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) 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) [2022-11-19 07:47:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:32,010 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-19 07:47:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 [2022-11-19 07:47:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:32,026 INFO L225 Difference]: With dead ends: 41 [2022-11-19 07:47:32,026 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 07:47:32,028 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 [2022-11-19 07:47:32,032 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:32,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 07:47:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-19 07:47:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 38 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) [2022-11-19 07:47:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-19 07:47:32,088 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 7 [2022-11-19 07:47:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:32,089 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-19 07:47:32,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2022-11-19 07:47:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-19 07:47:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:47:32,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:32,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:32,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:32,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-11-19 07:47:32,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832125300] [2022-11-19 07:47:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:32,308 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 [2022-11-19 07:47:32,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:32,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:32,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:47:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:32,562 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-19 07:47:32,563 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 2 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 07:47:32,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:47:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:32,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:32,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:32,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832125300] [2022-11-19 07:47:32,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832125300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:32,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:32,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801302118] [2022-11-19 07:47:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:32,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:32,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:32,691 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:33,085 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2022-11-19 07:47:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:47:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:33,087 INFO L225 Difference]: With dead ends: 79 [2022-11-19 07:47:33,088 INFO L226 Difference]: Without dead ends: 79 [2022-11-19 07:47:33,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:33,090 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 47 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:33,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 165 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:47:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-19 07:47:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2022-11-19 07:47:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-19 07:47:33,099 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 7 [2022-11-19 07:47:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:33,099 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-19 07:47:33,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-19 07:47:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:47:33,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:33,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:33,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:33,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:33,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-19 07:47:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:33,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600952218] [2022-11-19 07:47:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:33,326 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 [2022-11-19 07:47:33,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:33,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:33,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:47:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:33,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:33,534 INFO L321 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-11-19 07:47:33,535 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 2 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:47:33,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:47:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:33,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:33,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600952218] [2022-11-19 07:47:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600952218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451827458] [2022-11-19 07:47:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:33,677 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:33,729 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-11-19 07:47:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:47:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:33,731 INFO L225 Difference]: With dead ends: 45 [2022-11-19 07:47:33,731 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 07:47:33,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:33,733 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:33,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-11-19 07:47:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 07:47:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-19 07:47:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-11-19 07:47:33,739 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 7 [2022-11-19 07:47:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:33,740 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-11-19 07:47:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-11-19 07:47:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:47:33,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:33,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:33,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-19 07:47:33,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:33,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130454, now seen corresponding path program 1 times [2022-11-19 07:47:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:33,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514645638] [2022-11-19 07:47:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:33,956 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 [2022-11-19 07:47:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:33,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:33,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:34,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:34,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514645638] [2022-11-19 07:47:34,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514645638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:34,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:34,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573566635] [2022-11-19 07:47:34,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:34,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:34,113 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:34,175 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-19 07:47:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:47:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:34,179 INFO L225 Difference]: With dead ends: 46 [2022-11-19 07:47:34,180 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 07:47:34,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:34,181 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:34,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 76 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 07:47:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-11-19 07:47:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-11-19 07:47:34,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 9 [2022-11-19 07:47:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:34,188 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-11-19 07:47:34,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-11-19 07:47:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:47:34,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:34,190 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:34,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:34,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:34,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2022-11-19 07:47:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807977596] [2022-11-19 07:47:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:34,407 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 [2022-11-19 07:47:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:34,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:34,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:34,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:34,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:34,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:34,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807977596] [2022-11-19 07:47:34,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807977596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:34,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034990435] [2022-11-19 07:47:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:34,683 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:34,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:47:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:34,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:34,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2034990435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:34,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608209653] [2022-11-19 07:47:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:34,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:34,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:34,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:47:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:35,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:35,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608209653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:35,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:47:35,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-19 07:47:35,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686160289] [2022-11-19 07:47:35,101 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:35,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:35,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:35,105 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:35,212 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-11-19 07:47:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:47:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:35,216 INFO L225 Difference]: With dead ends: 77 [2022-11-19 07:47:35,216 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 07:47:35,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:35,220 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:35,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 187 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 07:47:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2022-11-19 07:47:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-19 07:47:35,229 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2022-11-19 07:47:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:35,229 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-19 07:47:35,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-19 07:47:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:47:35,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:35,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:35,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:35,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:35,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:35,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:35,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:35,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-19 07:47:35,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:35,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317004868] [2022-11-19 07:47:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:35,839 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 [2022-11-19 07:47:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:35,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:35,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:47:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:47:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:36,054 INFO L321 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-11-19 07:47:36,055 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 2 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:47:36,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:47:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:36,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:36,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:37,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317004868] [2022-11-19 07:47:37,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317004868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733542951] [2022-11-19 07:47:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:37,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:37,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 07:47:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:37,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:47:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:37,371 INFO L321 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-11-19 07:47:37,371 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 2 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:47:37,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:47:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:37,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:37,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:37,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [733542951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357219646] [2022-11-19 07:47:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:37,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:37,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:37,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:47:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:37,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:47:37,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:38,029 INFO L321 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2022-11-19 07:47:38,030 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 2 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:47:38,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:47:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:38,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:38,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:38,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357219646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:38,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:47:38,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 6, 5, 5] total 14 [2022-11-19 07:47:38,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064965711] [2022-11-19 07:47:38,431 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:38,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:47:38,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:38,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:47:38,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:47:38,432 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:39,177 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-11-19 07:47:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:47:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-11-19 07:47:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:39,180 INFO L225 Difference]: With dead ends: 85 [2022-11-19 07:47:39,181 INFO L226 Difference]: Without dead ends: 85 [2022-11-19 07:47:39,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:47:39,182 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 234 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:39,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 208 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 7 Unchecked, 0.7s Time] [2022-11-19 07:47:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-19 07:47:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56. [2022-11-19 07:47:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.5) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-19 07:47:39,186 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 11 [2022-11-19 07:47:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:39,187 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-19 07:47:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-19 07:47:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:47:39,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:39,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:39,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:39,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:39,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:39,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:39,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2022-11-19 07:47:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:39,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570190414] [2022-11-19 07:47:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:39,790 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 [2022-11-19 07:47:39,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:39,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:39,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:47:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:39,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:47:39,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:39,939 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2022-11-19 07:47:39,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2022-11-19 07:47:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:39,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:39,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:39,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570190414] [2022-11-19 07:47:39,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570190414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:39,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:39,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:47:39,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16936478] [2022-11-19 07:47:39,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:39,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:39,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:47:39,979 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:40,055 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-11-19 07:47:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:47:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:40,057 INFO L225 Difference]: With dead ends: 55 [2022-11-19 07:47:40,057 INFO L226 Difference]: Without dead ends: 55 [2022-11-19 07:47:40,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:47:40,059 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:40,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-19 07:47:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-19 07:47:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-11-19 07:47:40,065 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2022-11-19 07:47:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:40,066 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-11-19 07:47:40,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-11-19 07:47:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:47:40,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:40,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:40,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2022-11-19 07:47:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:40,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263949048] [2022-11-19 07:47:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:40,278 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 [2022-11-19 07:47:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:40,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:40,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:47:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:47:40,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,420 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 07:47:40,420 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 07:47:40,435 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 [2022-11-19 07:47:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:40,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:40,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:40,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263949048] [2022-11-19 07:47:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263949048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:40,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:40,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585514070] [2022-11-19 07:47:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:40,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:40,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:40,527 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:40,823 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-11-19 07:47:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:47:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:40,825 INFO L225 Difference]: With dead ends: 109 [2022-11-19 07:47:40,826 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 07:47:40,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:40,827 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 82 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:40,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 144 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:47:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 07:47:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2022-11-19 07:47:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 78 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2022-11-19 07:47:40,839 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 13 [2022-11-19 07:47:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:40,839 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2022-11-19 07:47:40,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2022-11-19 07:47:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:47:40,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:40,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:40,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:41,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2022-11-19 07:47:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:41,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094968920] [2022-11-19 07:47:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:41,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:41,054 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:41,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:47:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:41,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:41,249 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:47:41,249 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:47:41,261 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 [2022-11-19 07:47:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:41,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:41,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:41,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094968920] [2022-11-19 07:47:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094968920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:41,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:41,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:41,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001361388] [2022-11-19 07:47:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:41,451 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:41,484 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-11-19 07:47:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:41,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:47:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:41,486 INFO L225 Difference]: With dead ends: 81 [2022-11-19 07:47:41,486 INFO L226 Difference]: Without dead ends: 81 [2022-11-19 07:47:41,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:41,487 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:41,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-11-19 07:47:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-19 07:47:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-11-19 07:47:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-11-19 07:47:41,492 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 13 [2022-11-19 07:47:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:41,492 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-11-19 07:47:41,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-11-19 07:47:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:47:41,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:41,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:41,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:41,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:41,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1046384445, now seen corresponding path program 1 times [2022-11-19 07:47:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525555990] [2022-11-19 07:47:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:41,695 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 [2022-11-19 07:47:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:41,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:41,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 07:47:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:47:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:41,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:41,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:41,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525555990] [2022-11-19 07:47:41,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525555990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:41,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:41,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:41,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187393411] [2022-11-19 07:47:41,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:41,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:41,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:41,836 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-19 07:47:42,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:42,005 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2022-11-19 07:47:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2022-11-19 07:47:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:42,008 INFO L225 Difference]: With dead ends: 130 [2022-11-19 07:47:42,008 INFO L226 Difference]: Without dead ends: 130 [2022-11-19 07:47:42,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:42,009 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:42,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 127 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-19 07:47:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 91. [2022-11-19 07:47:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 80 states have (on average 1.3625) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-19 07:47:42,023 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 16 [2022-11-19 07:47:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:42,024 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-19 07:47:42,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-19 07:47:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-19 07:47:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:47:42,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:42,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:42,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:42,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:42,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385311, now seen corresponding path program 1 times [2022-11-19 07:47:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:42,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967420161] [2022-11-19 07:47:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:42,243 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 [2022-11-19 07:47:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:42,245 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:42,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:42,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:42,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967420161] [2022-11-19 07:47:42,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967420161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:42,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:42,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465038009] [2022-11-19 07:47:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:42,429 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2022-11-19 07:47:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:42,558 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-11-19 07:47:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 [2022-11-19 07:47:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:42,560 INFO L225 Difference]: With dead ends: 89 [2022-11-19 07:47:42,560 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 07:47:42,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:42,561 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:42,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 07:47:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-19 07:47:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.3375) internal successors, (107), 88 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-11-19 07:47:42,578 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 16 [2022-11-19 07:47:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:42,578 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-11-19 07:47:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2022-11-19 07:47:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-11-19 07:47:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:47:42,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:42,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:42,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:42,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:42,784 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385312, now seen corresponding path program 1 times [2022-11-19 07:47:42,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:42,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122866263] [2022-11-19 07:47:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:42,785 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 [2022-11-19 07:47:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:42,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:42,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:47:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:42,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:43,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-19 07:47:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:43,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122866263] [2022-11-19 07:47:43,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122866263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:43,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [601156137] [2022-11-19 07:47:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:43,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:43,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:43,355 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 07:47:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:43,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:43,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:43,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [601156137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:43,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:43,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-19 07:47:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812808048] [2022-11-19 07:47:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:43,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:43,672 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-19 07:47:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:43,733 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-11-19 07:47:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:43,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2022-11-19 07:47:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:43,735 INFO L225 Difference]: With dead ends: 93 [2022-11-19 07:47:43,735 INFO L226 Difference]: Without dead ends: 93 [2022-11-19 07:47:43,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:43,736 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:43,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-19 07:47:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2022-11-19 07:47:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 63 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) [2022-11-19 07:47:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-11-19 07:47:43,761 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 16 [2022-11-19 07:47:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:43,764 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-11-19 07:47:43,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-19 07:47:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-11-19 07:47:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:47:43,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:43,770 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:43,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:43,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:44,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2022-11-19 07:47:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586208878] [2022-11-19 07:47:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:44,181 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 [2022-11-19 07:47:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:44,182 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:44,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:44,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586208878] [2022-11-19 07:47:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586208878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719037622] [2022-11-19 07:47:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:44,466 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:44,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:44,471 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:44,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-19 07:47:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:44,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:44,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:44,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719037622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:44,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140333276] [2022-11-19 07:47:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:44,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:44,782 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:44,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:47:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:44,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:44,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140333276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:44,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:47:44,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-19 07:47:44,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350859053] [2022-11-19 07:47:44,990 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:44,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:44,994 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:45,111 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2022-11-19 07:47:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:47:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:45,114 INFO L225 Difference]: With dead ends: 120 [2022-11-19 07:47:45,114 INFO L226 Difference]: Without dead ends: 120 [2022-11-19 07:47:45,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:45,115 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 101 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:45,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 174 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-19 07:47:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2022-11-19 07:47:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-19 07:47:45,121 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 17 [2022-11-19 07:47:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:45,122 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-19 07:47:45,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-19 07:47:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:47:45,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:45,135 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:45,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:45,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:45,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:47:45,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:47:45,737 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2022-11-19 07:47:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:45,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141220092] [2022-11-19 07:47:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:45,739 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 [2022-11-19 07:47:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:45,740 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:45,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 07:47:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:47:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:45,993 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:47:45,993 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:47:46,013 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 [2022-11-19 07:47:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:46,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:47,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:47,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141220092] [2022-11-19 07:47:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141220092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128012201] [2022-11-19 07:47:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:47,236 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:47,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-19 07:47:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:47:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:47,583 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:47:47,583 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:47:47,602 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 42 treesize of output 38 [2022-11-19 07:47:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:47,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:48,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2128012201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798202737] [2022-11-19 07:47:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:48,248 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:48,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:47:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:48,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:47:48,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:48,418 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:47:48,419 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:47:48,436 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 [2022-11-19 07:47:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:48,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:48,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798202737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:48,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:47:48,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 15 [2022-11-19 07:47:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429446408] [2022-11-19 07:47:48,960 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:48,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:47:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:47:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:47:48,967 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:49,880 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2022-11-19 07:47:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:47:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:47:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:49,883 INFO L225 Difference]: With dead ends: 135 [2022-11-19 07:47:49,883 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 07:47:49,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:47:49,884 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:49,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 163 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 22 Unchecked, 0.7s Time] [2022-11-19 07:47:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 07:47:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-11-19 07:47:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.2788461538461537) internal successors, (133), 112 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2022-11-19 07:47:49,888 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 17 [2022-11-19 07:47:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:49,888 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2022-11-19 07:47:49,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2022-11-19 07:47:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:47:49,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:49,889 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:49,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:50,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-19 07:47:50,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:50,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash -472171212, now seen corresponding path program 2 times [2022-11-19 07:47:50,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:50,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180620252] [2022-11-19 07:47:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:47:50,492 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 [2022-11-19 07:47:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:50,493 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:50,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 07:47:50,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:47:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:47:50,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:50,676 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 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-19 07:47:50,697 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:47:50,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:47:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:51,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:52,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:52,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:52,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:52,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180620252] [2022-11-19 07:47:52,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180620252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:52,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752599775] [2022-11-19 07:47:52,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:47:52,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:52,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:52,314 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:52,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 07:47:52,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:47:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:47:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:52,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:52,631 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:47:52,631 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 1 case distinctions, treesize of input 14 treesize of output 22 [2022-11-19 07:47:52,657 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:47:52,657 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 44 treesize of output 45 [2022-11-19 07:47:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:53,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:53,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:53,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752599775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127430199] [2022-11-19 07:47:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:47:53,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:53,547 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:53,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:47:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:47:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:47:53,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:53,699 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 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-19 07:47:53,709 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:47:53,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:47:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:54,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:55,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:55,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127430199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:55,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:47:55,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 25 [2022-11-19 07:47:55,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230548622] [2022-11-19 07:47:55,313 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:47:55,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:47:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:47:55,314 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:58,146 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2022-11-19 07:47:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:47:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 07:47:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:58,148 INFO L225 Difference]: With dead ends: 145 [2022-11-19 07:47:58,149 INFO L226 Difference]: Without dead ends: 145 [2022-11-19 07:47:58,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:47:58,150 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:58,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 315 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 17 Unchecked, 0.7s Time] [2022-11-19 07:47:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-19 07:47:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-19 07:47:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 136 states have (on average 1.2720588235294117) internal successors, (173), 144 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2022-11-19 07:47:58,157 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 19 [2022-11-19 07:47:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:58,157 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2022-11-19 07:47:58,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2022-11-19 07:47:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:47:58,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:58,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:58,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:58,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-19 07:47:58,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-19 07:47:58,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:58,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:47:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1860318341, now seen corresponding path program 1 times [2022-11-19 07:47:58,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:58,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976997120] [2022-11-19 07:47:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:58,764 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 [2022-11-19 07:47:58,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:58,765 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:47:58,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 07:47:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:47:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:59,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:59,363 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 [2022-11-19 07:47:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:59,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976997120] [2022-11-19 07:47:59,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976997120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247374605] [2022-11-19 07:47:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:59,452 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:59,454 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:59,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 07:47:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:47:59,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:59,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:59,944 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 [2022-11-19 07:47:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:59,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1247374605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281501883] [2022-11-19 07:47:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:59,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:59,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:59,987 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:59,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:48:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:00,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:00,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:00,433 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 [2022-11-19 07:48:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281501883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:00,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:00,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-19 07:48:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515188023] [2022-11-19 07:48:00,463 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:48:00,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:48:00,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:48:00,464 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:01,450 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2022-11-19 07:48:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:48:01,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 07:48:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:01,454 INFO L225 Difference]: With dead ends: 231 [2022-11-19 07:48:01,454 INFO L226 Difference]: Without dead ends: 231 [2022-11-19 07:48:01,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:48:01,456 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 206 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:01,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 122 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:48:01,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-19 07:48:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2022-11-19 07:48:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 141 states have (on average 1.2836879432624113) internal successors, (181), 149 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2022-11-19 07:48:01,463 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 20 [2022-11-19 07:48:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:01,463 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2022-11-19 07:48:01,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2022-11-19 07:48:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:48:01,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:01,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:01,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-19 07:48:01,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-19 07:48:01,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:02,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:02,080 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 440503382, now seen corresponding path program 1 times [2022-11-19 07:48:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:02,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158562506] [2022-11-19 07:48:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:02,081 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 [2022-11-19 07:48:02,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:02,082 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:02,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:02,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:02,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:02,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:02,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158562506] [2022-11-19 07:48:02,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158562506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:02,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [242964459] [2022-11-19 07:48:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:02,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:02,503 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:02,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-19 07:48:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:02,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:02,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [242964459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:02,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186044540] [2022-11-19 07:48:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:02,854 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:02,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 07:48:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:03,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:03,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186044540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:03,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-19 07:48:03,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6, 7, 6] total 12 [2022-11-19 07:48:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372625306] [2022-11-19 07:48:03,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:48:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:48:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:48:03,122 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:03,242 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2022-11-19 07:48:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:48:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 07:48:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:03,246 INFO L225 Difference]: With dead ends: 163 [2022-11-19 07:48:03,246 INFO L226 Difference]: Without dead ends: 163 [2022-11-19 07:48:03,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:48:03,247 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 59 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:03,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 68 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:48:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-19 07:48:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2022-11-19 07:48:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 126 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2022-11-19 07:48:03,253 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 20 [2022-11-19 07:48:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:03,253 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2022-11-19 07:48:03,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2022-11-19 07:48:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:48:03,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:03,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:03,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:03,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-19 07:48:03,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:03,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:03,859 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293711, now seen corresponding path program 1 times [2022-11-19 07:48:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608053738] [2022-11-19 07:48:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:03,861 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 [2022-11-19 07:48:03,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:03,861 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:03,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:48:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:48:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:04,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:04,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:04,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608053738] [2022-11-19 07:48:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608053738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:04,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:04,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:48:04,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827887799] [2022-11-19 07:48:04,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:04,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:48:04,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:04,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:48:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:48:04,013 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:04,118 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2022-11-19 07:48:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:48:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 07:48:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:04,120 INFO L225 Difference]: With dead ends: 126 [2022-11-19 07:48:04,120 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:48:04,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:04,121 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:04,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:48:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:48:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-19 07:48:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 125 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2022-11-19 07:48:04,126 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 21 [2022-11-19 07:48:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:04,127 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2022-11-19 07:48:04,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2022-11-19 07:48:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:48:04,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:04,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:04,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:48:04,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:04,338 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293710, now seen corresponding path program 1 times [2022-11-19 07:48:04,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:04,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110541410] [2022-11-19 07:48:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:04,339 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 [2022-11-19 07:48:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:04,340 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:04,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 07:48:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:04,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:04,909 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 [2022-11-19 07:48:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:05,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:05,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110541410] [2022-11-19 07:48:05,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110541410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:05,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762601723] [2022-11-19 07:48:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:05,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:05,070 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:05,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-19 07:48:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:05,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:05,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:05,536 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 [2022-11-19 07:48:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:05,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762601723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976708819] [2022-11-19 07:48:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:05,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:05,594 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:05,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:48:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:05,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:05,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:05,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:05,897 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 [2022-11-19 07:48:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:05,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976708819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:05,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:05,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2022-11-19 07:48:05,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585742506] [2022-11-19 07:48:05,948 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:05,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:48:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:48:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:48:05,950 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:07,104 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2022-11-19 07:48:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:48:07,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 07:48:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:07,107 INFO L225 Difference]: With dead ends: 208 [2022-11-19 07:48:07,107 INFO L226 Difference]: Without dead ends: 208 [2022-11-19 07:48:07,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:48:07,108 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 377 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:07,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 142 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:48:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-19 07:48:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 129. [2022-11-19 07:48:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.2892561983471074) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2022-11-19 07:48:07,114 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 21 [2022-11-19 07:48:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:07,115 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2022-11-19 07:48:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2022-11-19 07:48:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:48:07,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:07,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:07,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:07,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-19 07:48:07,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-19 07:48:07,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:07,721 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1059572912, now seen corresponding path program 1 times [2022-11-19 07:48:07,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668212202] [2022-11-19 07:48:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:07,722 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 [2022-11-19 07:48:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:07,723 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:07,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-19 07:48:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:07,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:07,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:07,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:07,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668212202] [2022-11-19 07:48:07,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668212202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:07,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:07,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:48:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756867368] [2022-11-19 07:48:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:07,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:07,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:07,938 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:08,051 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2022-11-19 07:48:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:08,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 07:48:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:08,054 INFO L225 Difference]: With dead ends: 158 [2022-11-19 07:48:08,055 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 07:48:08,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:48:08,056 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 52 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:08,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:48:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 07:48:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2022-11-19 07:48:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.316546762589928) internal successors, (183), 146 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2022-11-19 07:48:08,060 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 22 [2022-11-19 07:48:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:08,061 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2022-11-19 07:48:08,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2022-11-19 07:48:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:48:08,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:08,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:08,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:08,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:08,274 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450642, now seen corresponding path program 1 times [2022-11-19 07:48:08,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698134135] [2022-11-19 07:48:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:08,276 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 [2022-11-19 07:48:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:08,277 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:08,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:48:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:08,472 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:48:08,473 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:48:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:08,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:08,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698134135] [2022-11-19 07:48:08,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698134135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:08,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:08,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:48:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652882741] [2022-11-19 07:48:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:08,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:48:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:48:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:48:08,542 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:08,635 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2022-11-19 07:48:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:48:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 07:48:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:08,641 INFO L225 Difference]: With dead ends: 146 [2022-11-19 07:48:08,641 INFO L226 Difference]: Without dead ends: 146 [2022-11-19 07:48:08,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:08,643 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:08,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:48:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-19 07:48:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-19 07:48:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 145 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2022-11-19 07:48:08,649 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 22 [2022-11-19 07:48:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:08,649 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2022-11-19 07:48:08,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2022-11-19 07:48:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:48:08,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:08,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:08,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-19 07:48:08,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:08,851 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450643, now seen corresponding path program 1 times [2022-11-19 07:48:08,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:08,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526480028] [2022-11-19 07:48:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:08,852 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 [2022-11-19 07:48:08,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:08,854 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:08,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:48:08,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:09,068 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:48:09,068 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-19 07:48:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:09,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:09,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:09,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526480028] [2022-11-19 07:48:09,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526480028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:09,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:09,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084122061] [2022-11-19 07:48:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:09,218 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:09,571 INFO L93 Difference]: Finished difference Result 250 states and 315 transitions. [2022-11-19 07:48:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 07:48:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:09,577 INFO L225 Difference]: With dead ends: 250 [2022-11-19 07:48:09,577 INFO L226 Difference]: Without dead ends: 250 [2022-11-19 07:48:09,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:48:09,578 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:09,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 121 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:48:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-19 07:48:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 202. [2022-11-19 07:48:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 195 states have (on average 1.323076923076923) internal successors, (258), 201 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2022-11-19 07:48:09,586 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 22 [2022-11-19 07:48:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:09,586 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2022-11-19 07:48:09,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2022-11-19 07:48:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:48:09,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:09,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:09,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:09,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:09,803 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:09,803 INFO L85 PathProgramCache]: Analyzing trace with hash 728802193, now seen corresponding path program 1 times [2022-11-19 07:48:09,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780627640] [2022-11-19 07:48:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:09,804 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 [2022-11-19 07:48:09,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:09,805 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:09,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-19 07:48:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:48:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:10,069 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:48:10,069 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:48:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:10,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:10,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:10,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780627640] [2022-11-19 07:48:10,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780627640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:10,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:10,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:10,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568271730] [2022-11-19 07:48:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:10,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:10,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:10,405 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:10,444 INFO L93 Difference]: Finished difference Result 229 states and 298 transitions. [2022-11-19 07:48:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:48:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 07:48:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:10,445 INFO L225 Difference]: With dead ends: 229 [2022-11-19 07:48:10,445 INFO L226 Difference]: Without dead ends: 229 [2022-11-19 07:48:10,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:10,446 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:10,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-11-19 07:48:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-19 07:48:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2022-11-19 07:48:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3383084577114428) internal successors, (269), 207 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2022-11-19 07:48:10,455 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 22 [2022-11-19 07:48:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:10,456 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2022-11-19 07:48:10,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2022-11-19 07:48:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:48:10,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:10,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:10,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:10,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:10,675 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:10,675 INFO L85 PathProgramCache]: Analyzing trace with hash 88962737, now seen corresponding path program 1 times [2022-11-19 07:48:10,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:10,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85203535] [2022-11-19 07:48:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:10,676 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 [2022-11-19 07:48:10,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:10,677 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:10,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 07:48:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:48:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:10,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:10,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85203535] [2022-11-19 07:48:10,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85203535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:10,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:10,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:48:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096975299] [2022-11-19 07:48:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:48:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:48:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:48:10,826 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:10,845 INFO L93 Difference]: Finished difference Result 216 states and 273 transitions. [2022-11-19 07:48:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:48:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 07:48:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:10,847 INFO L225 Difference]: With dead ends: 216 [2022-11-19 07:48:10,847 INFO L226 Difference]: Without dead ends: 216 [2022-11-19 07:48:10,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:48:10,849 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:10,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:48:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-19 07:48:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-11-19 07:48:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3134328358208955) internal successors, (264), 207 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2022-11-19 07:48:10,856 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 24 [2022-11-19 07:48:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:10,857 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2022-11-19 07:48:10,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2022-11-19 07:48:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:48:10,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:10,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:10,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:11,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:11,071 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash -747793046, now seen corresponding path program 1 times [2022-11-19 07:48:11,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43224132] [2022-11-19 07:48:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:11,073 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 [2022-11-19 07:48:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:11,076 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:11,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:11,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:11,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43224132] [2022-11-19 07:48:11,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43224132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087596667] [2022-11-19 07:48:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:11,475 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:11,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-19 07:48:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:11,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:11,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:11,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087596667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235096002] [2022-11-19 07:48:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:11,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:11,863 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:11,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 07:48:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:12,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:12,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235096002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:12,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:12,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-19 07:48:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604972398] [2022-11-19 07:48:12,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:12,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:48:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:48:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:48:12,109 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:12,250 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2022-11-19 07:48:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:48:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 07:48:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:12,252 INFO L225 Difference]: With dead ends: 221 [2022-11-19 07:48:12,253 INFO L226 Difference]: Without dead ends: 221 [2022-11-19 07:48:12,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:48:12,254 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 142 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:12,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 237 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:48:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-19 07:48:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 204. [2022-11-19 07:48:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.299492385786802) internal successors, (256), 203 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 256 transitions. [2022-11-19 07:48:12,262 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 256 transitions. Word has length 25 [2022-11-19 07:48:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:12,262 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 256 transitions. [2022-11-19 07:48:12,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 256 transitions. [2022-11-19 07:48:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:48:12,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:12,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:12,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:12,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:12,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:12,872 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash -528938328, now seen corresponding path program 1 times [2022-11-19 07:48:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:12,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981123872] [2022-11-19 07:48:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:12,874 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 [2022-11-19 07:48:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:12,875 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:12,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:13,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:13,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:13,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981123872] [2022-11-19 07:48:13,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981123872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:13,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1391992053] [2022-11-19 07:48:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:13,506 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:13,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-19 07:48:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:13,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:14,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:14,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1391992053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:14,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72762816] [2022-11-19 07:48:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:14,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:14,074 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:14,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-19 07:48:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:14,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:14,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72762816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:14,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:14,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 8, 9, 8] total 22 [2022-11-19 07:48:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817391116] [2022-11-19 07:48:14,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:48:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:14,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:48:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:48:14,437 INFO L87 Difference]: Start difference. First operand 204 states and 256 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:15,022 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2022-11-19 07:48:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:48:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 07:48:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:15,024 INFO L225 Difference]: With dead ends: 267 [2022-11-19 07:48:15,024 INFO L226 Difference]: Without dead ends: 267 [2022-11-19 07:48:15,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:48:15,025 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 302 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:15,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 366 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:48:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-19 07:48:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2022-11-19 07:48:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.3247863247863247) internal successors, (310), 240 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 310 transitions. [2022-11-19 07:48:15,035 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 310 transitions. Word has length 25 [2022-11-19 07:48:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:15,035 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 310 transitions. [2022-11-19 07:48:15,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 310 transitions. [2022-11-19 07:48:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:48:15,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:15,037 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:15,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:15,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-19 07:48:15,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:15,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:15,652 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1117279393, now seen corresponding path program 2 times [2022-11-19 07:48:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312030385] [2022-11-19 07:48:15,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:15,653 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 [2022-11-19 07:48:15,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:15,655 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:15,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 07:48:15,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:15,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:48:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:15,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:15,847 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:48:15,847 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 1 case distinctions, treesize of input 14 treesize of output 22 [2022-11-19 07:48:15,855 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 14 treesize of output 12 [2022-11-19 07:48:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:16,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:17,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:17,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312030385] [2022-11-19 07:48:17,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312030385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1308392010] [2022-11-19 07:48:17,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:17,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:17,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:17,823 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:17,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 07:48:18,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:48:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:18,133 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:48:18,134 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:48:18,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-19 07:48:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:18,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:19,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:19,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1308392010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261908486] [2022-11-19 07:48:19,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:19,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:19,422 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:19,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-19 07:48:19,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:48:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:19,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:19,681 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:48:19,681 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:48:19,697 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 [2022-11-19 07:48:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:19,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:20,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:20,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261908486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:20,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:20,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 22 [2022-11-19 07:48:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806628148] [2022-11-19 07:48:20,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:20,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:48:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:48:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:48:20,478 INFO L87 Difference]: Start difference. First operand 241 states and 310 transitions. Second operand has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:25,250 INFO L93 Difference]: Finished difference Result 471 states and 608 transitions. [2022-11-19 07:48:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:48:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 25 [2022-11-19 07:48:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:25,252 INFO L225 Difference]: With dead ends: 471 [2022-11-19 07:48:25,252 INFO L226 Difference]: Without dead ends: 471 [2022-11-19 07:48:25,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:48:25,253 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 300 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:25,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 476 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 369 Invalid, 0 Unknown, 35 Unchecked, 2.2s Time] [2022-11-19 07:48:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-19 07:48:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2022-11-19 07:48:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.3157894736842106) internal successors, (350), 272 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 350 transitions. [2022-11-19 07:48:25,271 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 350 transitions. Word has length 25 [2022-11-19 07:48:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:25,271 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 350 transitions. [2022-11-19 07:48:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 350 transitions. [2022-11-19 07:48:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:48:25,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:25,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:25,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:25,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-19 07:48:25,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-19 07:48:25,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:25,886 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1840804201, now seen corresponding path program 1 times [2022-11-19 07:48:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402620326] [2022-11-19 07:48:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:25,888 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 [2022-11-19 07:48:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:25,889 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:25,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:26,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:48:26,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:26,161 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:48:26,161 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:48:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:26,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:26,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:26,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402620326] [2022-11-19 07:48:26,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402620326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:26,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:26,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:26,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881397972] [2022-11-19 07:48:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:26,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:26,597 INFO L87 Difference]: Start difference. First operand 273 states and 350 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:26,646 INFO L93 Difference]: Finished difference Result 321 states and 418 transitions. [2022-11-19 07:48:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:48:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 07:48:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:26,649 INFO L225 Difference]: With dead ends: 321 [2022-11-19 07:48:26,649 INFO L226 Difference]: Without dead ends: 321 [2022-11-19 07:48:26,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:26,650 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:26,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-19 07:48:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-19 07:48:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 227. [2022-11-19 07:48:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 226 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 294 transitions. [2022-11-19 07:48:26,658 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 294 transitions. Word has length 26 [2022-11-19 07:48:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:26,659 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 294 transitions. [2022-11-19 07:48:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 294 transitions. [2022-11-19 07:48:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:48:26,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:26,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:26,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:26,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:26,875 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1854162937, now seen corresponding path program 1 times [2022-11-19 07:48:26,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:26,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959171964] [2022-11-19 07:48:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:26,876 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 [2022-11-19 07:48:26,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:26,878 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:26,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-19 07:48:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:27,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:27,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:27,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959171964] [2022-11-19 07:48:27,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959171964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:27,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124334671] [2022-11-19 07:48:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:27,387 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:27,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-19 07:48:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:27,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:27,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124334671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:27,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709749455] [2022-11-19 07:48:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:27,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:27,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:27,905 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:27,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-19 07:48:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:28,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709749455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:28,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:28,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 8, 8, 7] total 16 [2022-11-19 07:48:28,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204862119] [2022-11-19 07:48:28,282 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:28,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:48:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:28,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:48:28,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:48:28,284 INFO L87 Difference]: Start difference. First operand 227 states and 294 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:28,877 INFO L93 Difference]: Finished difference Result 233 states and 276 transitions. [2022-11-19 07:48:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:48:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 07:48:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:28,880 INFO L225 Difference]: With dead ends: 233 [2022-11-19 07:48:28,880 INFO L226 Difference]: Without dead ends: 233 [2022-11-19 07:48:28,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:48:28,882 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 283 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:28,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 213 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:48:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-19 07:48:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 186. [2022-11-19 07:48:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.25) internal successors, (225), 185 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 225 transitions. [2022-11-19 07:48:28,889 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 225 transitions. Word has length 27 [2022-11-19 07:48:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:28,889 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 225 transitions. [2022-11-19 07:48:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 225 transitions. [2022-11-19 07:48:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:48:28,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:28,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:28,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:29,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:29,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:29,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:29,500 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778955, now seen corresponding path program 1 times [2022-11-19 07:48:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564406424] [2022-11-19 07:48:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:29,501 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 [2022-11-19 07:48:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:29,502 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:29,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-19 07:48:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:48:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:48:32,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:32,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564406424] [2022-11-19 07:48:32,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564406424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:32,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:32,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781623109] [2022-11-19 07:48:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:32,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-11-19 07:48:32,248 INFO L87 Difference]: Start difference. First operand 186 states and 225 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:32,275 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2022-11-19 07:48:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:48:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:32,277 INFO L225 Difference]: With dead ends: 190 [2022-11-19 07:48:32,277 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 07:48:32,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-11-19 07:48:32,278 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:32,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-19 07:48:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 07:48:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-11-19 07:48:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.238888888888889) internal successors, (223), 185 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 223 transitions. [2022-11-19 07:48:32,284 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 223 transitions. Word has length 28 [2022-11-19 07:48:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:32,285 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 223 transitions. [2022-11-19 07:48:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 223 transitions. [2022-11-19 07:48:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:48:32,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:32,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:32,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-19 07:48:32,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:32,501 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778088, now seen corresponding path program 1 times [2022-11-19 07:48:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935028574] [2022-11-19 07:48:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:32,502 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 [2022-11-19 07:48:32,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:32,503 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:32,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:32,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:32,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935028574] [2022-11-19 07:48:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935028574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682965564] [2022-11-19 07:48:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:32,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:32,919 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:32,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-19 07:48:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:33,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:33,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682965564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:33,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702535684] [2022-11-19 07:48:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:33,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:33,334 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:33,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-19 07:48:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:48:33,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:33,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:48:33,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702535684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:33,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:33,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-19 07:48:33,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816922215] [2022-11-19 07:48:33,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:48:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:48:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:48:33,619 INFO L87 Difference]: Start difference. First operand 186 states and 223 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:33,783 INFO L93 Difference]: Finished difference Result 264 states and 308 transitions. [2022-11-19 07:48:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:48:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:48:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:33,786 INFO L225 Difference]: With dead ends: 264 [2022-11-19 07:48:33,786 INFO L226 Difference]: Without dead ends: 256 [2022-11-19 07:48:33,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:48:33,787 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 187 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:48:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-19 07:48:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2022-11-19 07:48:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.2217573221757323) internal successors, (292), 244 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2022-11-19 07:48:33,797 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 28 [2022-11-19 07:48:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:33,798 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2022-11-19 07:48:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2022-11-19 07:48:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:48:33,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:33,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:33,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:34,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:34,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-19 07:48:34,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:34,415 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1252738474, now seen corresponding path program 1 times [2022-11-19 07:48:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:34,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23389091] [2022-11-19 07:48:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:34,416 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 [2022-11-19 07:48:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:34,417 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:34,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:35,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:35,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23389091] [2022-11-19 07:48:35,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23389091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:35,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1586344678] [2022-11-19 07:48:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:35,099 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:35,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:35,100 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:35,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-19 07:48:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:35,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:35,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:35,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1586344678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541670205] [2022-11-19 07:48:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:35,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:35,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:35,695 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:35,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-19 07:48:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:48:35,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:36,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:36,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541670205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:36,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:36,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2022-11-19 07:48:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591850874] [2022-11-19 07:48:36,139 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:48:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:48:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:48:36,141 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:36,654 INFO L93 Difference]: Finished difference Result 323 states and 377 transitions. [2022-11-19 07:48:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:48:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 07:48:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:36,659 INFO L225 Difference]: With dead ends: 323 [2022-11-19 07:48:36,659 INFO L226 Difference]: Without dead ends: 315 [2022-11-19 07:48:36,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:48:36,662 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 189 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 225 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:48:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-19 07:48:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 245. [2022-11-19 07:48:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.2217573221757323) internal successors, (292), 244 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2022-11-19 07:48:36,673 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 28 [2022-11-19 07:48:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:36,673 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2022-11-19 07:48:36,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2022-11-19 07:48:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:48:36,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:36,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:36,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:36,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-19 07:48:37,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-19 07:48:37,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:37,289 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1138703979, now seen corresponding path program 2 times [2022-11-19 07:48:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:37,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461790794] [2022-11-19 07:48:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:37,291 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 [2022-11-19 07:48:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:37,292 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:37,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:37,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:37,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:37,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:48:37,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:37,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:38,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:48:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:38,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461790794] [2022-11-19 07:48:38,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461790794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063558501] [2022-11-19 07:48:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:38,553 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:38,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:38,554 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:38,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-19 07:48:38,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:38,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:38,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:48:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:39,063 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:48:39,064 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:48:39,081 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 [2022-11-19 07:48:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:40,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:41,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:41,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063558501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934388779] [2022-11-19 07:48:41,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:41,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:41,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:41,705 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-19 07:48:41,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:48:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:42,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:42,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:48:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:48:42,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934388779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:42,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:42,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 8, 8] total 30 [2022-11-19 07:48:42,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566999381] [2022-11-19 07:48:42,379 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:42,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:48:42,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:48:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:48:42,381 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 31 states, 30 states have (on average 3.2) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:44,315 INFO L93 Difference]: Finished difference Result 297 states and 348 transitions. [2022-11-19 07:48:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:48:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 07:48:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:44,318 INFO L225 Difference]: With dead ends: 297 [2022-11-19 07:48:44,318 INFO L226 Difference]: Without dead ends: 297 [2022-11-19 07:48:44,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:48:44,319 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 198 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:44,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 470 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 71 Unchecked, 1.2s Time] [2022-11-19 07:48:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-19 07:48:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 265. [2022-11-19 07:48:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.223938223938224) internal successors, (317), 264 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 317 transitions. [2022-11-19 07:48:44,326 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 317 transitions. Word has length 29 [2022-11-19 07:48:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:44,327 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 317 transitions. [2022-11-19 07:48:44,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 317 transitions. [2022-11-19 07:48:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:48:44,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:44,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:44,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:48:44,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-19 07:48:44,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:44,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:44,946 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1019375167, now seen corresponding path program 1 times [2022-11-19 07:48:44,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:44,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542161473] [2022-11-19 07:48:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:44,947 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 [2022-11-19 07:48:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:44,948 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:44,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-19 07:48:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:48:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:48:47,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:47,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542161473] [2022-11-19 07:48:47,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542161473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:47,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620456736] [2022-11-19 07:48:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:47,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:47,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-11-19 07:48:47,747 INFO L87 Difference]: Start difference. First operand 265 states and 317 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:47,759 INFO L93 Difference]: Finished difference Result 264 states and 316 transitions. [2022-11-19 07:48:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-19 07:48:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:47,762 INFO L225 Difference]: With dead ends: 264 [2022-11-19 07:48:47,762 INFO L226 Difference]: Without dead ends: 237 [2022-11-19 07:48:47,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-11-19 07:48:47,763 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:47,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-19 07:48:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-19 07:48:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-19 07:48:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.2198275862068966) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2022-11-19 07:48:47,771 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 31 [2022-11-19 07:48:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:47,771 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2022-11-19 07:48:47,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2022-11-19 07:48:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:48:47,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:47,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:47,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:48:47,988 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:48:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash -112944909, now seen corresponding path program 2 times [2022-11-19 07:48:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:48:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478644223] [2022-11-19 07:48:47,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:47,990 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 [2022-11-19 07:48:47,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:48:47,991 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:48:48,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:48,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:48,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:48,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:48:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:48,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:49,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:48:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:49,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:48:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478644223] [2022-11-19 07:48:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478644223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1756320198] [2022-11-19 07:48:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:48:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:48:49,303 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:48:49,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-19 07:48:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:48:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:49,758 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:48:49,759 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 1 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:48:49,793 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:48:49,794 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 44 treesize of output 45 [2022-11-19 07:48:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:51,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:52,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:48:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1756320198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332624564] [2022-11-19 07:48:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:48:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:52,428 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:52,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-19 07:48:52,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:48:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:52,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:48:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:52,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:52,724 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 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-19 07:48:52,737 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:48:52,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:48:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:48:53,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:54,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:54,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:48:54,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332624564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:48:54,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:48:54,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 8, 6, 6] total 32 [2022-11-19 07:48:54,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216605302] [2022-11-19 07:48:54,964 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:54,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:48:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:48:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:48:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:48:54,966 INFO L87 Difference]: Start difference. First operand 237 states and 283 transitions. Second operand has 33 states, 32 states have (on average 4.6875) internal successors, (150), 33 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:59,408 INFO L93 Difference]: Finished difference Result 498 states and 588 transitions. [2022-11-19 07:48:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:48:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.6875) internal successors, (150), 33 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-19 07:48:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:59,411 INFO L225 Difference]: With dead ends: 498 [2022-11-19 07:48:59,412 INFO L226 Difference]: Without dead ends: 498 [2022-11-19 07:48:59,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=472, Invalid=2390, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:48:59,413 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 225 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:59,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 435 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 76 Unchecked, 0.8s Time] [2022-11-19 07:48:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-19 07:48:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 293. [2022-11-19 07:48:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.21875) internal successors, (351), 292 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 351 transitions. [2022-11-19 07:48:59,422 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 351 transitions. Word has length 32 [2022-11-19 07:48:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:59,423 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 351 transitions. [2022-11-19 07:48:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.6875) internal successors, (150), 33 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 351 transitions. [2022-11-19 07:48:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:48:59,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:59,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:59,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:48:59,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:59,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-19 07:49:00,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:00,040 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:49:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:00,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1409463453, now seen corresponding path program 3 times [2022-11-19 07:49:00,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:49:00,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889104823] [2022-11-19 07:49:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:00,041 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 [2022-11-19 07:49:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:49:00,042 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:49:00,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-19 07:49:00,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:49:00,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:00,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:49:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:00,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:00,344 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:49:00,344 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 1 case distinctions, treesize of input 14 treesize of output 22 [2022-11-19 07:49:00,357 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 14 treesize of output 12 [2022-11-19 07:49:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:49:00,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:49:03,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:49:03,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889104823] [2022-11-19 07:49:03,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889104823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:03,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2073392894] [2022-11-19 07:49:03,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:49:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:49:03,055 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:49:03,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-19 07:49:03,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:49:03,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:49:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:03,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:03,563 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:49:03,564 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:49:03,579 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 [2022-11-19 07:49:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:49:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:06,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:49:06,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2073392894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633157731] [2022-11-19 07:49:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:06,260 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:06,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-19 07:49:06,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:49:06,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:06,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:49:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:06,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:06,557 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:49:06,558 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:49:06,575 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 42 treesize of output 38 [2022-11-19 07:49:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:49:07,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:49:10,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633157731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:10,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:49:10,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 13, 11] total 38 [2022-11-19 07:49:10,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118407408] [2022-11-19 07:49:10,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:49:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:49:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:49:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:49:10,591 INFO L87 Difference]: Start difference. First operand 293 states and 351 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:21,904 INFO L93 Difference]: Finished difference Result 658 states and 768 transitions. [2022-11-19 07:49:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 07:49:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 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 33 [2022-11-19 07:49:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:21,907 INFO L225 Difference]: With dead ends: 658 [2022-11-19 07:49:21,908 INFO L226 Difference]: Without dead ends: 647 [2022-11-19 07:49:21,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1051, Invalid=3641, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:49:21,909 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 724 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:21,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 563 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 715 Invalid, 0 Unknown, 75 Unchecked, 4.5s Time] [2022-11-19 07:49:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-19 07:49:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 425. [2022-11-19 07:49:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.2476190476190476) internal successors, (524), 424 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 524 transitions. [2022-11-19 07:49:21,921 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 524 transitions. Word has length 33 [2022-11-19 07:49:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:21,922 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 524 transitions. [2022-11-19 07:49:21,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 524 transitions. [2022-11-19 07:49:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:49:21,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:21,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:21,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-19 07:49:22,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-19 07:49:22,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-19 07:49:22,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:49:22,533 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:49:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -54518167, now seen corresponding path program 1 times [2022-11-19 07:49:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:49:22,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133472826] [2022-11-19 07:49:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:22,534 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 [2022-11-19 07:49:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:49:22,535 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:49:22,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:49:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:22,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:49:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:49:23,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:23,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:49:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:49:23,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:49:23,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133472826] [2022-11-19 07:49:23,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133472826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [782458978] [2022-11-19 07:49:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:49:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:49:23,936 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:49:23,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-19 07:49:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:49:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:49:24,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:24,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:49:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:49:24,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [782458978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987828332] [2022-11-19 07:49:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:24,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:24,976 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:24,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-19 07:49:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:49:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:49:25,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:25,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:49:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:49:25,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987828332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:25,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:49:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2022-11-19 07:49:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013460041] [2022-11-19 07:49:25,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:25,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:49:25,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:49:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:49:25,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:49:25,788 INFO L87 Difference]: Start difference. First operand 425 states and 524 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:28,142 INFO L93 Difference]: Finished difference Result 1350 states and 1647 transitions. [2022-11-19 07:49:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:49:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-19 07:49:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:28,150 INFO L225 Difference]: With dead ends: 1350 [2022-11-19 07:49:28,150 INFO L226 Difference]: Without dead ends: 1350 [2022-11-19 07:49:28,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:49:28,151 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 445 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:28,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 260 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:49:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-19 07:49:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 458. [2022-11-19 07:49:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 453 states have (on average 1.229580573951435) internal successors, (557), 457 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 557 transitions. [2022-11-19 07:49:28,167 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 557 transitions. Word has length 35 [2022-11-19 07:49:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:28,168 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 557 transitions. [2022-11-19 07:49:28,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 557 transitions. [2022-11-19 07:49:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:49:28,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:28,170 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:28,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:49:28,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-19 07:49:28,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-11-19 07:49:28,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:28,786 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:49:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1249695552, now seen corresponding path program 3 times [2022-11-19 07:49:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:49:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334012567] [2022-11-19 07:49:28,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:28,787 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 [2022-11-19 07:49:28,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:49:28,789 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:49:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:49:29,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:49:29,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:29,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:49:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:29,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:29,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:29,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:29,115 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 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-19 07:49:29,134 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:49:29,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:49:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:30,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:33,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:33,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:49:33,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334012567] [2022-11-19 07:49:33,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334012567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:33,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [909680292] [2022-11-19 07:49:33,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:33,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:49:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:49:33,233 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:49:33,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-19 07:49:33,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:49:33,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:49:33,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:34,076 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:49:34,076 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 1 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:49:34,104 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:49:34,104 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 44 treesize of output 45 [2022-11-19 07:49:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [909680292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882427503] [2022-11-19 07:49:43,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:49:43,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:43,420 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-19 07:49:44,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:49:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:49:44,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:49:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:44,483 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 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-19 07:49:44,502 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:49:44,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:49:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:46,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:51,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:51,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882427503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:51,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:49:51,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15, 15, 13, 13] total 62 [2022-11-19 07:49:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030431038] [2022-11-19 07:49:51,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:49:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-19 07:49:51,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:49:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-19 07:49:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=2869, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 07:49:51,922 INFO L87 Difference]: Start difference. First operand 458 states and 557 transitions. Second operand has 63 states, 62 states have (on average 2.967741935483871) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:07,561 INFO L93 Difference]: Finished difference Result 522 states and 637 transitions. [2022-11-19 07:50:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:50:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.967741935483871) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-19 07:50:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:07,564 INFO L225 Difference]: With dead ends: 522 [2022-11-19 07:50:07,564 INFO L226 Difference]: Without dead ends: 522 [2022-11-19 07:50:07,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=2022, Invalid=5118, Unknown=0, NotChecked=0, Total=7140 [2022-11-19 07:50:07,566 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 56 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:07,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 614 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 31 Unchecked, 2.2s Time] [2022-11-19 07:50:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-19 07:50:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2022-11-19 07:50:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 517 states have (on average 1.2321083172147003) internal successors, (637), 521 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 637 transitions. [2022-11-19 07:50:07,576 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 637 transitions. Word has length 35 [2022-11-19 07:50:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:07,576 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 637 transitions. [2022-11-19 07:50:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.967741935483871) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 637 transitions. [2022-11-19 07:50:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:50:07,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:07,578 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:07,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-19 07:50:07,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-19 07:50:07,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-19 07:50:08,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:50:08,190 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:50:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1396579989, now seen corresponding path program 3 times [2022-11-19 07:50:08,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:50:08,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529706703] [2022-11-19 07:50:08,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:50:08,191 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 [2022-11-19 07:50:08,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:50:08,192 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:50:08,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:50:08,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:50:08,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:50:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:50:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:08,573 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:50:08,574 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:50:08,591 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 42 treesize of output 38 [2022-11-19 07:50:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:50:09,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:50:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:50:13,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:50:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529706703] [2022-11-19 07:50:13,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529706703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [720393556] [2022-11-19 07:50:13,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:50:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:50:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:50:13,300 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:50:13,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-19 07:50:14,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:50:14,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:50:14,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:50:14,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:14,190 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:50:14,190 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:50:14,209 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 [2022-11-19 07:50:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:50:15,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:50:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:50:24,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [720393556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:24,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382338886] [2022-11-19 07:50:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:50:24,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:24,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:50:24,024 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:50:24,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-19 07:50:25,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:50:25,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:50:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:50:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:25,492 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 07:50:25,492 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 07:50:25,508 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 42 treesize of output 38 [2022-11-19 07:50:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:50:26,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:50:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:50:27,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382338886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:27,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:50:27,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16, 16, 13, 13] total 42 [2022-11-19 07:50:27,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420593245] [2022-11-19 07:50:27,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:50:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:50:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:50:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:50:27,585 INFO L87 Difference]: Start difference. First operand 522 states and 637 transitions. Second operand has 43 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:34,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:36,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:37,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:39,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:45,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:47,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:48,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:50,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:54,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:56,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:50:58,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:01,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:03,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:07,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:51:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:12,928 INFO L93 Difference]: Finished difference Result 2746 states and 3412 transitions. [2022-11-19 07:51:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:51:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 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 41 [2022-11-19 07:51:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:12,938 INFO L225 Difference]: With dead ends: 2746 [2022-11-19 07:51:12,938 INFO L226 Difference]: Without dead ends: 2746 [2022-11-19 07:51:12,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1062, Invalid=2720, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:51:12,940 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2445 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 66 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:12,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2445 Valid, 1148 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1260 Invalid, 11 Unknown, 93 Unchecked, 33.0s Time] [2022-11-19 07:51:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-11-19 07:51:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 586. [2022-11-19 07:51:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.23407917383821) internal successors, (717), 585 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 717 transitions. [2022-11-19 07:51:12,965 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 717 transitions. Word has length 41 [2022-11-19 07:51:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:12,965 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 717 transitions. [2022-11-19 07:51:12,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 717 transitions. [2022-11-19 07:51:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:51:12,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:12,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:12,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:13,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:13,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-19 07:51:13,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:13,572 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:51:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash 829184327, now seen corresponding path program 1 times [2022-11-19 07:51:13,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:51:13,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053792509] [2022-11-19 07:51:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:13,574 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 [2022-11-19 07:51:13,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:51:13,575 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:51:13,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:51:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:13,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:51:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:13,978 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:51:13,978 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:51:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:14,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:15,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:51:15,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053792509] [2022-11-19 07:51:15,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053792509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:15,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919778291] [2022-11-19 07:51:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:15,753 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:51:15,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:51:15,754 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:51:15,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-19 07:51:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:51:16,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:16,216 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:51:16,216 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:51:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:17,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:18,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919778291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531957966] [2022-11-19 07:51:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:18,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:18,430 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:18,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-19 07:51:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:51:18,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:18,779 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:51:18,780 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:51:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:19,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:20,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531957966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:20,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:51:20,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 8, 7, 7] total 25 [2022-11-19 07:51:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375638899] [2022-11-19 07:51:20,002 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:20,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:51:20,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:51:20,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:51:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:51:20,003 INFO L87 Difference]: Start difference. First operand 586 states and 717 transitions. Second operand has 26 states, 25 states have (on average 5.28) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:20,835 INFO L93 Difference]: Finished difference Result 1015 states and 1247 transitions. [2022-11-19 07:51:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:51:20,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.28) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 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 41 [2022-11-19 07:51:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:20,840 INFO L225 Difference]: With dead ends: 1015 [2022-11-19 07:51:20,840 INFO L226 Difference]: Without dead ends: 1015 [2022-11-19 07:51:20,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:51:20,841 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 189 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:20,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 396 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 64 Unchecked, 0.6s Time] [2022-11-19 07:51:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-11-19 07:51:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 657. [2022-11-19 07:51:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 652 states have (on average 1.2377300613496933) internal successors, (807), 656 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 807 transitions. [2022-11-19 07:51:20,856 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 807 transitions. Word has length 41 [2022-11-19 07:51:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:20,856 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 807 transitions. [2022-11-19 07:51:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.28) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 807 transitions. [2022-11-19 07:51:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:51:20,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:20,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:20,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:21,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:21,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:51:21,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:51:21,464 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:51:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash 510761222, now seen corresponding path program 1 times [2022-11-19 07:51:21,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:51:21,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165609542] [2022-11-19 07:51:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:51:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:51:21,466 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:51:21,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:51:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:21,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:51:21,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:22,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:22,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:51:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165609542] [2022-11-19 07:51:22,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165609542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1669417415] [2022-11-19 07:51:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:22,635 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:51:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:51:22,636 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:51:22,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 07:51:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:51:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:23,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:23,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1669417415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884253524] [2022-11-19 07:51:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:23,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:23,394 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:23,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-19 07:51:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:51:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:23,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:24,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884253524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:24,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:51:24,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 19 [2022-11-19 07:51:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580505270] [2022-11-19 07:51:24,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:51:24,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:51:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:51:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:51:24,018 INFO L87 Difference]: Start difference. First operand 657 states and 807 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:24,871 INFO L93 Difference]: Finished difference Result 962 states and 1156 transitions. [2022-11-19 07:51:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:51:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 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 43 [2022-11-19 07:51:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:24,873 INFO L225 Difference]: With dead ends: 962 [2022-11-19 07:51:24,874 INFO L226 Difference]: Without dead ends: 828 [2022-11-19 07:51:24,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:51:24,874 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 351 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:24,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 366 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:51:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-19 07:51:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 770. [2022-11-19 07:51:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 765 states have (on average 1.2366013071895425) internal successors, (946), 769 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 946 transitions. [2022-11-19 07:51:24,889 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 946 transitions. Word has length 43 [2022-11-19 07:51:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:24,889 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 946 transitions. [2022-11-19 07:51:24,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 946 transitions. [2022-11-19 07:51:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:51:24,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:24,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:24,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:25,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:25,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:51:25,497 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:51:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2013885157, now seen corresponding path program 1 times [2022-11-19 07:51:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:51:25,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590500732] [2022-11-19 07:51:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:25,498 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 [2022-11-19 07:51:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:51:25,499 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:51:25,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:51:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:51:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:51:26,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:26,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:51:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:51:27,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:51:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590500732] [2022-11-19 07:51:27,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590500732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074795632] [2022-11-19 07:51:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:51:27,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:51:27,092 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:51:27,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-19 07:51:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:51:27,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:51:28,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:51:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074795632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287232039] [2022-11-19 07:51:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:28,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:28,973 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:28,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-19 07:51:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:51:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:51:29,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:51:30,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287232039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:30,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:51:30,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 11, 9, 7] total 45 [2022-11-19 07:51:30,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538093695] [2022-11-19 07:51:30,309 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:30,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:51:30,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:51:30,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:51:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:51:30,311 INFO L87 Difference]: Start difference. First operand 770 states and 946 transitions. Second operand has 45 states, 45 states have (on average 4.044444444444444) internal successors, (182), 45 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:43,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:43,905 INFO L93 Difference]: Finished difference Result 1697 states and 2024 transitions. [2022-11-19 07:51:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 07:51:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.044444444444444) internal successors, (182), 45 states have internal predecessors, (182), 0 states have call successors, (0), 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 44 [2022-11-19 07:51:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:43,911 INFO L225 Difference]: With dead ends: 1697 [2022-11-19 07:51:43,911 INFO L226 Difference]: Without dead ends: 1674 [2022-11-19 07:51:43,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1504, Invalid=7808, Unknown=0, NotChecked=0, Total=9312 [2022-11-19 07:51:43,915 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1355 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:43,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1355 Valid, 922 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-19 07:51:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-19 07:51:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 775. [2022-11-19 07:51:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 770 states have (on average 1.2233766233766235) internal successors, (942), 774 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 942 transitions. [2022-11-19 07:51:43,932 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 942 transitions. Word has length 44 [2022-11-19 07:51:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:43,932 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 942 transitions. [2022-11-19 07:51:43,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.044444444444444) internal successors, (182), 45 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 942 transitions. [2022-11-19 07:51:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:51:43,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:43,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:43,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:44,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-19 07:51:44,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-19 07:51:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:44,548 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:51:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1937706185, now seen corresponding path program 2 times [2022-11-19 07:51:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:51:44,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681629310] [2022-11-19 07:51:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:51:44,550 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 [2022-11-19 07:51:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:51:44,551 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:51:44,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:51:44,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:51:44,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:51:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:45,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:46,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 07:51:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:51:46,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:51:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681629310] [2022-11-19 07:51:46,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681629310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829834412] [2022-11-19 07:51:46,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:51:46,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:51:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:51:46,923 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:51:46,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-19 07:51:47,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:51:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:51:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:51:47,448 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:51:47,448 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 1 case distinctions, treesize of input 14 treesize of output 22 [2022-11-19 07:51:47,477 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:51:47,477 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 44 treesize of output 45 [2022-11-19 07:51:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:48,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:51,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:51:51,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:51:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:51,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829834412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:51,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523359870] [2022-11-19 07:51:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:51:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:51:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:51,567 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:51:51,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-19 07:51:51,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:51:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:51:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:52,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:51:52,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 07:51:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:51:52,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523359870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:51:52,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:51:52,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 12, 11, 8, 9] total 35 [2022-11-19 07:51:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781458922] [2022-11-19 07:51:52,852 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:52,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:51:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:51:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:51:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:51:52,854 INFO L87 Difference]: Start difference. First operand 775 states and 942 transitions. Second operand has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:57,556 INFO L93 Difference]: Finished difference Result 1635 states and 1952 transitions. [2022-11-19 07:51:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:51:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 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 47 [2022-11-19 07:51:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:57,561 INFO L225 Difference]: With dead ends: 1635 [2022-11-19 07:51:57,562 INFO L226 Difference]: Without dead ends: 1635 [2022-11-19 07:51:57,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:51:57,563 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 479 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:57,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 719 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 608 Invalid, 0 Unknown, 37 Unchecked, 2.5s Time] [2022-11-19 07:51:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-19 07:51:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1331. [2022-11-19 07:51:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1326 states have (on average 1.2239819004524888) internal successors, (1623), 1330 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1623 transitions. [2022-11-19 07:51:57,585 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1623 transitions. Word has length 47 [2022-11-19 07:51:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:57,586 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1623 transitions. [2022-11-19 07:51:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1623 transitions. [2022-11-19 07:51:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:51:57,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:57,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:57,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:51:57,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-19 07:51:58,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-19 07:51:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:51:58,202 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:51:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 420978799, now seen corresponding path program 3 times [2022-11-19 07:51:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:51:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935908516] [2022-11-19 07:51:58,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:51:58,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:51:58,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:51:58,204 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:51:58,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:51:58,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:51:58,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:51:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:51:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:51:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:51:59,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:00,368 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 35 treesize of output 29 [2022-11-19 07:52:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:52:00,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:52:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935908516] [2022-11-19 07:52:00,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935908516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [378879370] [2022-11-19 07:52:00,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:52:00,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:52:00,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:52:00,959 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:52:00,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-19 07:52:02,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:52:02,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:02,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:52:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:02,289 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:52:02,290 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 1 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:52:02,322 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:52:02,323 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 90 treesize of output 89 [2022-11-19 07:52:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:04,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:52:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [378879370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246057709] [2022-11-19 07:52:10,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:52:10,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:10,382 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:10,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-19 07:52:10,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:52:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:52:10,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:11,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:11,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 07:52:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:11,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246057709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:11,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:52:11,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 12, 12, 8, 9] total 36 [2022-11-19 07:52:11,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819542519] [2022-11-19 07:52:11,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:52:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:52:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:52:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:52:11,969 INFO L87 Difference]: Start difference. First operand 1331 states and 1623 transitions. Second operand has 37 states, 36 states have (on average 4.805555555555555) internal successors, (173), 37 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:29,428 INFO L93 Difference]: Finished difference Result 2146 states and 2548 transitions. [2022-11-19 07:52:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-19 07:52:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.805555555555555) internal successors, (173), 37 states have internal predecessors, (173), 0 states have call successors, (0), 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 47 [2022-11-19 07:52:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:29,434 INFO L225 Difference]: With dead ends: 2146 [2022-11-19 07:52:29,434 INFO L226 Difference]: Without dead ends: 2146 [2022-11-19 07:52:29,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=916, Invalid=4486, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 07:52:29,436 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 594 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:29,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1003 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 616 Invalid, 0 Unknown, 132 Unchecked, 3.7s Time] [2022-11-19 07:52:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-11-19 07:52:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1644. [2022-11-19 07:52:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1639 states have (on average 1.2196461256863942) internal successors, (1999), 1643 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 1999 transitions. [2022-11-19 07:52:29,464 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 1999 transitions. Word has length 47 [2022-11-19 07:52:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:29,465 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 1999 transitions. [2022-11-19 07:52:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.805555555555555) internal successors, (173), 37 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 1999 transitions. [2022-11-19 07:52:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:52:29,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:29,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:29,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:29,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-11-19 07:52:29,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-19 07:52:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:52:30,084 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:52:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -240796018, now seen corresponding path program 4 times [2022-11-19 07:52:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:52:30,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550015068] [2022-11-19 07:52:30,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:52:30,086 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 [2022-11-19 07:52:30,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:52:30,087 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:52:30,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:52:30,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:52:30,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:52:30,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:30,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:31,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:52:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550015068] [2022-11-19 07:52:31,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550015068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:31,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1069243124] [2022-11-19 07:52:31,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:52:31,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:52:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:52:31,556 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:52:31,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-19 07:52:32,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:52:32,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:52:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:52:32,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:52:32,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1069243124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326913457] [2022-11-19 07:52:32,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:52:32,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:32,759 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:32,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-19 07:52:33,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:52:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:52:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:52:33,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:52:33,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326913457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:33,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:52:33,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13, 12, 13, 12] total 31 [2022-11-19 07:52:33,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048562591] [2022-11-19 07:52:33,421 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:33,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:52:33,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:52:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:52:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:52:33,422 INFO L87 Difference]: Start difference. First operand 1644 states and 1999 transitions. Second operand has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:36,300 INFO L93 Difference]: Finished difference Result 3546 states and 4232 transitions. [2022-11-19 07:52:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 07:52:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 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 49 [2022-11-19 07:52:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:36,311 INFO L225 Difference]: With dead ends: 3546 [2022-11-19 07:52:36,312 INFO L226 Difference]: Without dead ends: 3488 [2022-11-19 07:52:36,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=766, Invalid=2656, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 07:52:36,313 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 673 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:36,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1143 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:52:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-11-19 07:52:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 2916. [2022-11-19 07:52:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2911 states have (on average 1.2318790793541738) internal successors, (3586), 2915 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3586 transitions. [2022-11-19 07:52:36,353 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3586 transitions. Word has length 49 [2022-11-19 07:52:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:36,353 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 3586 transitions. [2022-11-19 07:52:36,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3586 transitions. [2022-11-19 07:52:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:52:36,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:36,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:36,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:36,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-19 07:52:36,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:36,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:52:36,971 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:52:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash -722595117, now seen corresponding path program 2 times [2022-11-19 07:52:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:52:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336608872] [2022-11-19 07:52:36,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:52:36,972 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 [2022-11-19 07:52:36,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:52:36,973 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:52:36,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:52:37,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:52:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:52:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:37,310 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:52:37,310 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 1 case distinctions, treesize of input 14 treesize of output 22 [2022-11-19 07:52:37,345 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:52:37,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-11-19 07:52:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:38,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:52:40,652 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:52:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336608872] [2022-11-19 07:52:40,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336608872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1546700406] [2022-11-19 07:52:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:52:40,653 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:52:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:52:40,654 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:52:40,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-19 07:52:41,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:52:41,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:41,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:52:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:41,301 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:52:41,301 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 1 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:52:41,328 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:52:41,329 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 44 treesize of output 45 [2022-11-19 07:52:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:43,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:46,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:46,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1546700406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707071577] [2022-11-19 07:52:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:52:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:46,689 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:46,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-19 07:52:46,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:52:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:52:46,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:52:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:46,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:46,997 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 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-19 07:52:47,011 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:52:47,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:52:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:49,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:52,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:52,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:52:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707071577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:52,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:52:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 11, 11, 11] total 50 [2022-11-19 07:52:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418307343] [2022-11-19 07:52:52,902 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:52:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:52:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:52:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2152, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:52:52,903 INFO L87 Difference]: Start difference. First operand 2916 states and 3586 transitions. Second operand has 51 states, 50 states have (on average 4.82) internal successors, (241), 51 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:02,109 INFO L93 Difference]: Finished difference Result 4013 states and 4884 transitions. [2022-11-19 07:53:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:53:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.82) internal successors, (241), 51 states have internal predecessors, (241), 0 states have call successors, (0), 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 50 [2022-11-19 07:53:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:02,120 INFO L225 Difference]: With dead ends: 4013 [2022-11-19 07:53:02,120 INFO L226 Difference]: Without dead ends: 4013 [2022-11-19 07:53:02,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=690, Invalid=3216, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 07:53:02,121 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:02,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 726 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 154 Unchecked, 1.7s Time] [2022-11-19 07:53:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2022-11-19 07:53:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2711. [2022-11-19 07:53:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2706 states have (on average 1.2257945306725795) internal successors, (3317), 2710 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3317 transitions. [2022-11-19 07:53:02,178 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3317 transitions. Word has length 50 [2022-11-19 07:53:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:02,178 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3317 transitions. [2022-11-19 07:53:02,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.82) internal successors, (241), 51 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3317 transitions. [2022-11-19 07:53:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 07:53:02,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:02,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:02,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:02,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:53:02,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-19 07:53:02,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:53:02,792 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:53:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1022969014, now seen corresponding path program 3 times [2022-11-19 07:53:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:53:02,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87881751] [2022-11-19 07:53:02,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:53:02,793 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 [2022-11-19 07:53:02,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:53:02,794 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:53:02,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:53:03,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:53:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:53:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:03,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:04,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:53:04,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87881751] [2022-11-19 07:53:04,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87881751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:04,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752871004] [2022-11-19 07:53:04,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:53:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:53:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:53:04,876 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:53:04,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-19 07:53:06,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:53:06,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 07:53:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:53:06,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:53:06,606 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:53:06,606 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 1 case distinctions, treesize of input 16 treesize of output 24 [2022-11-19 07:53:06,638 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 07:53:06,639 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 44 treesize of output 45 [2022-11-19 07:53:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:53:20,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752871004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793636983] [2022-11-19 07:53:20,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:53:20,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:20,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:20,458 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:20,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-19 07:53:20,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:53:20,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:53:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:21,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:53:21,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:53:21,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:53:21,200 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 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-19 07:53:21,215 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:53:21,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:53:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:53:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:27,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:53:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:53:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:53:27,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793636983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:27,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:53:27,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 15, 9, 9] total 60 [2022-11-19 07:53:27,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934445986] [2022-11-19 07:53:27,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:53:27,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-19 07:53:27,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:53:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-19 07:53:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=3041, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:53:27,338 INFO L87 Difference]: Start difference. First operand 2711 states and 3317 transitions. Second operand has 60 states, 60 states have (on average 4.5) internal successors, (270), 60 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:36,491 INFO L93 Difference]: Finished difference Result 3367 states and 4089 transitions. [2022-11-19 07:53:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:53:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.5) internal successors, (270), 60 states have internal predecessors, (270), 0 states have call successors, (0), 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 52 [2022-11-19 07:53:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:36,504 INFO L225 Difference]: With dead ends: 3367 [2022-11-19 07:53:36,505 INFO L226 Difference]: Without dead ends: 3335 [2022-11-19 07:53:36,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 260 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=945, Invalid=5697, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 07:53:36,506 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 387 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:36,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 836 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 80 Unchecked, 1.3s Time] [2022-11-19 07:53:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-11-19 07:53:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3167. [2022-11-19 07:53:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3162 states have (on average 1.228336495888678) internal successors, (3884), 3166 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 3884 transitions. [2022-11-19 07:53:36,552 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 3884 transitions. Word has length 52 [2022-11-19 07:53:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:36,553 INFO L495 AbstractCegarLoop]: Abstraction has 3167 states and 3884 transitions. [2022-11-19 07:53:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.5) internal successors, (270), 60 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 3884 transitions. [2022-11-19 07:53:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:53:36,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:36,556 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:36,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (104)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:36,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:53:36,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:37,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:37,164 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:53:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:37,164 INFO L85 PathProgramCache]: Analyzing trace with hash -958451034, now seen corresponding path program 1 times [2022-11-19 07:53:37,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:53:37,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705989820] [2022-11-19 07:53:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:37,165 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 [2022-11-19 07:53:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:53:37,166 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:53:37,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:53:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:53:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:53:37,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:39,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 07:53:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:53:40,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:53:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705989820] [2022-11-19 07:53:40,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705989820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985385475] [2022-11-19 07:53:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:40,164 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:53:40,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:53:40,166 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:53:40,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-19 07:53:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:40,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:53:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:53:40,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:41,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 07:53:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:53:41,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [985385475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:41,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826450867] [2022-11-19 07:53:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:41,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:41,710 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:41,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-19 07:53:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:41,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:53:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:53:42,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:42,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-19 07:53:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:53:42,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826450867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:42,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:53:42,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 13, 10, 13] total 22 [2022-11-19 07:53:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395892724] [2022-11-19 07:53:42,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:53:42,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:53:42,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:53:42,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:53:42,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:53:42,937 INFO L87 Difference]: Start difference. First operand 3167 states and 3884 transitions. Second operand has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:49,138 INFO L93 Difference]: Finished difference Result 5236 states and 6209 transitions. [2022-11-19 07:53:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:53:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 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 53 [2022-11-19 07:53:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:49,150 INFO L225 Difference]: With dead ends: 5236 [2022-11-19 07:53:49,150 INFO L226 Difference]: Without dead ends: 5196 [2022-11-19 07:53:49,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=539, Invalid=1717, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:53:49,151 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1088 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:49,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1088 Valid, 498 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-19 07:53:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5196 states. [2022-11-19 07:53:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5196 to 2845. [2022-11-19 07:53:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2840 states have (on average 1.2242957746478873) internal successors, (3477), 2844 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 3477 transitions. [2022-11-19 07:53:49,218 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 3477 transitions. Word has length 53 [2022-11-19 07:53:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:49,219 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 3477 transitions. [2022-11-19 07:53:49,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 3477 transitions. [2022-11-19 07:53:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:53:49,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:49,221 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:49,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:49,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (107)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:49,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:53:49,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:53:49,832 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:53:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash 806102886, now seen corresponding path program 4 times [2022-11-19 07:53:49,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:53:49,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150498160] [2022-11-19 07:53:49,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:53:49,834 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 [2022-11-19 07:53:49,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:53:49,835 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:53:49,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-19 07:53:50,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:53:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:50,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:53:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:50,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:51,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:53:51,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150498160] [2022-11-19 07:53:51,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150498160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:51,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [963965243] [2022-11-19 07:53:51,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:53:51,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:53:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:53:51,861 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:53:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-19 07:53:52,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:53:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:53:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:53,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:53,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [963965243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424890519] [2022-11-19 07:53:53,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:53:53,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:53,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:53,654 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-19 07:53:53,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:53:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:53,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:53:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:54,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:54,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424890519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:53:54,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:53:54,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12, 11, 13, 12] total 33 [2022-11-19 07:53:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12102038] [2022-11-19 07:53:54,719 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:53:54,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:53:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:53:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:53:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:53:54,721 INFO L87 Difference]: Start difference. First operand 2845 states and 3477 transitions. Second operand has 33 states, 33 states have (on average 4.878787878787879) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:56,662 INFO L93 Difference]: Finished difference Result 2743 states and 3301 transitions. [2022-11-19 07:53:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:53:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.878787878787879) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 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 55 [2022-11-19 07:53:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:56,668 INFO L225 Difference]: With dead ends: 2743 [2022-11-19 07:53:56,669 INFO L226 Difference]: Without dead ends: 2456 [2022-11-19 07:53:56,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:53:56,670 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 486 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:56,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1095 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:53:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-11-19 07:53:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2223. [2022-11-19 07:53:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2218 states have (on average 1.217312894499549) internal successors, (2700), 2222 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2700 transitions. [2022-11-19 07:53:56,695 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2700 transitions. Word has length 55 [2022-11-19 07:53:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:56,695 INFO L495 AbstractCegarLoop]: Abstraction has 2223 states and 2700 transitions. [2022-11-19 07:53:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.878787878787879) internal successors, (161), 33 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2700 transitions. [2022-11-19 07:53:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:53:56,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:56,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:56,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:56,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-19 07:53:57,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-19 07:53:57,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:53:57,321 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:53:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash -878193103, now seen corresponding path program 2 times [2022-11-19 07:53:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:53:57,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065625025] [2022-11-19 07:53:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:53:57,322 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 [2022-11-19 07:53:57,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:53:57,323 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:53:57,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:53:57,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:53:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:53:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:57,770 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:53:57,771 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:53:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:53:58,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:54:01,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:54:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065625025] [2022-11-19 07:54:01,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065625025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1658453480] [2022-11-19 07:54:01,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:54:01,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:54:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:54:01,798 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:54:01,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-19 07:54:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:54:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:54:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:02,650 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:54:02,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:54:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:54:04,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:54:07,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1658453480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:07,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660525249] [2022-11-19 07:54:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:54:07,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:07,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:07,648 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:07,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-19 07:54:07,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:54:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:54:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:08,098 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:54:08,098 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:54:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:54:09,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:54:14,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660525249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:14,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:54:14,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12, 11, 11, 11] total 42 [2022-11-19 07:54:14,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033789228] [2022-11-19 07:54:14,942 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:14,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:54:14,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:54:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:54:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:54:14,945 INFO L87 Difference]: Start difference. First operand 2223 states and 2700 transitions. Second operand has 43 states, 42 states have (on average 5.761904761904762) internal successors, (242), 43 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:16,839 INFO L93 Difference]: Finished difference Result 2548 states and 3074 transitions. [2022-11-19 07:54:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:54:16,841 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 5.761904761904762) internal successors, (242), 43 states have internal predecessors, (242), 0 states have call successors, (0), 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 56 [2022-11-19 07:54:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:16,844 INFO L225 Difference]: With dead ends: 2548 [2022-11-19 07:54:16,844 INFO L226 Difference]: Without dead ends: 2410 [2022-11-19 07:54:16,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:54:16,845 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 453 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:16,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 992 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 248 Invalid, 0 Unknown, 69 Unchecked, 1.0s Time] [2022-11-19 07:54:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-11-19 07:54:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2099. [2022-11-19 07:54:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2094 states have (on average 1.2297039159503342) internal successors, (2575), 2098 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2575 transitions. [2022-11-19 07:54:16,872 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2575 transitions. Word has length 56 [2022-11-19 07:54:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:16,872 INFO L495 AbstractCegarLoop]: Abstraction has 2099 states and 2575 transitions. [2022-11-19 07:54:16,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 5.761904761904762) internal successors, (242), 43 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2575 transitions. [2022-11-19 07:54:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:54:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:16,875 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:16,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (113)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:17,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:17,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:54:17,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:54:17,483 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:54:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:17,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1544267116, now seen corresponding path program 5 times [2022-11-19 07:54:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:54:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645183290] [2022-11-19 07:54:17,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:54:17,484 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 [2022-11-19 07:54:17,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:54:17,485 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:54:17,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-19 07:54:18,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:54:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:18,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:54:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:54:18,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 11 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:54:20,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:54:20,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645183290] [2022-11-19 07:54:20,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645183290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121807042] [2022-11-19 07:54:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:54:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:54:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:54:20,580 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:54:20,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-19 07:57:40,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:57:40,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:57:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:57:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:41,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 11 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:43,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121807042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:43,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466495479] [2022-11-19 07:57:43,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:57:43,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:43,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:43,096 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:43,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-19 07:57:48,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:57:48,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:57:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:57:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:49,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466495479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:49,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:57:49,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 20, 17] total 60 [2022-11-19 07:57:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821315909] [2022-11-19 07:57:49,785 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:49,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-19 07:57:49,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:57:49,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-19 07:57:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:57:49,788 INFO L87 Difference]: Start difference. First operand 2099 states and 2575 transitions. Second operand has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 60 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:57,646 INFO L93 Difference]: Finished difference Result 3608 states and 4284 transitions. [2022-11-19 07:57:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 07:57:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 60 states have internal predecessors, (190), 0 states have call successors, (0), 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 57 [2022-11-19 07:57:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:57,652 INFO L225 Difference]: With dead ends: 3608 [2022-11-19 07:57:57,652 INFO L226 Difference]: Without dead ends: 3575 [2022-11-19 07:57:57,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1530, Invalid=7976, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 07:57:57,654 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 2311 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:57,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2311 Valid, 3411 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 07:57:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2022-11-19 07:57:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2783. [2022-11-19 07:57:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2778 states have (on average 1.2491000719942404) internal successors, (3470), 2782 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 3470 transitions. [2022-11-19 07:57:57,701 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 3470 transitions. Word has length 57 [2022-11-19 07:57:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:57,702 INFO L495 AbstractCegarLoop]: Abstraction has 2783 states and 3470 transitions. [2022-11-19 07:57:57,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.1666666666666665) internal successors, (190), 60 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 3470 transitions. [2022-11-19 07:57:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:57:57,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:57,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:57,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:57,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (116)] Ended with exit code 0 [2022-11-19 07:57:58,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:58,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:57:58,318 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 07:57:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash -481096023, now seen corresponding path program 5 times [2022-11-19 07:57:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:57:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774948186] [2022-11-19 07:57:58,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:57:58,319 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 [2022-11-19 07:57:58,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:57:58,320 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:57:58,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:57:58,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 07:57:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:57:58,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:57:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:57:59,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:00,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 07:58:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:58:01,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:58:01,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774948186] [2022-11-19 07:58:01,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774948186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:01,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1791256330] [2022-11-19 07:58:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 07:58:01,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:58:01,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:58:01,646 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:58:01,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-19 08:01:34,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 08:01:34,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:01:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:34,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:35,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 08:01:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1791256330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582910118] [2022-11-19 08:01:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:01:35,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:35,694 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-19 08:01:47,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-19 08:01:47,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:47,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:01:47,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:48,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:48,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-19 08:01:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:48,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582910118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:48,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:48,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 19 [2022-11-19 08:01:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434527280] [2022-11-19 08:01:48,771 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:48,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:01:48,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:01:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:01:48,773 INFO L87 Difference]: Start difference. First operand 2783 states and 3470 transitions. Second operand has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:56,215 INFO L93 Difference]: Finished difference Result 16714 states and 20845 transitions. [2022-11-19 08:01:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 08:01:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 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 59 [2022-11-19 08:01:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:56,246 INFO L225 Difference]: With dead ends: 16714 [2022-11-19 08:01:56,246 INFO L226 Difference]: Without dead ends: 16714 [2022-11-19 08:01:56,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=509, Invalid=2247, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:01:56,248 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1837 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1837 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:56,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1837 Valid, 1052 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-19 08:01:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2022-11-19 08:01:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 3258. [2022-11-19 08:01:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3253 states have (on average 1.241623117122656) internal successors, (4039), 3257 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 4039 transitions. [2022-11-19 08:01:56,405 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 4039 transitions. Word has length 59 [2022-11-19 08:01:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:56,406 INFO L495 AbstractCegarLoop]: Abstraction has 3258 states and 4039 transitions. [2022-11-19 08:01:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 4039 transitions. [2022-11-19 08:01:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:01:56,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:56,408 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:56,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:01:56,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:56,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-19 08:01:57,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:57,024 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-19 08:01:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash -987577769, now seen corresponding path program 6 times [2022-11-19 08:01:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:57,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484062631] [2022-11-19 08:01:57,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:01:57,026 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 [2022-11-19 08:01:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:57,026 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:01:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 08:01:57,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-19 08:01:57,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:01:57,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:57,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:57,566 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 08:01:57,566 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 08:01:57,581 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 42 treesize of output 38 [2022-11-19 08:01:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:01:58,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:02,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:02:02,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484062631] [2022-11-19 08:02:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484062631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612639416] [2022-11-19 08:02:02,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:02:02,196 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:02:02,198 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:02:02,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-19 08:02:03,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-19 08:02:03,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:02:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:03,386 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 08:02:03,387 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 08:02:03,398 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 [2022-11-19 08:02:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:02:04,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:02:11,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612639416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621858862] [2022-11-19 08:02:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:02:11,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:11,892 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:11,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146e7f0f-0b65-43ef-803d-9c5e263f85e4/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-19 08:02:12,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-19 08:02:12,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:02:12,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:12,725 INFO L321 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2022-11-19 08:02:12,725 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 1 case distinctions, treesize of input 14 treesize of output 25 [2022-11-19 08:02:12,737 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 [2022-11-19 08:02:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:16,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:28,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621858862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:28,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:02:28,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 14, 19, 19] total 70 [2022-11-19 08:02:28,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146652937] [2022-11-19 08:02:28,705 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:28,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-19 08:02:28,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:02:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-19 08:02:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=4305, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 08:02:28,706 INFO L87 Difference]: Start difference. First operand 3258 states and 4039 transitions. Second operand has 71 states, 70 states have (on average 3.3142857142857145) internal successors, (232), 71 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)